Rename overlay manager routines

59 files changed, 499 insertions, 499 deletions

diff --git a/arm9/asm/unk_020372D4.s b/arm9/asm/unk_020372D4.s
index abbd1d7e..cb831ada 100644
--- a/arm9/asm/unk_020372D4.s
+++ b/arm9/asm/unk_020372D4.s
@@ -15,7 +15,7 @@ UNK_021C5A08: ; 0x021C5A08
 FUN_020372D4: ; 0x020372D4
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0x0
 	add r0, r5, #0x0
 	bl FUN_02037400
@@ -51,7 +51,7 @@ _02037318: .word UNK_021C5A08
 	thumb_func_start FUN_0203731C
 FUN_0203731C: ; 0x0203731C
 	push {r3, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	bl FUN_02037524
 	cmp r0, #0x0
 	beq _0203732E
@@ -68,7 +68,7 @@ FUN_02037334: ; 0x02037334
 	bl FUN_020374B0
 	ldr r0, _02037348 ; =SDK_OVERLAY_MODULE_63_ID
 	ldr r1, _0203734C ; =MOD63_021DBAB8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #0x1
 	pop {r3, pc}
 	nop
@@ -101,7 +101,7 @@ _0203736C:
 	str r1, [r0, #0x8]
 	ldr r0, _02037390 ; =UNK05_021F64C8
 	add r1, r4, #0x0
-	bl FUN_02006234
+	bl OverlayManager_new
 	ldr r1, [r4, #0x0]
 	str r0, [r1, #0x0]
 	pop {r4, pc}
@@ -173,7 +173,7 @@ _020373E8:
 	add r0, r4, #0x0
 	add r1, r6, #0x0
 	mov r2, #0xb
-	bl FUN_02006234
+	bl OverlayManager_new
 	ldr r1, [r5, #0x0]
 	str r0, [r1, #0x4]
 	pop {r4-r6, pc}
@@ -200,7 +200,7 @@ FUN_02037400: ; 0x02037400
 	add r0, r5, #0x0
 	mov r1, #0xb8
 	mov r2, #0xb
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0x0
 	mov r2, #0xb8
 	add r4, r0, #0x0
@@ -218,7 +218,7 @@ FUN_02037400: ; 0x02037400
 	ldr r0, [r4, #0x0]
 	str r1, [r0, #0xc]
 	add r0, r5, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #0x8]
 	str r0, [r4, #0xc]
 	mov r0, #0x0
@@ -259,7 +259,7 @@ FUN_02037400: ; 0x02037400
 FUN_020374B0: ; 0x020374B0
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	ldr r0, [r4, #0x28]
 	bl FUN_020344D0
@@ -280,7 +280,7 @@ FUN_020374B0: ; 0x020374B0
 	ldr r0, [r4, #0x0]
 	bl FreeToHeap
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x5b
 	bl FUN_020168D0
 	mov r0, #0xb
@@ -296,11 +296,11 @@ FUN_02037504: ; 0x02037504
 	ldr r0, [r4, #0x0]
 	cmp r0, #0x0
 	beq _02037520
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0x0
 	beq _02037520
 	ldr r0, [r4, #0x0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	mov r0, #0x0
 	str r0, [r4, #0x0]
 _02037520:
diff --git a/arm9/asm/unk_0206C700.s b/arm9/asm/unk_0206C700.s
index 7387f701..a11f74e3 100644
--- a/arm9/asm/unk_0206C700.s
+++ b/arm9/asm/unk_0206C700.s
@@ -1425,14 +1425,14 @@ _0206D260:
 	pop {r3-r4, pc}
 _0206D2E2:
 	ldr r0, [r4, #0x38]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0x0
 	bne _0206D2EE
 _0206D2EC:
 	b _0206D806
 _0206D2EE:
 	ldr r0, [r4, #0x38]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	ldr r1, [r4, #0x0]
 	add r0, r4, #0x0
 	bl FUN_0206D9B4
@@ -2743,7 +2743,7 @@ FUN_0206DE0C: ; 0x0206DE0C
 	ldr r0, _0206DE20 ; =UNK_020FA6E8
 	ldr r1, [r4, #0x3c]
 	ldr r2, [r4, #0x5c]
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x38]
 	pop {r4, pc}
 	nop
diff --git a/arm9/asm/unk_0206F3FC.s b/arm9/asm/unk_0206F3FC.s
index 5c8bbf31..7a1729d2 100644
--- a/arm9/asm/unk_0206F3FC.s
+++ b/arm9/asm/unk_0206F3FC.s
@@ -307,7 +307,7 @@ _0206F5A8: .word FUN_0206FB58
 FUN_0206F5AC: ; 0x0206F5AC
 	push {r3-r5, lr}
 	add r4, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4, #0x0]
 	add r5, r0, #0x0
 	cmp r1, #0x1c
@@ -960,7 +960,7 @@ _0206FAA0: .word 0x000006A4
 FUN_0206FAA4: ; 0x0206FAA4
 	push {r3-r7, lr}
 	str r0, [sp, #0x0]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0x0
 	mov r0, #0x0
 	add r1, r0, #0x0
@@ -1017,7 +1017,7 @@ _0206FAFC:
 	bl FUN_0206BB74
 _0206FB30:
 	ldr r0, [sp, #0x0]
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0xc
 	bl FUN_020168D0
 	mov r0, #0x1
@@ -1395,13 +1395,13 @@ FUN_0206FE74: ; 0x0206FE74
 	ldr r1, _0206FF50 ; =0x00000B38
 	mov r2, #0xc
 	add r4, r0, #0x0
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _0206FF50 ; =0x00000B38
 	mov r1, #0x0
 	add r6, r0, #0x0
 	bl memset
 	add r0, r4, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, _0206FF54 ; =0x000005A4
 	str r0, [r6, r1]
 	mov r0, #0xc
diff --git a/arm9/asm/unk_020772F0.s b/arm9/asm/unk_020772F0.s
index 5c572392..32c718a6 100644
--- a/arm9/asm/unk_020772F0.s
+++ b/arm9/asm/unk_020772F0.s
@@ -410,7 +410,7 @@ _020772FE:
 	add r0, r6, #0x0
 	lsl r1, r1, #0x4
 	mov r2, #0x12
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x5d
 	mov r1, #0x0
 	lsl r2, r2, #0x4
@@ -459,7 +459,7 @@ _020772FE:
 	ldr r0, [r4, r0]
 	bl FUN_02077B44
 	add r0, r6, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r1, r0, #0x0
 	add r0, r4, #0x0
 	bl FUN_02077B08
@@ -527,7 +527,7 @@ _020772FE:
 	str r0, [r5, #0x0]
 	b _02077490
 _02077456:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	ldr r0, [r4, #0x0]
 	cmp r0, #0x1
@@ -599,7 +599,7 @@ FUN_020774EC: ; 0x020774EC
 	sub sp, #0x10
 	add r5, r1, #0x0
 	add r6, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5, #0x0]
 	add r4, r0, #0x0
 	cmp r1, #0x3
@@ -1065,10 +1065,10 @@ FUN_02077894: ; 0x02077894
 	push {r4-r7, lr}
 	sub sp, #0x14
 	str r0, [sp, #0x10]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	ldr r0, [sp, #0x10]
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r5, r0, #0x0
 	mov r0, #0x56
 	lsl r0, r0, #0x2
@@ -1253,7 +1253,7 @@ _02077A0C:
 	ldr r0, [r4, r0]
 	bl FUN_0200AB18
 	ldr r0, [sp, #0x10]
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x0
 	add r1, r0, #0x0
 	bl FUN_02015F10
@@ -1564,7 +1564,7 @@ FUN_02077CD4: ; 0x02077CD4
 	sub sp, #0x10
 	add r4, r0, #0x0
 	add r0, r1, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r7, r0, #0x0
 	ldr r0, _02077E7C ; =0x0000045C
 	mov r1, #0x4
@@ -1772,7 +1772,7 @@ FUN_02077E90: ; 0x02077E90
 	sub sp, #0x14
 	add r5, r0, #0x0
 	add r0, r1, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0x0
 	ldr r0, [r4, #0x44]
 	cmp r0, #0x0
@@ -3265,7 +3265,7 @@ _02078A90:
 	add r0, r5, r0
 	bl FUN_02078894
 	add r0, r6, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x46
 	lsl r1, r1, #0x2
 	ldrh r2, [r5, r1]
diff --git a/arm9/asm/unk_02079C70.s b/arm9/asm/unk_02079C70.s
index 5dd4a4a5..c49c2d67 100644
--- a/arm9/asm/unk_02079C70.s
+++ b/arm9/asm/unk_02079C70.s
@@ -96,13 +96,13 @@ FUN_02079C7C: ; 0x02079C7C
 	ldr r1, _02079DAC ; =0x0000069C
 	add r0, r4, #0x0
 	mov r2, #0x13
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _02079DAC ; =0x0000069C
 	mov r1, #0x0
 	add r5, r0, #0x0
 	bl memset
 	add r0, r4, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x93
 	lsl r1, r1, #0x2
 	str r0, [r5, r1]
@@ -176,7 +176,7 @@ _02079DB0: .word FUN_02079F24
 FUN_02079DB4: ; 0x02079DB4
 	push {r3-r5, lr}
 	add r4, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4, #0x0]
 	add r5, r0, #0x0
 	cmp r1, #0x13
@@ -314,7 +314,7 @@ _02079EC8: .word 0x00000404
 FUN_02079ECC: ; 0x02079ECC
 	push {r3-r5, lr}
 	add r4, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r5, r0, #0x0
 	mov r0, #0x0
 	add r1, r0, #0x0
@@ -337,7 +337,7 @@ FUN_02079ECC: ; 0x02079ECC
 	mov r1, #0x0
 	strh r1, [r0, #0x0]
 	add r0, r4, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x13
 	bl FUN_020168D0
 	mov r0, #0x1
diff --git a/arm9/asm/unk_020854E0.s b/arm9/asm/unk_020854E0.s
index b783b730..86ea2fee 100644
--- a/arm9/asm/unk_020854E0.s
+++ b/arm9/asm/unk_020854E0.s
@@ -395,11 +395,11 @@ FUN_020857D4: ; 0x020857D4
 	ldr r0, [r4, #0x0]
 	cmp r0, #0x0
 	beq _020857F4
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0x0
 	beq _020857F4
 	ldr r0, [r4, #0x0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	mov r0, #0x0
 	str r0, [r4, #0x0]
 	mov r0, #0x1
@@ -412,7 +412,7 @@ _020857F4:
 FUN_020857F8: ; 0x020857F8
 	push {r3-r5, lr}
 	add r4, r0, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #0x1
 	add r5, r0, #0x0
 	mov r0, #0x3
@@ -422,7 +422,7 @@ FUN_020857F8: ; 0x020857F8
 	add r0, r4, #0x0
 	mov r1, #0x1c
 	mov r2, #0x28
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0x0
 	mov r2, #0x1c
 	add r4, r0, #0x0
@@ -462,10 +462,10 @@ FUN_0208585C: ; 0x0208585C
 	push {r4-r6, lr}
 	add r6, r0, #0x0
 	add r5, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	add r0, r6, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r6, r0, #0x0
 	ldr r0, [r5, #0x0]
 	cmp r0, #0x4
@@ -491,7 +491,7 @@ _0208588E:
 	ldr r0, _02085994 ; =UNK_020FCAA8
 	ldr r1, [r4, #0x10]
 	ldr r2, [r4, #0x0]
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0xc]
 	mov r0, #0x1
 	str r0, [r5, #0x0]
@@ -582,7 +582,7 @@ _02085942:
 	ldr r0, _0208599C ; =UNK_020FCAB8
 	ldr r1, [r4, #0x8]
 	ldr r2, [r4, #0x0]
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0xc]
 	mov r0, #0x4
 	str r0, [r5, #0x0]
@@ -622,12 +622,12 @@ _0208599C: .word UNK_020FCAB8
 FUN_020859A0: ; 0x020859A0
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	ldr r0, [r4, #0x10]
 	bl FUN_0208578C
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r0, [r4, #0x0]
 	bl FUN_020168D0
 	mov r0, #0x1
diff --git a/arm9/asm/unk_020859C0.s b/arm9/asm/unk_020859C0.s
index 8f1aa043..efd11044 100644
--- a/arm9/asm/unk_020859C0.s
+++ b/arm9/asm/unk_020859C0.s
@@ -100,7 +100,7 @@ FUN_020859C0: ; 0x020859C0
 	ldr r1, _02085BA0 ; =0x0000042C
 	add r0, r5, #0x0
 	mov r2, #0x35
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _02085BA0 ; =0x0000042C
 	mov r1, #0x0
 	add r4, r0, #0x0
@@ -110,7 +110,7 @@ FUN_020859C0: ; 0x020859C0
 	lsl r1, r1, #0x4
 	str r0, [r4, r1]
 	add r0, r5, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #0x0]
 	mov r0, #0x35
 	bl AllocMonZeroed
@@ -304,7 +304,7 @@ _02085BAC: .word MOD62_022310CC
 FUN_02085BB0: ; 0x02085BB0
 	push {r3-r5, lr}
 	add r5, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5, #0x0]
 	add r4, r0, #0x0
 	cmp r1, #0x0
@@ -350,7 +350,7 @@ _02085C02:
 FUN_02085C08: ; 0x02085C08
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	mov r0, #0x1
 	mov r1, #0x0
@@ -476,7 +476,7 @@ FUN_02085C08: ; 0x02085C08
 	mov r0, #0x35
 	bl MOD62_02230F70
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	bl FUN_0201CD04
 	mov r0, #0x35
 	bl FUN_020168D0
diff --git a/arm9/asm/unk_02086084.s b/arm9/asm/unk_02086084.s
index 4945183c..c83c9aff 100644
--- a/arm9/asm/unk_02086084.s
+++ b/arm9/asm/unk_02086084.s
@@ -27,13 +27,13 @@ FUN_02086084: ; 0x02086084
 	add r0, r5, #0x0
 	mov r1, #0x80
 	mov r2, #0x47
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0x0
 	mov r2, #0x80
 	add r4, r0, #0x0
 	bl memset
 	add r0, r5, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #0x0]
 	ldr r0, [r0, #0x10]
 	bl FUN_02024FF4
@@ -105,7 +105,7 @@ _02086164: .word FUN_02086664
 FUN_02086168: ; 0x02086168
 	push {r3-r5, lr}
 	add r5, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5, #0x0]
 	add r4, r0, #0x0
 	cmp r1, #0x0
@@ -165,7 +165,7 @@ _020861D8: .word 0x000001EA
 FUN_020861DC: ; 0x020861DC
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	ldr r0, [r4, #0x38]
 	bl FUN_020223BC
@@ -217,7 +217,7 @@ FUN_020861DC: ; 0x020861DC
 	add r0, r4, #0x4
 	bl FUN_02086ED4
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x47
 	bl FUN_020168D0
 	mov r0, #0x1
diff --git a/arm9/asm/unk_02087D00.s b/arm9/asm/unk_02087D00.s
index 5676baf3..bf502fa3 100644
--- a/arm9/asm/unk_02087D00.s
+++ b/arm9/asm/unk_02087D00.s
@@ -183,11 +183,11 @@ FUN_02087E1C: ; 0x02087E1C
 	ldr r0, [r4, #0x0]
 	cmp r0, #0x0
 	beq _02087E3C
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0x0
 	beq _02087E3C
 	ldr r0, [r4, #0x0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	mov r0, #0x0
 	str r0, [r4, #0x0]
 	mov r0, #0x1
@@ -200,7 +200,7 @@ _02087E3C:
 FUN_02087E40: ; 0x02087E40
 	push {r3-r5, lr}
 	add r4, r0, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #0x1
 	add r5, r0, #0x0
 	mov r0, #0x3
@@ -210,7 +210,7 @@ FUN_02087E40: ; 0x02087E40
 	add r0, r4, #0x0
 	mov r1, #0x18
 	mov r2, #0x2c
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0x0
 	mov r2, #0x18
 	add r4, r0, #0x0
@@ -225,7 +225,7 @@ FUN_02087E40: ; 0x02087E40
 FUN_02087E74: ; 0x02087E74
 	push {r4, lr}
 	add r4, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4, #0x0]
 	cmp r1, #0x8
 	bhi _02087EE4
@@ -288,11 +288,11 @@ _02087EE4:
 FUN_02087EE8: ; 0x02087EE8
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	bl FUN_02087F08
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r0, [r4, #0x0]
 	bl FUN_020168D0
 	mov r0, #0x1
@@ -347,7 +347,7 @@ FUN_02087F50: ; 0x02087F50
 	ldr r0, _02087F64 ; =UNK_020FD15C
 	ldr r1, [r4, #0xc]
 	ldr r2, [r4, #0x0]
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x14]
 	mov r0, #0x1
 	pop {r4, pc}
@@ -401,7 +401,7 @@ _02087F86:
 	str r0, [r4, #0xc]
 	ldr r0, _02087FD0 ; =UNK_020F96DC
 	ldr r2, [r5, #0x0]
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r5, #0x14]
 	str r4, [r5, #0x10]
 	mov r0, #0x2
@@ -465,7 +465,7 @@ _02087FFE:
 	ldr r0, _02088058 ; =UNK_020FA6E8
 	ldr r2, [r5, #0x0]
 	add r1, r7, #0x0
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r5, #0x14]
 	str r4, [r5, #0x10]
 	mov r0, #0x3
@@ -553,7 +553,7 @@ FUN_020880A0: ; 0x020880A0
 	ldr r0, _02088108 ; =UNK_020FD16C
 	ldr r2, [r5, #0x0]
 	add r1, r4, #0x0
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r5, #0x14]
 	str r4, [r5, #0x10]
 	mov r0, #0x5
@@ -628,7 +628,7 @@ FUN_02088130: ; 0x02088130
 	ldr r0, _020881A8 ; =UNK_020FA6E8
 	ldr r2, [r5, #0x0]
 	add r1, r4, #0x0
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r5, #0x14]
 	str r4, [r5, #0x10]
 	mov r0, #0x7
diff --git a/arm9/asm/unk_02088858.s b/arm9/asm/unk_02088858.s
index dfc20769..5f71517a 100644
--- a/arm9/asm/unk_02088858.s
+++ b/arm9/asm/unk_02088858.s
@@ -91,7 +91,7 @@ FUN_020888DC: ; 0x020888DC
 	lsl r2, r2, #0xc
 	bl FUN_0201681C
 	add r0, r4, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #0x8]
 	mov r1, #0x31
 	bl FUN_02088898
diff --git a/arm9/asm/unk_0208898C.s b/arm9/asm/unk_0208898C.s
index e2243e5e..6fef7584 100644
--- a/arm9/asm/unk_0208898C.s
+++ b/arm9/asm/unk_0208898C.s
@@ -10,11 +10,11 @@ FUN_0208898C: ; 0x0208898C
 	ldr r0, [r4, #0x0]
 	cmp r0, #0x0
 	beq _020889AC
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0x0
 	beq _020889AC
 	ldr r0, [r4, #0x0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	mov r0, #0x0
 	str r0, [r4, #0x0]
 	mov r0, #0x1
@@ -27,7 +27,7 @@ _020889AC:
 FUN_020889B0: ; 0x020889B0
 	push {r3-r5, lr}
 	add r4, r0, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #0x1
 	add r5, r0, #0x0
 	mov r0, #0x3
@@ -37,7 +37,7 @@ FUN_020889B0: ; 0x020889B0
 	add r0, r4, #0x0
 	mov r1, #0x24
 	mov r2, #0x37
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0x0
 	mov r2, #0x24
 	add r4, r0, #0x0
@@ -67,10 +67,10 @@ FUN_02088A00: ; 0x02088A00
 	push {r4-r6, lr}
 	add r5, r0, #0x0
 	add r4, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0x0
 	add r0, r5, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r5, [r4, #0x0]
 	cmp r5, #0x4
 	bhi _02088A6A
@@ -131,10 +131,10 @@ _02088A74:
 FUN_02088A78: ; 0x02088A78
 	push {r4-r6, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0x0
 	add r0, r5, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r4, #0xc]
 	ldr r6, [r4, #0x0]
 	bl FreeToHeap
@@ -143,7 +143,7 @@ FUN_02088A78: ; 0x02088A78
 	mov r2, #0x24
 	bl MI_CpuFill8
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r6, #0x0
 	bl FUN_020168D0
 	mov r0, #0x1
diff --git a/arm9/asm/unk_02088AAC.s b/arm9/asm/unk_02088AAC.s
index 30ea796e..65ce7a60 100644
--- a/arm9/asm/unk_02088AAC.s
+++ b/arm9/asm/unk_02088AAC.s
@@ -83,7 +83,7 @@ FUN_02088AFC: ; 0x02088AFC
 	add r0, r2, #0x0
 	ldr r2, [r4, #0x0]
 	add r1, r4, #0x0
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x1c]
 	mov r0, #0x2
 	add sp, #0x10
@@ -153,7 +153,7 @@ _02088B7C:
 	ldr r2, [r5, #0x0]
 	add r0, sp, #0x0
 	add r1, r4, #0x0
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r5, #0x1c]
 	str r4, [r5, #0x18]
 	mov r0, #0x1
@@ -304,7 +304,7 @@ _02088C9A:
 	ldr r1, [r5, #0x18]
 	ldr r2, [r5, #0x0]
 	add r0, sp, #0x8
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r5, #0x1c]
 	mov r0, #0x3
 	add sp, #0x18
diff --git a/arm9/asm/unk_02089498.s b/arm9/asm/unk_02089498.s
index 20b958ad..3962942c 100644
--- a/arm9/asm/unk_02089498.s
+++ b/arm9/asm/unk_02089498.s
@@ -46,7 +46,7 @@ FUN_02089498: ; 0x02089498
 	add r0, r5, #0x0
 	mov r1, #0x38
 	mov r2, #0x58
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0x0
 	mov r2, #0x38
 	add r4, r0, #0x0
@@ -56,7 +56,7 @@ FUN_02089498: ; 0x02089498
 	mov r0, #0x0
 	str r0, [r4, #0x4]
 	add r0, r5, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #0x8]
 	str r0, [r4, #0x30]
 	mov r0, #0x1
@@ -68,7 +68,7 @@ FUN_020894D4: ; 0x020894D4
 	push {r3-r6, lr}
 	sub sp, #0xc
 	add r5, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5, #0x0]
 	add r4, r0, #0x0
 	mov r6, #0x0
@@ -192,10 +192,10 @@ _020895EC: .word FUN_02089610
 FUN_020895F0: ; 0x020895F0
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r4, [r0, #0x0]
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r4, #0x0
 	bl FUN_020168D0
 	mov r0, #0x0
diff --git a/arm9/asm/unk_02089960.s b/arm9/asm/unk_02089960.s
index d7d6fc47..2154cdf9 100644
--- a/arm9/asm/unk_02089960.s
+++ b/arm9/asm/unk_02089960.s
@@ -42,7 +42,7 @@ FUN_02089960: ; 0x02089960
 	add r0, r5, #0x0
 	mov r1, #0x3c
 	mov r2, #0x58
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0x0
 	mov r2, #0x3c
 	add r4, r0, #0x0
@@ -52,7 +52,7 @@ FUN_02089960: ; 0x02089960
 	mov r0, #0x0
 	str r0, [r4, #0x4]
 	add r0, r5, #0x0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #0x8]
 	str r0, [r4, #0x34]
 	mov r0, #0x1
@@ -63,7 +63,7 @@ FUN_02089960: ; 0x02089960
 FUN_0208999C: ; 0x0208999C
 	push {r4-r6, lr}
 	add r5, r1, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5, #0x0]
 	add r6, r0, #0x0
 	mov r4, #0x0
@@ -136,15 +136,15 @@ _02089A3C: .word 0x04001000
 FUN_02089A40: ; 0x02089A40
 	push {r3-r5, lr}
 	add r5, r0, #0x0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r4, [r0, #0x0]
 	add r0, r5, #0x0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r4, #0x0
 	bl FUN_020168D0
 	ldr r0, _02089A64 ; =SDK_OVERLAY_MODULE_83_ID
 	ldr r1, _02089A68 ; =MOD83_0223A360
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #0x1
 	pop {r3-r5, pc}
 	nop
diff --git a/arm9/global.inc b/arm9/global.inc
index 1fd91f17..4fdc7064 100644
--- a/arm9/global.inc
+++ b/arm9/global.inc
@@ -184,7 +184,7 @@
 .extern FSi_TranslateCommand
 .extern FUNRTC_Init
 .extern FUN_02000DF4
-.extern FUN_02000E7C
+.extern RegisterMainOverlay
 .extern FUN_02000EE8
 .extern FUN_02000F18
 .extern HandleDSLidAction
@@ -375,13 +375,13 @@
 .extern FUN_02005F14
 .extern FUN_020061E8
 .extern FUN_0200621C
-.extern FUN_02006234
-.extern FUN_02006260
-.extern FUN_02006268
-.extern FUN_02006278
-.extern FUN_0200627C
-.extern FUN_0200628C
-.extern FUN_02006290
+.extern OverlayManager_new
+.extern OverlayManager_delete
+.extern OverlayManager_CreateAndGetData
+.extern OverlayManager_GetData
+.extern OverlayManager_FreeData
+.extern OverlayManager_GetField18
+.extern OverlayManager_Run
 .extern AllocAtEndAndReadWholeNarcMemberByIdPair
 .extern ReadFromNarcMemberByIdPair
 .extern AllocAndReadFromNarcMemberByIdPair
diff --git a/arm9/modules/05/asm/mod05_021D74E0.s b/arm9/modules/05/asm/mod05_021D74E0.s
index 047e643f..ad9d0939 100644
--- a/arm9/modules/05/asm/mod05_021D74E0.s
+++ b/arm9/modules/05/asm/mod05_021D74E0.s
@@ -23,7 +23,7 @@ MOD05_021D7504: ; 0x021D7504
 	push {r4, r5, r6, lr}
 	add r5, r1, #0
 	mov r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #3
@@ -179,7 +179,7 @@ _021D7678: .word SDK_OVERLAY_MODULE_06_ID
 	thumb_func_start MOD05_021D767C
 MOD05_021D767C: ; 0x021D767C
 	push {r4, lr}
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0
 	bl MOD05_021D7864
 	cmp r0, #0
@@ -212,7 +212,7 @@ _021D76BA:
 MOD05_021D76C0: ; 0x021D76C0
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0
 	ldr r1, [r4, #0x24]
 	bl MOD05_021EE52C
diff --git a/arm9/modules/11/asm/module_11_thumb1.s b/arm9/modules/11/asm/module_11_thumb1.s
index a5298ae9..c24d5e86 100644
--- a/arm9/modules/11/asm/module_11_thumb1.s
+++ b/arm9/modules/11/asm/module_11_thumb1.s
@@ -9,7 +9,7 @@ MOD11_0222D5C0: ; 0x0222D5C0
 	sub sp, #0x28
 	add r4, r1, #0
 	add r6, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, [r4]
 	add r5, r0, #0
 	cmp r1, #0xf
@@ -655,7 +655,7 @@ _0222DB4C: .word MOD11_0222F01C
 MOD11_0222DB50: ; 0x0222DB50
 	push {r3, r4, r5, r6, r7, lr}
 	sub sp, #0x30
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl FUN_020222F0
 	add r5, r0, #0
@@ -1076,7 +1076,7 @@ _0222DF48: .word 0x00002434
 	thumb_func_start MOD11_0222DF4C
 MOD11_0222DF4C: ; 0x0222DF4C
 	push {r4, r5, r6, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, _0222DF9C ; =0x000023F8
 	add r4, r0, #0
 	ldrb r1, [r4, r1]
@@ -1122,10 +1122,10 @@ _0222DFA0: .word 0x000023FA
 MOD11_0222DFA4: ; 0x0222DFA4
 	push {r3, r4, r5, r6, r7, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r7, r0, #0
 	mov r0, #0
 	add r1, r0, #0
diff --git a/arm9/modules/11/asm/module_11_thumb2.s b/arm9/modules/11/asm/module_11_thumb2.s
index ab70294a..1154f46d 100644
--- a/arm9/modules/11/asm/module_11_thumb2.s
+++ b/arm9/modules/11/asm/module_11_thumb2.s
@@ -10,7 +10,7 @@ MOD11_0222F29C: ; 0x0222F29C
 	add r4, r1, #0
 	ldr r1, _0222F4C0 ; =0x00001028
 	mov r2, #5
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r5, r0, #0
 	ldr r0, _0222F4C4 ; =0x00001020
 	str r4, [r5]
@@ -255,7 +255,7 @@ _0222F4E0: .word 0x00001024
 MOD11_0222F4E4: ; 0x0222F4E4
 	push {r4, r5, r6, r7, lr}
 	sub sp, #0xc
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r1, [r4, #4]
 	mov r0, #5
@@ -795,7 +795,7 @@ _0222F938: .word 0x00001024
 	thumb_func_start MOD11_0222F93C
 MOD11_0222F93C: ; 0x0222F93C
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	mov r0, #0
 	add r1, r0, #0
@@ -829,10 +829,10 @@ MOD11_0222F988: ; 0x0222F988
 	ldr r1, _0222FAB4 ; =0x00002444
 	add r5, r0, #0
 	mov r2, #5
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r6, r0, #0
 	bl FUN_02031190
 	lsl r0, r0, #0x18
@@ -979,7 +979,7 @@ _0222FAB8: .word SDK_OVERLAY_MODULE_07_ID
 	thumb_func_start MOD11_0222FABC
 MOD11_0222FABC: ; 0x0222FABC
 	push {r3, r4, r5, r6, r7, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	mov r0, #7
 	lsl r0, r0, #6
@@ -1019,10 +1019,10 @@ _0222FAFE:
 MOD11_0222FB04: ; 0x0222FB04
 	push {r3, r4, r5, r6, r7, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	bl FUN_02031190
 	lsl r0, r0, #0x18
 	lsr r7, r0, #0x18
@@ -1165,7 +1165,7 @@ _0222FC2A:
 	thumb_func_start MOD11_0222FC38
 MOD11_0222FC38: ; 0x0222FC38
 	push {r3, r4, r5, r6, r7, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	mov r0, #7
 	lsl r0, r0, #6
@@ -1205,7 +1205,7 @@ _0222FC7A:
 MOD11_0222FC80: ; 0x0222FC80
 	push {r3, r4, r5, r6, r7, lr}
 	sub sp, #0x10
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r7, r0, #0
 	bl FUN_02031190
 	lsl r0, r0, #0x18
@@ -1434,7 +1434,7 @@ _0222FE54: .word SDK_OVERLAY_MODULE_07_ID
 	thumb_func_start MOD11_0222FE58
 MOD11_0222FE58: ; 0x0222FE58
 	push {r4, r5, r6, lr}
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x66
 	lsl r1, r1, #2
 	ldr r6, [r0, r1]
@@ -25682,7 +25682,7 @@ _0223BBEE:
 	ldr r0, _0223BF18 ; =UNK_020FA5FC
 	add r1, r5, #0
 	mov r2, #5
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x50]
 	mov r0, #0x15
 	str r0, [r4, #0x28]
@@ -25697,7 +25697,7 @@ _0223BBEE:
 	pop {r3, r4, r5, r6, r7, pc}
 _0223BC38:
 	ldr r0, [r4, #0x50]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _0223BC88
 	ldr r2, [r4, #4]
@@ -25718,7 +25718,7 @@ _0223BC62:
 	add r0, r5, #0
 	bl FUN_02077AC4
 	ldr r0, [r4, #0x50]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	ldr r0, [r4]
 	mov r1, #2
 	bl MOD11_02231338
diff --git a/arm9/modules/12/asm/module_12.s b/arm9/modules/12/asm/module_12.s
index 122cd442..2d42f701 100644
--- a/arm9/modules/12/asm/module_12.s
+++ b/arm9/modules/12/asm/module_12.s
@@ -44,7 +44,7 @@ MOD12_0222D5C0: ; 0x0222D5C0
 	ldr r1, _0222D868 ; =0x00001658
 	add r0, r5, #0
 	mov r2, #0x15
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _0222D868 ; =0x00001658
 	mov r1, #0
 	add r4, r0, #0
@@ -53,7 +53,7 @@ MOD12_0222D5C0: ; 0x0222D5C0
 	bl MOD12_022312D8
 	str r0, [r4, #8]
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x5b
 	str r0, [r4]
 	lsl r1, r1, #2
@@ -299,7 +299,7 @@ MOD12_0222D89C: ; 0x0222D89C
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4]
 	bl FUN_02082878
@@ -430,7 +430,7 @@ _0222D9AC: .word 0x00001650
 MOD12_0222D9B0: ; 0x0222D9B0
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl FUN_02012EAC
 	ldr r0, [r4, #0x2c]
@@ -515,7 +515,7 @@ MOD12_0222D9B0: ; 0x0222D9B0
 	bl MOD12_02231378
 	bl FUN_0201CD04
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
@@ -3179,7 +3179,7 @@ MOD12_0222EF04: ; 0x0222EF04
 	ldr r1, _0222F168 ; =0x00000F68
 	add r0, r4, #0
 	mov r2, #0x16
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _0222F168 ; =0x00000F68
 	mov r1, #0
 	add r5, r0, #0
@@ -3188,7 +3188,7 @@ MOD12_0222EF04: ; 0x0222EF04
 	bl MOD12_022312D8
 	str r0, [r5, #8]
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x5b
 	str r0, [r5]
 	lsl r1, r1, #2
@@ -3405,7 +3405,7 @@ MOD12_0222F19C: ; 0x0222F19C
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4]
 	bl FUN_02082878
@@ -3588,7 +3588,7 @@ _0222F320: .word 0x00000F1C
 MOD12_0222F324: ; 0x0222F324
 	push {r3, r4, r5, r6, r7, lr}
 	str r0, [sp]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl FUN_02012EAC
 	add r0, r4, #0
@@ -3680,7 +3680,7 @@ _0222F3AE:
 	bl MOD12_02231378
 	bl FUN_0201CD04
 	ldr r0, [sp]
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
@@ -5019,7 +5019,7 @@ MOD12_0222FE4C: ; 0x0222FE4C
 	ldr r1, _022300EC ; =0x00001BF4
 	add r0, r4, #0
 	mov r2, #0x17
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _022300EC ; =0x00001BF4
 	mov r1, #0
 	add r5, r0, #0
@@ -5028,7 +5028,7 @@ MOD12_0222FE4C: ; 0x0222FE4C
 	bl MOD12_022312D8
 	str r0, [r5, #0x10]
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x5b
 	str r0, [r5]
 	lsl r1, r1, #2
@@ -5272,7 +5272,7 @@ MOD12_02230128: ; 0x02230128
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4]
 	bl FUN_02082878
@@ -5402,7 +5402,7 @@ _02230238: .word 0x00001BF0
 MOD12_0223023C: ; 0x0223023C
 	push {r3, r4, r5, r6, r7, lr}
 	add r7, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0xc]
 	bl FUN_020133C8
@@ -5524,7 +5524,7 @@ _02230296:
 	bl MOD12_02231378
 	bl FUN_0201CD04
 	add r0, r7, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
@@ -41107,7 +41107,7 @@ MOD12_02241210: ; 0x02241210
 	add r0, r4, #0
 	lsl r1, r1, #6
 	mov r2, #0x18
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x4a
 	mov r1, #0
 	lsl r2, r2, #6
@@ -41117,7 +41117,7 @@ MOD12_02241210: ; 0x02241210
 	bl MOD12_022312D8
 	str r0, [r5, #0xc]
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x5b
 	str r0, [r5]
 	lsl r1, r1, #2
@@ -41326,7 +41326,7 @@ MOD12_02241490: ; 0x02241490
 	push {r3, r4, r5, lr}
 	sub sp, #8
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4]
 	bl FUN_02082878
@@ -41456,7 +41456,7 @@ _022415A4: .word 0x0000127C
 MOD12_022415A8: ; 0x022415A8
 	push {r3, r4, r5, r6, r7, lr}
 	add r7, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl FUN_02012EAC
 	add r0, r4, #0
@@ -41561,7 +41561,7 @@ _022415D4:
 	bl MOD12_02231378
 	bl FUN_0201CD04
 	add r0, r7, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r2, #1
 	lsl r2, r2, #0x1a
 	ldr r1, [r2]
diff --git a/arm9/modules/14/asm/module_14.s b/arm9/modules/14/asm/module_14.s
index e1232e0b..ff3ae9eb 100644
--- a/arm9/modules/14/asm/module_14.s
+++ b/arm9/modules/14/asm/module_14.s
@@ -21,11 +21,11 @@ MOD14_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	lsl r1, r1, #2
 	mov r2, #9
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	beq _021D7544
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r1, r0, #0
 	add r0, r4, #0
 	bl MOD14_021DB220
@@ -56,7 +56,7 @@ _021D7548: .word MOD14_021D7680
 	thumb_func_start MOD14_021D754C
 MOD14_021D754C: ; 0x021D754C
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r1, #0x6b
 	add r4, r0, #0
 	lsl r1, r1, #2
@@ -110,7 +110,7 @@ _021D75B4: .word gMain
 	thumb_func_start MOD14_021D75B8
 MOD14_021D75B8: ; 0x021D75B8
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r1, #0x49
 	add r4, r0, #0
 	lsl r1, r1, #2
@@ -5564,7 +5564,7 @@ _021DA1FE:
 	ldr r0, _021DA2C0 ; =MOD14_020FA5FC
 	ldr r1, [r4, r1]
 	mov r2, #9
-	bl FUN_02006234
+	bl OverlayManager_new
 	mov r1, #0x21
 	lsl r1, r1, #4
 	str r0, [r4, r1]
@@ -5576,7 +5576,7 @@ _021DA256:
 	mov r0, #0x21
 	lsl r0, r0, #4
 	ldr r0, [r4, r0]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _021DA2BC
 	mov r0, #0x12
@@ -5587,7 +5587,7 @@ _021DA256:
 	mov r0, #0x21
 	lsl r0, r0, #4
 	ldr r0, [r4, r0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	mov r2, #0xf
 	mov r0, #3
 	mov r1, #0xa
@@ -5666,7 +5666,7 @@ _021DA2F2:
 	ldr r0, _021DA394 ; =UNK_020FA6E8
 	add r1, r5, r1
 	mov r2, #9
-	bl FUN_02006234
+	bl OverlayManager_new
 	mov r1, #0x21
 	lsl r1, r1, #4
 	str r0, [r5, r1]
@@ -5678,7 +5678,7 @@ _021DA334:
 	mov r0, #0x21
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _021DA390
 	mov r0, #0x12
@@ -5688,7 +5688,7 @@ _021DA334:
 	mov r0, #0x21
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	mov r2, #0xf
 	mov r0, #3
 	mov r1, #0xa
@@ -5828,7 +5828,7 @@ _021DA41E:
 	ldr r0, _021DA5E0 ; =MOD75_021EC68C
 	ldr r1, [r4, r1]
 	mov r2, #9
-	bl FUN_02006234
+	bl OverlayManager_new
 	mov r1, #0x21
 	lsl r1, r1, #4
 	str r0, [r4, r1]
@@ -5840,7 +5840,7 @@ _021DA488:
 	mov r0, #0x21
 	lsl r0, r0, #4
 	ldr r0, [r4, r0]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	bne _021DA498
 _021DA496:
@@ -5855,7 +5855,7 @@ _021DA498:
 	mov r0, #0x21
 	lsl r0, r0, #4
 	ldr r0, [r4, r0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	mov r0, #0x85
 	lsl r0, r0, #2
 	ldr r0, [r4, r0]
diff --git a/arm9/modules/15/asm/module_15.s b/arm9/modules/15/asm/module_15.s
index ea50637f..bd0ca04e 100644
--- a/arm9/modules/15/asm/module_15.s
+++ b/arm9/modules/15/asm/module_15.s
@@ -39,7 +39,7 @@ _021D74F2:
 	str r0, [r4]
 	b _021D7552
 _021D752A:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0x14]
 	bl MOD15_021D8958
@@ -66,7 +66,7 @@ _021D7552:
 	thumb_func_start MOD15_021D7558
 MOD15_021D7558: ; 0x021D7558
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, _021D7594 ; =gMain
 	ldr r1, [r0, #0x48]
@@ -166,7 +166,7 @@ _021D7604:
 MOD15_021D7608: ; 0x021D7608
 	push {r4, lr}
 	add r4, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r1, r4, #0
 	bl MOD15_021D7774
 	mov r0, #0x22
@@ -183,10 +183,10 @@ MOD15_021D7628: ; 0x021D7628
 	add r5, r0, #0
 	mov r1, #0x68
 	mov r2, #0x22
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4]
 	bl FUN_0208540C
 	str r0, [r4, #4]
@@ -352,7 +352,7 @@ MOD15_021D7774: ; 0x021D7774
 	ldr r0, [r5, #0x18]
 	bl FUN_02088F4C
 	add r0, r4, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	pop {r3, r4, r5, pc}
 
 	thumb_func_start MOD15_021D7794
diff --git a/arm9/modules/16/asm/module_16.s b/arm9/modules/16/asm/module_16.s
index 386eea1e..515f1d08 100644
--- a/arm9/modules/16/asm/module_16.s
+++ b/arm9/modules/16/asm/module_16.s
@@ -20,7 +20,7 @@ MOD16_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	mov r1, #4
 	mov r2, #0x25
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	bne _021D750E
 	bl ErrorHandling
@@ -34,7 +34,7 @@ _021D750E:
 	mov r1, #0x25
 	bl FUN_0201C24C
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r5, r0, #0
 	ldr r0, _021D7584 ; =MOD16_021D7650
 	add r1, r4, #0
@@ -83,7 +83,7 @@ _021D7584: .word MOD16_021D7650
 MOD16_021D7588: ; 0x021D7588
 	push {r3, r4, r5, lr}
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4]
 	add r5, r0, #0
 	cmp r1, #3
@@ -154,7 +154,7 @@ _021D7610: .word 0x04001050
 MOD16_021D7614: ; 0x021D7614
 	push {r4, lr}
 	add r4, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
@@ -166,7 +166,7 @@ _021D7630:
 	bl MOD16_021D7A10
 	bl FUN_0201C29C
 	add r0, r4, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x25
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/17/asm/module_17.s b/arm9/modules/17/asm/module_17.s
index e258bcc9..52bc0583 100644
--- a/arm9/modules/17/asm/module_17.s
+++ b/arm9/modules/17/asm/module_17.s
@@ -2051,7 +2051,7 @@ MOD17_021D83E4: ; 0x021D83E4
 	ldr r1, _021D84D8 ; =0x000006D8
 	add r0, r4, #0
 	mov r2, #0xd
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D84D8 ; =0x000006D8
 	mov r1, #0
 	add r5, r0, #0
@@ -2061,7 +2061,7 @@ MOD17_021D83E4: ; 0x021D83E4
 	bl FUN_02015F10
 	bl FUN_02015F1C
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0
 	ldr r1, [r4, #0xc]
 	ldr r0, _021D84E0 ; =0x000006C8
@@ -2150,11 +2150,11 @@ MOD17_021D84F0: ; 0x021D84F0
 	sub sp, #0xc
 	add r7, r0, #0
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r7, #0
 	mov r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, [r5]
 	cmp r1, #0xc
 	bhi _021D85BA
@@ -2433,10 +2433,10 @@ _021D8734: .word 0x0000048C
 MOD17_021D8738: ; 0x021D8738
 	push {r4, r5, r6, lr}
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r5, r0, #0
 	ldr r0, _021D8808 ; =0x000006AC
 	ldr r0, [r4, r0]
@@ -2509,7 +2509,7 @@ _021D8780:
 	bl ErrorHandling
 _021D87F0:
 	add r0, r6, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0xd
 	bl FUN_020168D0
 	mov r0, #0xe
@@ -2541,7 +2541,7 @@ MOD17_021D8818: ; 0x021D8818
 	ldr r1, _021D897C ; =0x000006D8
 	add r0, r5, #0
 	mov r2, #0xd
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D897C ; =0x000006D8
 	mov r1, #0
 	add r4, r0, #0
@@ -2551,7 +2551,7 @@ MOD17_021D8818: ; 0x021D8818
 	bl FUN_02015F10
 	bl FUN_02015F1C
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r5, r0, #0
 	ldr r0, [r5, #0xc]
 	ldr r1, _021D8984 ; =0x000006B4
@@ -2692,7 +2692,7 @@ MOD17_021D8998: ; 0x021D8998
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0xc
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4]
 	add r5, r0, #0
 	mov r6, #0
@@ -3061,10 +3061,10 @@ _021D8C98: .word 0xFFFF1FFF
 MOD17_021D8C9C: ; 0x021D8C9C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r2, _021D8D50 ; =0x000006B4
 	add r3, r0, #0
 	mov r1, #0xfa
@@ -3117,7 +3117,7 @@ MOD17_021D8C9C: ; 0x021D8C9C
 	bl ErrorHandling
 _021D8D30:
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0xd
 	bl FUN_020168D0
 	mov r0, #0xe
@@ -13790,7 +13790,7 @@ MOD17_021DDB58: ; 0x021DDB58
 	add r0, r5, #0
 	lsl r1, r1, #2
 	mov r2, #0xd
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x65
 	mov r1, #0
 	lsl r2, r2, #2
@@ -13801,7 +13801,7 @@ MOD17_021DDB58: ; 0x021DDB58
 	bl FUN_02015F10
 	bl FUN_02015F1C
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r5, r0, #0
 	ldr r0, [r5, #8]
 	cmp r0, #0
@@ -13872,7 +13872,7 @@ MOD17_021DDC30: ; 0x021DDC30
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r5, r0, #0
 	bl FUN_020222AC
 	bl FUN_020B02C8
@@ -13971,7 +13971,7 @@ _021DDCF0: .word gMain
 MOD17_021DDCF4: ; 0x021DDCF4
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0x10]
 	bl MOD17_021DD540
@@ -13988,7 +13988,7 @@ MOD17_021DDCF4: ; 0x021DDCF4
 	bl FUN_02015F10
 	bl FUN_02015F1C
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0xd
 	bl FUN_020168D0
 	mov r0, #0xe
diff --git a/arm9/modules/52/asm/module_52.s b/arm9/modules/52/asm/module_52.s
index 6858197f..55bb6ed3 100644
--- a/arm9/modules/52/asm/module_52.s
+++ b/arm9/modules/52/asm/module_52.s
@@ -20,7 +20,7 @@ MOD52_021D74E0: ; 0x021D74E0
 	thumb_func_start MOD52_021D74F8
 MOD52_021D74F8: ; 0x021D74F8
 	push {r3, lr}
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, [r0, #8]
 	mov r0, #0x4d
 	bl MOD52_021D769C
@@ -37,7 +37,7 @@ MOD52_021D750C: ; 0x021D750C
 	mov r0, #0
 	ldr r1, _021D7524 ; =UNK_020FD144
 	mvn r0, r0
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #1
 	pop {r3, pc}
 	nop
@@ -61,7 +61,7 @@ MOD52_021D7528: ; 0x021D7528
 	thumb_func_start MOD52_021D7540
 MOD52_021D7540: ; 0x021D7540
 	push {r4, lr}
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r4, [r0, #8]
 	mov r0, #0x4d
 	add r1, r4, #0
@@ -82,7 +82,7 @@ MOD52_021D7560: ; 0x021D7560
 	mov r0, #0
 	ldr r1, _021D7578 ; =UNK_020F2B7C
 	mvn r0, r0
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #1
 	pop {r3, pc}
 	nop
@@ -106,7 +106,7 @@ MOD52_021D757C: ; 0x021D757C
 	thumb_func_start MOD52_021D7594
 MOD52_021D7594: ; 0x021D7594
 	push {r3, r4, r5, lr}
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r4, [r0, #8]
 	add r0, r4, #0
 	bl FUN_02023788
@@ -148,7 +148,7 @@ MOD52_021D75E8: ; 0x021D75E8
 	mov r0, #0
 	ldr r1, _021D7600 ; =UNK_020F2B8C
 	mvn r0, r0
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #1
 	pop {r3, pc}
 	nop
diff --git a/arm9/modules/53/asm/module_53.s b/arm9/modules/53/asm/module_53.s
index 23ad97c5..5b38d781 100644
--- a/arm9/modules/53/asm/module_53.s
+++ b/arm9/modules/53/asm/module_53.s
@@ -41,7 +41,7 @@ _021D74F6:
 	ldr r1, _021D7640 ; =0x0000940C
 	add r0, r6, #0
 	mov r2, #0x27
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D7640 ; =0x0000940C
 	mov r1, #0
 	add r4, r0, #0
@@ -82,7 +82,7 @@ _021D74F6:
 	add r3, r0, #0
 	bl FUN_0200E1D0
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #8]
 	add r0, r4, #0
 	bl MOD53_021D7B60
@@ -136,7 +136,7 @@ _021D761A:
 	str r0, [r5]
 	b _021D7630
 _021D7622:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0
 	str r0, [r5]
 	add sp, #0xc
@@ -160,7 +160,7 @@ _021D7650: .word 0xFFFF7FFF
 MOD53_021D7654: ; 0x021D7654
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl FUN_02031190
 	cmp r0, #0
@@ -292,10 +292,10 @@ MOD53_021D7764: ; 0x021D7764
 	push {r3, r4, r5, r6, r7, lr}
 	add r5, r0, #0
 	add r7, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0
 	ldr r0, [r7]
 	cmp r0, #3
@@ -412,7 +412,7 @@ _021D786E:
 	ldr r0, [r6, #8]
 	bl FreeToHeap
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
diff --git a/arm9/modules/54/asm/module_54.s b/arm9/modules/54/asm/module_54.s
index cc365fa2..5dd265c7 100644
--- a/arm9/modules/54/asm/module_54.s
+++ b/arm9/modules/54/asm/module_54.s
@@ -42,7 +42,7 @@ _021D74F6:
 	ldr r1, _021D7638 ; =0x00004A60
 	add r0, r6, #0
 	mov r2, #0x33
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D7638 ; =0x00004A60
 	mov r1, #0
 	add r4, r0, #0
@@ -51,7 +51,7 @@ _021D74F6:
 	bl FUN_02016B94
 	str r0, [r4]
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #8]
 	ldr r1, [r0]
 	ldr r0, _021D763C ; =0x00004A38
@@ -133,7 +133,7 @@ _021D75F4:
 	str r0, [r5]
 	b _021D7628
 _021D761A:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0
 	str r0, [r5]
 	add sp, #0xc
@@ -157,7 +157,7 @@ _021D7648: .word MOD54_021D77E8
 MOD54_021D764C: ; 0x021D764C
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl FUN_02031190
 	cmp r0, #0
@@ -276,7 +276,7 @@ _021D773C: .word 0x00010300
 MOD54_021D7740: ; 0x021D7740
 	push {r3, r4, r5, r6, r7, lr}
 	str r0, [sp]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	ldr r0, [r6, #0x20]
 	bl FUN_0200CAB4
@@ -321,7 +321,7 @@ _021D776C:
 	add r0, r6, #0
 	bl MOD54_021D7A34
 	ldr r0, [sp]
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r2, _021D77E4 ; =0x04000304
 	ldrh r1, [r2]
 	lsr r0, r2, #0xb
diff --git a/arm9/modules/55/asm/module_55.s b/arm9/modules/55/asm/module_55.s
index e0ada2b4..d6b9b522 100644
--- a/arm9/modules/55/asm/module_55.s
+++ b/arm9/modules/55/asm/module_55.s
@@ -93,13 +93,13 @@ _021D7580:
 	ldr r1, _021D7610 ; =0x0000041C
 	add r0, r6, #0
 	mov r2, #0x34
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D7610 ; =0x0000041C
 	mov r1, #0
 	add r4, r0, #0
 	bl MI_CpuFill8
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #8]
 	add r0, r4, #0
 	bl MOD55_021D7994
@@ -127,7 +127,7 @@ _021D7580:
 	str r0, [r5]
 	b _021D760A
 _021D75FC:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0
 	str r0, [r5]
 	add sp, #0xc
@@ -168,13 +168,13 @@ _021D7628:
 	ldr r1, _021D76B8 ; =0x0000041C
 	add r0, r6, #0
 	mov r2, #0x34
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D76B8 ; =0x0000041C
 	mov r1, #0
 	add r4, r0, #0
 	bl MI_CpuFill8
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #8]
 	add r0, r4, #0
 	bl MOD55_021D7994
@@ -204,7 +204,7 @@ _021D7628:
 	str r0, [r5]
 	b _021D76B2
 _021D76A4:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0
 	str r0, [r5]
 	add sp, #0xc
@@ -222,7 +222,7 @@ _021D76B8: .word 0x0000041C
 MOD55_021D76BC: ; 0x021D76BC
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #0
@@ -341,13 +341,13 @@ MOD55_021D778C: ; 0x021D778C
 MOD55_021D77AC: ; 0x021D77AC
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD55_021D778C
 	add r0, r4, #0
 	bl MOD55_021D7A38
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x34
 	bl FUN_020168D0
 	mov r0, #1
@@ -1780,7 +1780,7 @@ MOD55_021D8320: ; 0x021D8320
 	ldr r0, _021D836C ; =UNK_020FA5FC
 	ldr r1, [r5]
 	mov r2, #0x34
-	bl FUN_02006234
+	bl OverlayManager_new
 	mov r1, #0x3d
 	lsl r1, r1, #4
 	str r0, [r5, r1]
@@ -1803,13 +1803,13 @@ MOD55_021D8370: ; 0x021D8370
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
 	add r4, r1, #0
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _021D83FC
 	mov r0, #0x3d
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	ldr r1, [r5]
 	ldr r0, [r1, #0x14]
 	cmp r0, #0
@@ -1880,7 +1880,7 @@ MOD55_021D8404: ; 0x021D8404
 	ldr r0, _021D843C ; =UNK_020FA5FC
 	ldr r1, [r5]
 	mov r2, #0x34
-	bl FUN_02006234
+	bl OverlayManager_new
 	mov r1, #0x3d
 	lsl r1, r1, #4
 	str r0, [r5, r1]
@@ -1902,13 +1902,13 @@ MOD55_021D8440: ; 0x021D8440
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
 	add r4, r1, #0
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _021D84C2
 	mov r0, #0x3d
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	add r0, r5, #0
 	ldr r1, [r5]
 	add r0, #0xd8
@@ -5068,7 +5068,7 @@ MOD55_021D9E40: ; 0x021D9E40
 	ldr r0, _021D9EC4 ; =UNK_020FA5FC
 	ldr r1, [r4]
 	mov r2, #0x34
-	bl FUN_02006234
+	bl OverlayManager_new
 	mov r1, #0x3d
 	lsl r1, r1, #4
 	str r0, [r4, r1]
@@ -5112,13 +5112,13 @@ MOD55_021D9EC8: ; 0x021D9EC8
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
 	add r4, r1, #0
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _021D9F68
 	mov r0, #0x3d
 	lsl r0, r0, #4
 	ldr r0, [r5, r0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	ldr r1, [r5]
 	ldr r0, [r1, #0x14]
 	cmp r0, #0
diff --git a/arm9/modules/56/asm/module_56.s b/arm9/modules/56/asm/module_56.s
index 197bf84c..5bf21ef0 100644
--- a/arm9/modules/56/asm/module_56.s
+++ b/arm9/modules/56/asm/module_56.s
@@ -331,7 +331,7 @@ MOD56_02212084: ; 0x02212084
 	beq _0221214E
 	b _0221215C
 _02212098:
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r6, r0, #0
 	ldr r0, [r6, #4]
 	cmp r0, #1
@@ -353,7 +353,7 @@ _022120BE:
 	add r0, r4, #0
 	lsl r1, r1, #4
 	mov r2, #0x36
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x3f
 	mov r1, #0
 	lsl r2, r2, #4
@@ -413,7 +413,7 @@ _02212146:
 	str r0, [r5]
 	b _0221215C
 _0221214E:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0
 	str r0, [r5]
 	add sp, #0xc
@@ -430,7 +430,7 @@ _0221215C:
 MOD56_02212164: ; 0x02212164
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #0
@@ -537,11 +537,11 @@ _022121EC:
 MOD56_02212240: ; 0x02212240
 	push {r4, r5, r6, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD56_022121C4
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r6, r0, #0
 	mov r0, #0xed
 	lsl r0, r0, #2
@@ -562,7 +562,7 @@ _02212274:
 	add r0, r4, #0
 	bl MOD56_022124E4
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x36
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/57/asm/module_57.s b/arm9/modules/57/asm/module_57.s
index f317d49f..64319ede 100644
--- a/arm9/modules/57/asm/module_57.s
+++ b/arm9/modules/57/asm/module_57.s
@@ -37,13 +37,13 @@ MOD57_021D74E0: ; 0x021D74E0
 	ldr r1, _021D76F0 ; =0x00003320
 	add r0, r5, #0
 	mov r2, #0x19
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D76F0 ; =0x00003320
 	mov r1, #0
 	add r4, r0, #0
 	bl memset
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r1, r4, #0
 	add r1, #0xb4
 	str r0, [r1]
@@ -259,7 +259,7 @@ MOD57_021D7714: ; 0x021D7714
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #4
@@ -536,7 +536,7 @@ _021D7940: .word 0x000030E4
 MOD57_021D7944: ; 0x021D7944
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD57_021D8588
 	add r0, r4, #0
@@ -556,7 +556,7 @@ MOD57_021D7944: ; 0x021D7944
 	bl MOD57_021D7EDC
 	bl FUN_0201CD04
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
diff --git a/arm9/modules/58/asm/module_58.s b/arm9/modules/58/asm/module_58.s
index 625039e7..5f477c7b 100644
--- a/arm9/modules/58/asm/module_58.s
+++ b/arm9/modules/58/asm/module_58.s
@@ -47,7 +47,7 @@ _021D9A36:
 	ldr r1, _021D9B74 ; =0x00005CB0
 	add r0, r6, #0
 	mov r2, #0x27
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D9B74 ; =0x00005CB0
 	mov r1, #0
 	add r4, r0, #0
@@ -81,17 +81,17 @@ _021D9A36:
 	add r3, r0, #0
 	bl FUN_0200E1D0
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	bl FUN_02029ABC
 	bl FUN_02029AC8
 	ldr r1, _021D9B7C ; =0x00005B98
 	str r0, [r4, r1]
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	bl FUN_02029FC8
 	str r0, [r4, #8]
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	bl Sav2_PlayerData_GetOptionsAddr
 	str r0, [r4, #0xc]
 	add r0, r4, #0
@@ -129,7 +129,7 @@ _021D9A36:
 	str r0, [r5]
 	b _021D9B64
 _021D9B56:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0
 	str r0, [r5]
 	add sp, #0xc
@@ -154,7 +154,7 @@ _021D9B88: .word 0xFFFF7FFF
 MOD58_021D9B8C: ; 0x021D9B8C
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #0
@@ -207,7 +207,7 @@ _021D9BEC: .word 0x00004318
 MOD58_021D9BF0: ; 0x021D9BF0
 	push {r3, r4, r5, r6, r7, lr}
 	str r0, [sp]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	ldr r0, _021D9CAC ; =0x00005B98
 	mov r1, #0x2d
@@ -264,7 +264,7 @@ _021D9C40:
 	add r0, r6, #0
 	bl MOD58_021D9EA0
 	ldr r0, [sp]
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r2, _021D9CB0 ; =0x04000304
 	ldrh r1, [r2]
 	lsr r0, r2, #0xb
diff --git a/arm9/modules/59/asm/module_59.s b/arm9/modules/59/asm/module_59.s
index a06b384c..8e652086 100644
--- a/arm9/modules/59/asm/module_59.s
+++ b/arm9/modules/59/asm/module_59.s
@@ -15,7 +15,7 @@ MOD59_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	mov r1, #0xb4
 	mov r2, #0x52
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0
 	mov r2, #0xb4
 	add r4, r0, #0
@@ -23,7 +23,7 @@ MOD59_021D74E0: ; 0x021D74E0
 	mov r0, #0x52
 	str r0, [r4]
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #8]
 	str r0, [r4, #4]
 	bl Sav2_PlayerData_GetOptionsAddr
@@ -71,7 +71,7 @@ MOD59_021D7564: ; 0x021D7564
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	mov r6, #0
@@ -201,11 +201,11 @@ _021D7668:
 	b _021D76AC
 _021D7690:
 	ldr r0, [r4, #0x14]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #1
 	bne _021D76AC
 	ldr r0, [r4, #0x14]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	add r0, r6, #0
 	str r0, [r4, #0x14]
 	mov r0, #5
@@ -227,7 +227,7 @@ _021D76BC: .word MOD59_021D7724
 MOD59_021D76C0: ; 0x021D76C0
 	push {r4, r5, r6, lr}
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #4]
 	ldr r5, [r4]
@@ -250,12 +250,12 @@ MOD59_021D76C0: ; 0x021D76C0
 	ldr r0, [r4, #0x74]
 	bl FUN_02077AC4
 	add r0, r6, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r5, #0
 	bl FUN_020168D0
 	ldr r0, _021D771C ; =SDK_OVERLAY_MODULE_52_ID
 	ldr r1, _021D7720 ; =MOD52_021D76D8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #1
 	pop {r4, r5, r6, pc}
 	nop
@@ -3903,7 +3903,7 @@ _021D945C:
 	ldr r0, _021D9778 ; =UNK_020FA5FC
 	ldr r1, [r4, #0x70]
 	ldr r2, [r4]
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x14]
 	mov r0, #0x4d
 	str r0, [r4, #0xc]
@@ -4179,7 +4179,7 @@ _021D9684:
 	ldr r0, _021D9778 ; =UNK_020FA5FC
 	ldr r1, [r4, #0x74]
 	ldr r2, [r4]
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x14]
 	mov r0, #0x5d
 	str r0, [r4, #0xc]
@@ -4396,7 +4396,7 @@ _021D9848:
 	ldr r0, _021D9864 ; =0x021D9DDC
 	ldr r2, [r4]
 	add r1, r5, #0
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x14]
 	mov r0, #0x6d
 	str r0, [r4, #0xc]
@@ -4423,7 +4423,7 @@ MOD59_021D9868: ; 0x021D9868
 	add r0, r4, #0
 	mov r1, #0x28
 	mov r2, #0x53
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0
 	mov r2, #0x28
 	add r4, r0, #0
@@ -4441,7 +4441,7 @@ MOD59_021D9898: ; 0x021D9898
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	mov r6, #0
@@ -4603,10 +4603,10 @@ _021D99F4: .word 0x00000406
 MOD59_021D99F8: ; 0x021D99F8
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r4, [r0]
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r4, #0
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/60/asm/module_60.s b/arm9/modules/60/asm/module_60.s
index 58961d48..6c2094b1 100644
--- a/arm9/modules/60/asm/module_60.s
+++ b/arm9/modules/60/asm/module_60.s
@@ -7,7 +7,7 @@
 MOD60_021D74E0: ; 0x021D74E0
 	push {r3, r4, r5, lr}
 	add r4, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #1
 	add r5, r0, #0
 	mov r0, #3
@@ -18,7 +18,7 @@ MOD60_021D74E0: ; 0x021D74E0
 	add r0, r4, #0
 	lsl r1, r1, #2
 	mov r2, #0x26
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0xad
 	mov r1, #0
 	lsl r2, r2, #2
@@ -104,7 +104,7 @@ _021D75AC: .word 0xFFFF83FF
 MOD60_021D75B0: ; 0x021D75B0
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0x10]
 	lsl r0, r0, #0x1e
@@ -213,7 +213,7 @@ _021D7680:
 	bl FUN_02024F9C
 _021D769A:
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r0, [r4]
 	bl FUN_020168D0
 	mov r0, #1
@@ -228,7 +228,7 @@ _021D76B4: .word 0xFFFF83FF
 MOD60_021D76B8: ; 0x021D76B8
 	push {r3, r4, lr}
 	sub sp, #0xc
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r1, [r4, #4]
 	cmp r1, #4
diff --git a/arm9/modules/61/asm/module_61.s b/arm9/modules/61/asm/module_61.s
index ec5a0d99..ac07287d 100644
--- a/arm9/modules/61/asm/module_61.s
+++ b/arm9/modules/61/asm/module_61.s
@@ -7,7 +7,7 @@
 MOD61_021D74E0: ; 0x021D74E0
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r2, #2
 	mov r0, #3
 	mov r1, #0x29
@@ -16,7 +16,7 @@ MOD61_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	mov r1, #0xbc
 	mov r2, #0x29
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0
 	mov r2, #0xbc
 	add r4, r0, #0
@@ -24,7 +24,7 @@ MOD61_021D74E0: ; 0x021D74E0
 	mov r0, #0x29
 	str r0, [r4]
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #0x1c]
 	ldrh r0, [r0]
 	ldr r1, _021D754C ; =0x0000FFFF
@@ -59,7 +59,7 @@ _021D754C: .word 0x0000FFFF
 	thumb_func_start MOD61_021D7550
 MOD61_021D7550: ; 0x021D7550
 	push {r3, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	bl MOD61_021D78D4
 	cmp r0, #0
 	beq _021D7562
@@ -75,10 +75,10 @@ _021D7562:
 MOD61_021D7568: ; 0x021D7568
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r4, [r0]
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r4, #0
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/63/asm/mod63_021D74E0.s b/arm9/modules/63/asm/mod63_021D74E0.s
index 8d172847..09884c1e 100644
--- a/arm9/modules/63/asm/mod63_021D74E0.s
+++ b/arm9/modules/63/asm/mod63_021D74E0.s
@@ -47,7 +47,7 @@ MOD63_021D74E0: ; 0x021D74E0
 	add r0, r4, #0
 	lsl r1, r1, #2
 	mov r2, #0x1e
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x79
 	mov r1, #0
 	lsl r2, r2, #2
@@ -86,7 +86,7 @@ MOD63_021D759C: ; 0x021D759C
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r5]
 	cmp r0, #6
@@ -347,7 +347,7 @@ _021D77B0: .word 0x00007FFF
 MOD63_021D77B4: ; 0x021D77B4
 	push {r3, r4, r5, r6, r7, lr}
 	add r7, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	mov r0, #0x1d
 	lsl r0, r0, #4
@@ -361,7 +361,7 @@ MOD63_021D77B4: ; 0x021D77B4
 	add r0, r6, #0
 	bl MOD63_021D7B9C
 	add r0, r7, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r4, #0
 	bl FUN_020168D0
 	cmp r5, #1
@@ -374,20 +374,20 @@ _021D77F2:
 	mov r0, #0
 	ldr r1, _021D781C ; =UNK_020FF3D4
 	mvn r0, r0
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	b _021D7818
 _021D77FE:
 	mov r0, #0
 	ldr r1, _021D7820 ; =UNK_020FF368
 	mvn r0, r0
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	b _021D7818
 _021D780A:
 	mov r0, #0
 	bl FUN_0200415C
 	ldr r0, _021D7824 ; =SDK_OVERLAY_MODULE_63_ID
 	ldr r1, _021D7828 ; =MOD63_021DBE18
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 _021D7818:
 	mov r0, #1
 	pop {r3, r4, r5, r6, r7, pc}
diff --git a/arm9/modules/63/asm/mod63_021D8890.s b/arm9/modules/63/asm/mod63_021D8890.s
index c6b8180b..7940564f 100644
--- a/arm9/modules/63/asm/mod63_021D8890.s
+++ b/arm9/modules/63/asm/mod63_021D8890.s
@@ -591,7 +591,7 @@ MOD63_021D8D10: ; 0x021D8D10
 	add r0, r4, #0
 	lsl r1, r1, #2
 	mov r2, #0x4c
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0xab
 	mov r1, #0
 	lsl r2, r2, #2
@@ -622,7 +622,7 @@ _021D8D94: .word gUnk021C4918
 MOD63_021D8D98: ; 0x021D8D98
 	push {r3, r4, r5, lr}
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r5, r0, #0
 	mov r0, #0xaa
 	lsl r0, r0, #2
@@ -731,18 +731,18 @@ _021D8E64: .word 0x00000A8C
 MOD63_021D8E68: ; 0x021D8E68
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl FUN_0200E31C
 	ldr r0, [r4, #0x14]
 	bl SetLCRNGSeed
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x4c
 	bl FUN_020168D0
 	ldr r0, _021D8E94 ; =SDK_OVERLAY_MODULE_63_ID
 	ldr r1, _021D8E98 ; =MOD63_021DBAB8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #1
 	pop {r3, r4, r5, pc}
 	.align 2, 0
diff --git a/arm9/modules/64/asm/module_64.s b/arm9/modules/64/asm/module_64.s
index 3f68cd7c..6ece5b85 100644
--- a/arm9/modules/64/asm/module_64.s
+++ b/arm9/modules/64/asm/module_64.s
@@ -16,7 +16,7 @@ MOD64_021D74E0: ; 0x021D74E0
 	ldr r1, _021D7630 ; =0x000006B4
 	add r0, r4, #0
 	mov r2, #0x2f
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r5, r0, #0
 	bne _021D7504
 	bl ErrorHandling
@@ -32,7 +32,7 @@ _021D7504:
 	mov r2, #0x20
 	bl FUN_02016B20
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0
 	ldr r0, [r4, #4]
 	bl FUN_02025084
@@ -152,7 +152,7 @@ MOD64_021D7640: ; 0x021D7640
 	push {r3, r4, r5, r6, lr}
 	sub sp, #4
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r2, _021D76F0 ; =0x000008C3
 	add r1, sp, #0
 	strh r2, [r1]
@@ -238,10 +238,10 @@ _021D76F0: .word 0x000008C3
 MOD64_021D76F4: ; 0x021D76F4
 	push {r4, r5, r6, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r6, r0, #0
 	mov r0, #0
 	add r1, r0, #0
@@ -297,7 +297,7 @@ _021D7726:
 	bl MOD64_021D7828
 	bl FUN_0201C29C
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x2f
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/65/asm/module_65.s b/arm9/modules/65/asm/module_65.s
index 748c1b41..d6b9d89f 100644
--- a/arm9/modules/65/asm/module_65.s
+++ b/arm9/modules/65/asm/module_65.s
@@ -7,7 +7,7 @@
 MOD65_021D74E0: ; 0x021D74E0
 	push {r3, r4, r5, lr}
 	add r4, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #2
 	add r5, r0, #0
 	mov r0, #3
@@ -18,7 +18,7 @@ MOD65_021D74E0: ; 0x021D74E0
 	add r0, r4, #0
 	lsl r1, r1, #8
 	mov r2, #0x2d
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #2
 	mov r1, #0
 	lsl r2, r2, #8
@@ -40,7 +40,7 @@ _021D7520: .word 0x0000FFFF
 	thumb_func_start MOD65_021D7524
 MOD65_021D7524: ; 0x021D7524
 	push {r3, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	bl MOD65_021D757C
 	cmp r0, #0
 	beq _021D7536
@@ -56,7 +56,7 @@ _021D7536:
 MOD65_021D753C: ; 0x021D753C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldrb r1, [r4, #0x1a]
 	ldr r0, [r4, #0x20]
@@ -78,7 +78,7 @@ MOD65_021D753C: ; 0x021D753C
 	ldr r0, [r4, #0x20]
 	strh r1, [r0, #6]
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r0, [r4]
 	bl FUN_020168D0
 	mov r0, #1
@@ -2704,7 +2704,7 @@ MOD65_021D89C4: ; 0x021D89C4
 MOD65_021D8A08: ; 0x021D8A08
 	push {r3, r4, r5, lr}
 	add r4, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #1
 	add r5, r0, #0
 	mov r0, #3
@@ -2715,7 +2715,7 @@ MOD65_021D8A08: ; 0x021D8A08
 	add r0, r4, #0
 	lsl r1, r1, #2
 	mov r2, #0x2e
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x6f
 	mov r1, #0
 	lsl r2, r2, #2
@@ -2733,7 +2733,7 @@ MOD65_021D8A40: ; 0x021D8A40
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r5]
 	cmp r0, #2
@@ -2916,10 +2916,10 @@ _021D8BB8: .word MOD65_021D8C88
 MOD65_021D8BBC: ; 0x021D8BBC
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r0, [r4]
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/66/asm/module_66.s b/arm9/modules/66/asm/module_66.s
index 50786029..2967b0c9 100644
--- a/arm9/modules/66/asm/module_66.s
+++ b/arm9/modules/66/asm/module_66.s
@@ -7,7 +7,7 @@
 MOD66_021D74E0: ; 0x021D74E0
 	push {r3, r4, r5, lr}
 	add r4, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #2
 	add r5, r0, #0
 	mov r0, #3
@@ -17,7 +17,7 @@ MOD66_021D74E0: ; 0x021D74E0
 	add r0, r4, #0
 	mov r1, #0xe4
 	mov r2, #0x11
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0
 	mov r2, #0xe4
 	add r4, r0, #0
@@ -51,7 +51,7 @@ _021D7534: .word 0x00000139
 	thumb_func_start MOD66_021D7538
 MOD66_021D7538: ; 0x021D7538
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r1, [r4, #8]
 	cmp r1, #8
@@ -115,9 +115,9 @@ _021D75AA:
 MOD66_021D75B0: ; 0x021D75B0
 	push {r4, lr}
 	add r4, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r0, r4, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x11
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/67/asm/module_67.s b/arm9/modules/67/asm/module_67.s
index e00635fe..4c85f4ff 100644
--- a/arm9/modules/67/asm/module_67.s
+++ b/arm9/modules/67/asm/module_67.s
@@ -37,12 +37,12 @@ MOD67_021D74E0: ; 0x021D74E0
 	lsl r2, r2, #0x10
 	bl FUN_0201681C
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r5, r0, #0
 	ldr r1, _021D75C8 ; =0x00001068
 	add r0, r4, #0
 	mov r2, #0x2a
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D75C8 ; =0x00001068
 	mov r1, #0
 	add r4, r0, #0
@@ -102,7 +102,7 @@ _021D75CC: .word MOD67_021D7660
 MOD67_021D75D0: ; 0x021D75D0
 	push {r4, lr}
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4]
 	cmp r1, #4
 	bhi _021D7620
@@ -149,7 +149,7 @@ _021D7620:
 MOD67_021D7624: ; 0x021D7624
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	mov r0, #0
 	add r1, r0, #0
@@ -163,7 +163,7 @@ MOD67_021D7624: ; 0x021D7624
 	mov r0, #0
 	bl FUN_02002CC0
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x2a
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/68/asm/module_68.s b/arm9/modules/68/asm/module_68.s
index 953d3b63..ff21b695 100644
--- a/arm9/modules/68/asm/module_68.s
+++ b/arm9/modules/68/asm/module_68.s
@@ -37,14 +37,14 @@ MOD68_021D74E0: ; 0x021D74E0
 	add r0, r4, #0
 	lsl r1, r1, #2
 	mov r2, #0x24
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x81
 	mov r1, #0
 	lsl r2, r2, #2
 	add r5, r0, #0
 	bl memset
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0x7e
 	lsl r1, r1, #2
 	str r0, [r5, r1]
@@ -106,7 +106,7 @@ _021D75D4: .word MOD68_021D7680
 MOD68_021D75D8: ; 0x021D75D8
 	push {r3, r4, r5, lr}
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4]
 	add r5, r0, #0
 	cmp r1, #3
@@ -152,7 +152,7 @@ _021D7620:
 MOD68_021D762C: ; 0x021D762C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r4, #4
 	bl MOD68_021D78EC
@@ -168,7 +168,7 @@ MOD68_021D762C: ; 0x021D762C
 	ldr r0, [r4, r0]
 	bl FreeToHeap
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
diff --git a/arm9/modules/69/asm/module_69.s b/arm9/modules/69/asm/module_69.s
index e9c2015c..74cfe028 100644
--- a/arm9/modules/69/asm/module_69.s
+++ b/arm9/modules/69/asm/module_69.s
@@ -17,10 +17,10 @@ HOF_OverlayInit: ; 0x0222D5C0
 	ldr r1, _0222D70C ; =0x00001B60
 	add r0, r5, #0
 	mov r2, #0x3f
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #0x4e
 	str r0, [r4, #0xc]
 	mov r0, #0
@@ -181,7 +181,7 @@ HOF_OverlayTeardown: ; 0x0222D750
 	beq _0222D7C6
 	b _0222D7D2
 _0222D762:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, _0222D7D8 ; =0x00001B34
 	ldr r0, [r4, r0]
@@ -211,7 +211,7 @@ _0222D762:
 	ldr r0, [r4, r0]
 	bl DestroyMsgData
 	add r0, r6, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x3f
 	bl FUN_020168D0
 	ldr r0, [r5]
@@ -240,7 +240,7 @@ _0222D7F0: .word 0x00001B5C
 HOF_OverlayRun: ; 0x0222D7F4
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #5
diff --git a/arm9/modules/70/asm/module_70.s b/arm9/modules/70/asm/module_70.s
index e2e99a1f..f18bda67 100644
--- a/arm9/modules/70/asm/module_70.s
+++ b/arm9/modules/70/asm/module_70.s
@@ -20,11 +20,11 @@ MOD70_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	mov r1, #0xdc
 	mov r2, #0x3c
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	beq _021D7558
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r1, r4, #0
 	add r1, #0xcc
 	str r0, [r1]
@@ -66,7 +66,7 @@ _021D7558:
 MOD70_021D755C: ; 0x021D755C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, #0xc8
 	ldr r0, [r0]
@@ -74,7 +74,7 @@ MOD70_021D755C: ; 0x021D755C
 	add r0, r4, #0
 	bl MOD70_021D7760
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x3d
 	bl FUN_020168D0
 	mov r0, #0x3c
@@ -88,7 +88,7 @@ MOD70_021D755C: ; 0x021D755C
 MOD70_021D758C: ; 0x021D758C
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, #0xd8
 	ldr r0, [r0]
diff --git a/arm9/modules/71/asm/module_71.s b/arm9/modules/71/asm/module_71.s
index c5d9cbbc..c3249b66 100644
--- a/arm9/modules/71/asm/module_71.s
+++ b/arm9/modules/71/asm/module_71.s
@@ -31,7 +31,7 @@ MOD71_0222D5C0: ; 0x0222D5C0
 	ldr r1, _0222D738 ; =0x000036B4
 	add r0, r5, #0
 	mov r2, #0x1a
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	ldr r2, _0222D738 ; =0x000036B4
 	mov r0, #0
@@ -444,7 +444,7 @@ MOD71_0222D9C8: ; 0x0222D9C8
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	mov r6, #0
@@ -555,11 +555,11 @@ _0222DA72:
 	b _0222DB32
 _0222DAAE:
 	ldr r0, [r4, #0x40]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _0222DB32
 	ldr r0, [r4, #0x40]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	add r0, r4, #0
 	bl MOD71_0222D820
 	add r0, r6, #0
@@ -1722,10 +1722,10 @@ _0222E434: .word 0x000007A8
 MOD71_0222E438: ; 0x0222E438
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, [r4, #0x5c]
 	str r1, [r0, #0x28]
 	add r0, r4, #0
@@ -1772,7 +1772,7 @@ MOD71_0222E438: ; 0x0222E438
 	ldr r0, [r4, r0]
 	bl String_dtor
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
@@ -2088,7 +2088,7 @@ MOD71_0222E76C: ; 0x0222E76C
 	push {r4, r5, r6, lr}
 	add r5, r0, #0
 	add r0, r1, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0
 	mov r2, #6
 	ldr r0, _0222E830 ; =0x00000668
@@ -3937,7 +3937,7 @@ _0222F606:
 	ldr r0, _0222F670 ; =UNK_020FA6E8
 	add r1, #0xc
 	mov r2, #0x1a
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r5, #0x40]
 	str r4, [r5, #0x3c]
 	pop {r3, r4, r5, pc}
diff --git a/arm9/modules/73/asm/module_73.s b/arm9/modules/73/asm/module_73.s
index 4a1e86bf..d46ff721 100644
--- a/arm9/modules/73/asm/module_73.s
+++ b/arm9/modules/73/asm/module_73.s
@@ -17,7 +17,7 @@ MOD73_021D74E0: ; 0x021D74E0
 MOD73_021D74F0: ; 0x021D74F0
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #2
 	add r4, r0, #0
 	mov r0, #3
@@ -27,7 +27,7 @@ MOD73_021D74F0: ; 0x021D74F0
 	ldr r1, _021D757C ; =0x000015E8
 	add r0, r5, #0
 	mov r2, #0x38
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D757C ; =0x000015E8
 	add r5, r0, #0
 	mov r1, #0
@@ -87,10 +87,10 @@ MOD73_021D758C: ; 0x021D758C
 	push {r3, r4, r5, r6, r7, lr}
 	add r4, r0, #0
 	add r5, r1, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r7, r0, #0
 	add r0, r4, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0xc]
 	ldr r1, _021D763C ; =0x021DBC9C
@@ -180,10 +180,10 @@ _021D763C: .word MOD73_021DBC9C
 MOD73_021D7640: ; 0x021D7640
 	push {r3, r4, r5, r6, r7, lr}
 	add r5, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r6, r0, #0
 	add r0, r5, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r7, r0, #0
 	ldr r4, [r7]
 	bl MOD73_021D8E90
@@ -197,7 +197,7 @@ MOD73_021D7640: ; 0x021D7640
 	mov r1, #0
 	bl MI_CpuFill8
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	str r0, [r6, #0x18]
 	add r0, r4, #0
diff --git a/arm9/modules/74/asm/module_74.s b/arm9/modules/74/asm/module_74.s
index e843de0d..1aca7c52 100644
--- a/arm9/modules/74/asm/module_74.s
+++ b/arm9/modules/74/asm/module_74.s
@@ -7,7 +7,7 @@
 MOD74_021D74E0: ; 0x021D74E0
 	push {r3, r4, r5, lr}
 	add r4, r0, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r2, #1
 	add r5, r0, #0
 	mov r0, #3
@@ -18,7 +18,7 @@ MOD74_021D74E0: ; 0x021D74E0
 	add r0, r4, #0
 	lsl r1, r1, #2
 	mov r2, #0x4a
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0xad
 	mov r1, #0
 	lsl r2, r2, #2
@@ -51,10 +51,10 @@ MOD74_021D74E0: ; 0x021D74E0
 MOD74_021D7540: ; 0x021D7540
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	ldr r0, [r4]
 	bl FUN_020168D0
 	mov r0, #1
@@ -67,7 +67,7 @@ MOD74_021D755C: ; 0x021D755C
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4]
 	add r5, r0, #0
 	cmp r1, #4
diff --git a/arm9/modules/75/asm/module_75.s b/arm9/modules/75/asm/module_75.s
index ec4049ab..f2852678 100644
--- a/arm9/modules/75/asm/module_75.s
+++ b/arm9/modules/75/asm/module_75.s
@@ -36,13 +36,13 @@ MOD75_021E6BA0: ; 0x021E6BA0
 	ldr r1, _021E6D60 ; =0x000004A4
 	add r0, r5, #0
 	mov r2, #6
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021E6D60 ; =0x000004A4
 	mov r1, #0
 	add r4, r0, #0
 	bl memset
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r1, r4, #0
 	add r1, #0xc4
 	str r0, [r1]
@@ -196,7 +196,7 @@ _021E6D68: .word MOD75_021E700C
 MOD75_021E6D6C: ; 0x021E6D6C
 	push {r3, r4, r5, lr}
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4]
 	add r5, r0, #0
 	cmp r1, #0x18
@@ -406,7 +406,7 @@ _021E6EE0:
 MOD75_021E6F00: ; 0x021E6F00
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD75_021EBFE4
 	add r0, r4, #0
@@ -455,7 +455,7 @@ MOD75_021E6F00: ; 0x021E6F00
 	ldr r0, [r4]
 	bl NARC_dtor
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
diff --git a/arm9/modules/76/asm/module_76.s b/arm9/modules/76/asm/module_76.s
index 028319f9..c062f14a 100644
--- a/arm9/modules/76/asm/module_76.s
+++ b/arm9/modules/76/asm/module_76.s
@@ -16,14 +16,14 @@ MOD76_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	lsl r1, r1, #2
 	mov r2, #0x43
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x62
 	mov r1, #0
 	lsl r2, r2, #2
 	add r4, r0, #0
 	bl memset
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4]
 	add r0, r4, #0
 	bl MOD76_021D7638
@@ -67,7 +67,7 @@ _021D7564: .word MOD76_021D76E8
 MOD76_021D7568: ; 0x021D7568
 	push {r3, r4, r5, lr}
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r4]
 	add r5, r0, #0
 	cmp r1, #0xc
@@ -161,10 +161,10 @@ _021D7606:
 MOD76_021D761C: ; 0x021D761C
 	push {r4, lr}
 	add r4, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	bl MOD76_021D76B8
 	add r0, r4, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x43
 	bl FUN_020168D0
 	mov r0, #1
@@ -3165,7 +3165,7 @@ MOD76_021D8D5C: ; 0x021D8D5C
 	ldr r0, _021D8DE8 ; =UNK_020FA6E8
 	add r1, r4, r1
 	mov r2, #0x43
-	bl FUN_02006234
+	bl OverlayManager_new
 	mov r1, #0x5f
 	lsl r1, r1, #2
 	str r0, [r4, r1]
@@ -3184,13 +3184,13 @@ MOD76_021D8DEC: ; 0x021D8DEC
 	mov r0, #0x5f
 	lsl r0, r0, #2
 	ldr r0, [r4, r0]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _021D8E3E
 	mov r0, #0x5f
 	lsl r0, r0, #2
 	ldr r0, [r4, r0]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	add r0, r4, #0
 	bl MOD76_021D7638
 	ldr r1, [r4]
diff --git a/arm9/modules/77/asm/module_77.s b/arm9/modules/77/asm/module_77.s
index 3d646524..7219a909 100644
--- a/arm9/modules/77/asm/module_77.s
+++ b/arm9/modules/77/asm/module_77.s
@@ -32,7 +32,7 @@ MOD77_021D74E0: ; 0x021D74E0
 	ldr r1, _021D75DC ; =0x0000C32C
 	add r0, r4, #0
 	mov r2, #0x32
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _021D75DC ; =0x0000C32C
 	mov r1, #0
 	add r5, r0, #0
@@ -51,7 +51,7 @@ _021D7540:
 	ldr r0, _021D75E4 ; =0x0000C2F0
 	str r1, [r5, r0]
 	add r0, r4, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r4, r0, #0
 	bl FUN_02029AFC
 	str r0, [r5, #4]
@@ -125,7 +125,7 @@ MOD77_021D7604: ; 0x021D7604
 	push {r4, r5, r6, r7, lr}
 	sub sp, #0x14
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	mov r7, #0
@@ -800,7 +800,7 @@ _021D7BA8: .word 0x0000C060
 MOD77_021D7BAC: ; 0x021D7BAC
 	push {r4, r5, r6, lr}
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	mov r0, #4
 	mov r1, #0
@@ -829,7 +829,7 @@ MOD77_021D7BAC: ; 0x021D7BAC
 	add r1, r0, #0
 	bl FUN_02015F10
 	add r0, r6, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r5, #0
 	bl FUN_020168D0
 	ldr r0, _021D7C20 ; =gUnk021C4918
diff --git a/arm9/modules/78/asm/module_78.s b/arm9/modules/78/asm/module_78.s
index 1e9df5e9..60412019 100644
--- a/arm9/modules/78/asm/module_78.s
+++ b/arm9/modules/78/asm/module_78.s
@@ -16,13 +16,13 @@ MOD78_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	mov r1, #0xa0
 	mov r2, #0x48
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0
 	mov r2, #0xa0
 	add r4, r0, #0
 	bl memset
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	add r5, r0, #0
 	add r0, r4, #0
 	ldrb r1, [r5]
@@ -138,7 +138,7 @@ _021D75DE:
 	str r0, [r1, #4]
 	str r0, [r1, #8]
 	add r0, r2, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r5]
 	cmp r0, #0
@@ -231,7 +231,7 @@ _021D76B4: .word 0x000006DC
 MOD78_021D76B8: ; 0x021D76B8
 	push {r3, r4, r5, r6, r7, lr}
 	str r0, [sp]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	add r7, r6, #0
 	mov r4, #0
@@ -256,7 +256,7 @@ _021D76C8:
 	ldr r0, [r6]
 	bl FUN_0201EB70
 	ldr r0, [sp]
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	bl FUN_0201B398
 	mov r0, #0x48
 	bl FUN_020168D0
diff --git a/arm9/modules/80/asm/module_80.s b/arm9/modules/80/asm/module_80.s
index 6f1d2bbe..9fa71b61 100644
--- a/arm9/modules/80/asm/module_80.s
+++ b/arm9/modules/80/asm/module_80.s
@@ -1395,7 +1395,7 @@ _0222DFE4:
 	ldr r1, _0222E108 ; =0x00001044
 	add r0, r6, #0
 	mov r2, #0x3e
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _0222E108 ; =0x00001044
 	mov r1, #0
 	add r4, r0, #0
@@ -1511,7 +1511,7 @@ _0222E130: .word 0x00020020
 MOD80_0222E134: ; 0x0222E134
 	push {r4, r5, r6, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD04_021DD984
 	bl MOD80_0222D5DC
@@ -1651,7 +1651,7 @@ _0222E258: .word 0x00000B84
 MOD80_0222E25C: ; 0x0222E25C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0x48]
 	bl FreeToHeap
@@ -1684,7 +1684,7 @@ MOD80_0222E25C: ; 0x0222E25C
 	ldr r0, [r4]
 	bl FreeToHeap
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
@@ -1751,7 +1751,7 @@ MOD80_0222E338: ; 0x0222E338
 	push {r4, lr}
 	add r4, r0, #0
 	add r0, r1, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0
 	str r0, [r4]
 	add r0, r4, #0
@@ -17146,7 +17146,7 @@ MOD80_02235D34: ; 0x02235D34
 	ldr r0, _02235DD0 ; =UNK_020FA6E8
 	add r1, #0x60
 	mov r2, #0x3e
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x5c]
 	mov r0, #1
 	add r4, #0xac
@@ -17164,11 +17164,11 @@ MOD80_02235DD4: ; 0x02235DD4
 	add r5, r0, #0
 	ldr r0, [r5, #0x5c]
 	mov r4, #3
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	beq _02235DF6
 	ldr r0, [r5, #0x5c]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	ldr r2, [r5, #0x24]
 	add r0, r5, #0
 	mov r1, #5
@@ -17392,7 +17392,7 @@ _02235F94:
 	add r1, r4, #0
 	ldr r0, _02235FB8 ; =0x022375F0
 	add r1, #0x90
-	bl FUN_02006234
+	bl OverlayManager_new
 	str r0, [r4, #0x5c]
 	mov r0, #1
 	add r4, #0xac
@@ -17419,13 +17419,13 @@ _02235FD0:
 	b _0223617E
 _02235FD2:
 	ldr r0, [r4, #0x5c]
-	bl FUN_02006290
+	bl OverlayManager_Run
 	cmp r0, #0
 	bne _02235FDE
 	b _0223617E
 _02235FDE:
 	ldr r0, [r4, #0x5c]
-	bl FUN_02006260
+	bl OverlayManager_delete
 	ldr r1, [r4, #0x24]
 	cmp r1, #9
 	bne _02236060
diff --git a/arm9/modules/81/asm/module_81.s b/arm9/modules/81/asm/module_81.s
index 6b04578f..2153f93f 100644
--- a/arm9/modules/81/asm/module_81.s
+++ b/arm9/modules/81/asm/module_81.s
@@ -30,13 +30,13 @@ _02237E50:
 	add r0, r5, #0
 	lsl r1, r1, #2
 	mov r2, #0x39
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	bne _02237E84
 	b _02237FC2
 _02237E84:
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4]
 	mov r0, #0
 	str r0, [r4, #4]
@@ -216,7 +216,7 @@ MOD81_02238004: ; 0x02238004
 	bl OS_DisableInterrupts
 	add r6, r0, #0
 	add r0, r5, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	mov r0, #0x51
 	lsl r0, r0, #2
@@ -235,7 +235,7 @@ MOD81_02238004: ; 0x02238004
 	bl FUN_0201FD58
 	bl FUN_02009FA0
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x39
 	bl FUN_020168D0
 	mov r0, #0x3a
@@ -251,7 +251,7 @@ MOD81_02238004: ; 0x02238004
 MOD81_02238064: ; 0x02238064
 	push {r4, r5, r6, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r3, [r4, #4]
 	cmp r3, #7
diff --git a/arm9/modules/82/asm/module_82.s b/arm9/modules/82/asm/module_82.s
index 1427108d..cc15c1dc 100644
--- a/arm9/modules/82/asm/module_82.s
+++ b/arm9/modules/82/asm/module_82.s
@@ -645,7 +645,7 @@ _0222DA48:
 	ldr r1, _0222DB58 ; =0x00000EC8
 	add r0, r6, #0
 	mov r2, #0x44
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _0222DB58 ; =0x00000EC8
 	mov r1, #0
 	add r4, r0, #0
@@ -751,7 +751,7 @@ _0222DB78: .word 0x00020020
 MOD82_0222DB7C: ; 0x0222DB7C
 	push {r4, r5, r6, lr}
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r5, r0, #0
 	bl MOD04_021DD984
 	bl MOD82_0222D5DC
@@ -855,7 +855,7 @@ _0222DC4C: .word MOD82_0222FA14
 MOD82_0222DC50: ; 0x0222DC50
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0x24]
 	bl FreeToHeap
@@ -882,7 +882,7 @@ MOD82_0222DC50: ; 0x0222DC50
 	ldr r0, [r4, #4]
 	bl FreeToHeap
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0
 	add r1, r0, #0
 	bl FUN_02015F10
@@ -938,7 +938,7 @@ MOD82_0222DD04: ; 0x0222DD04
 	push {r4, lr}
 	add r4, r0, #0
 	add r0, r1, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	mov r1, #0
 	str r0, [r4]
 	add r0, r4, #0
diff --git a/arm9/modules/83/asm/module_83.s b/arm9/modules/83/asm/module_83.s
index 4e81fd4b..8204f46d 100644
--- a/arm9/modules/83/asm/module_83.s
+++ b/arm9/modules/83/asm/module_83.s
@@ -1805,7 +1805,7 @@ _0222E38E:
 	thumb_func_start MOD83_0222E3B8
 MOD83_0222E3B8: ; 0x0222E3B8
 	push {r3, r4, r5, r6, r7, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r1, #0x15
 	add r7, r0, #0
 	lsl r1, r1, #4
@@ -1921,7 +1921,7 @@ MOD83_0222E48C: ; 0x0222E48C
 	add r0, r5, #0
 	lsl r1, r1, #2
 	mov r2, #0x51
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r2, #0x57
 	mov r1, #0
 	lsl r2, r2, #2
@@ -1937,7 +1937,7 @@ MOD83_0222E48C: ; 0x0222E48C
 	mov r1, #0
 	bl FUN_0200E3A0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #8]
 	str r0, [r4, #4]
 	bl FUN_0202251C
@@ -1991,7 +1991,7 @@ MOD83_0222E540: ; 0x0222E540
 	push {r4, r5, r6, lr}
 	add r6, r0, #0
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0x18]
 	add r0, r0, #1
@@ -2310,27 +2310,27 @@ _0222E7C0: ; jump table
 _0222E7D0:
 	ldr r0, _0222E824 ; =SDK_OVERLAY_MODULE_52_ID
 	ldr r1, _0222E828 ; =MOD52_021D76C8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	pop {r3, pc}
 _0222E7DA:
 	ldr r0, _0222E824 ; =SDK_OVERLAY_MODULE_52_ID
 	ldr r1, _0222E82C ; =MOD52_021D76E8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	pop {r3, pc}
 _0222E7E4:
 	ldr r0, _0222E830 ; =SDK_OVERLAY_MODULE_83_ID
 	ldr r1, _0222E834 ; =MOD83_0223A434
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	pop {r3, pc}
 _0222E7EE:
 	ldr r0, _0222E830 ; =SDK_OVERLAY_MODULE_83_ID
 	ldr r1, _0222E838 ; =MOD83_0223A4FC
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	pop {r3, pc}
 _0222E7F8:
 	ldr r0, _0222E830 ; =SDK_OVERLAY_MODULE_83_ID
 	ldr r1, _0222E83C ; =MOD83_0223A3A8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	pop {r3, pc}
 _0222E802:
 	ldr r0, _0222E840 ; =MOD83_0223A8C4
@@ -2341,12 +2341,12 @@ _0222E80A:
 	mov r0, #0
 	ldr r1, _0222E844 ; =UNK_020FD6D4
 	mvn r0, r0
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	pop {r3, pc}
 _0222E81A:
 	ldr r0, _0222E848 ; =SDK_OVERLAY_MODULE_63_ID
 	ldr r1, _0222E84C ; =MOD63_021DBAB8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 _0222E822:
 	pop {r3, pc}
 	.align 2, 0
@@ -2367,10 +2367,10 @@ _0222E84C: .word MOD63_021DBAB8
 MOD83_0222E850: ; 0x0222E850
 	push {r4, lr}
 	add r4, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	bl MOD83_0222E7AC
 	add r0, r4, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x51
 	bl FUN_020168D0
 	mov r0, #0
@@ -2989,7 +2989,7 @@ _0222ED84: .word 0x00000172
 	thumb_func_start MOD83_0222ED88
 MOD83_0222ED88: ; 0x0222ED88
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD83_02238E48
 	add r0, r4, #0
@@ -3048,7 +3048,7 @@ MOD83_0222EDF8: ; 0x0222EDF8
 	bl FUN_02016B94
 	str r0, [r4, #4]
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #8]
 	str r0, [r4, #8]
 	bl Sav2_PlayerData_GetProfileAddr
@@ -3104,7 +3104,7 @@ MOD83_0222EE8C: ; 0x0222EE8C
 	sub sp, #4
 	add r5, r1, #0
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #0xd
@@ -3315,9 +3315,9 @@ MOD83_0222F048: ; 0x0222F048
 	bl FUN_020168D0
 	ldr r0, _0222F06C ; =SDK_OVERLAY_MODULE_63_ID
 	ldr r1, _0222F070 ; =MOD63_021DBAB8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	add r0, r4, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x55
 	bl FUN_020168D0
 	mov r0, #1
@@ -4408,7 +4408,7 @@ MOD83_0222F900: ; 0x0222F900
 	cmp r0, #0
 	bne _0222F92C
 	bl MOD83_02231364
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #8]
 	add r1, r4, #0
 	bl FUN_02031CA8
@@ -4603,7 +4603,7 @@ _0222FA48: .word MOD83_0222FA0C
 	thumb_func_start MOD83_0222FA4C
 MOD83_0222FA4C: ; 0x0222FA4C
 	push {r3, r4, r5, r6, r7, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r7, r0, #0
 	bl MOD83_02238E48
 	ldr r0, [r7, #0x7c]
@@ -4740,7 +4740,7 @@ _0222FB5A:
 MOD83_0222FB5C: ; 0x0222FB5C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, _0222FBB0 ; =0x000015D4
 	ldr r0, [r4, r0]
@@ -4785,7 +4785,7 @@ _0222FBB8: .word 0x00000434
 MOD83_0222FBBC: ; 0x0222FBBC
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, #0x80
 	ldr r1, [r0]
@@ -4852,7 +4852,7 @@ _0222FC3C: .word 0x00000438
 	thumb_func_start MOD83_0222FC40
 MOD83_0222FC40: ; 0x0222FC40
 	push {r3, r4, r5, r6, r7, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, _0222FCA4 ; =0x000015D4
 	add r5, r4, #0
@@ -4936,14 +4936,14 @@ MOD83_0222FCE4: ; 0x0222FCE4
 	push {r3, r4, r5, r6, r7, lr}
 	sub sp, #0x18
 	add r7, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	add r4, r6, #0
 	add r5, r6, #0
 	add r0, r7, #0
 	add r4, #0x8c
 	add r5, #0xdc
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #8]
 	str r0, [sp]
 	add r0, r4, #0
@@ -5016,7 +5016,7 @@ MOD83_0222FD84: ; 0x0222FD84
 	sub sp, #0x14
 	add r6, r0, #0
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	cmp r4, #0
 	bne _0222FD98
 	mov r5, #4
@@ -5067,7 +5067,7 @@ _0222FDE4: .word MOD83_0223ADD8
 MOD83_0222FDE8: ; 0x0222FDE8
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, #0x48
 	mov r1, #0
@@ -5097,7 +5097,7 @@ MOD83_0222FE24: ; 0x0222FE24
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0x14
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r5, r0, #0
 	bl MOD83_02238700
 	cmp r0, #0
@@ -5158,7 +5158,7 @@ MOD83_0222FEA0: ; 0x0222FEA0
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0x14
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, _0222FF08 ; =0x000015D4
 	mov r1, #4
@@ -5213,7 +5213,7 @@ MOD83_0222FF10: ; 0x0222FF10
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0x14
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, _0222FF78 ; =0x000015D4
 	mov r1, #3
@@ -5268,7 +5268,7 @@ MOD83_0222FF80: ; 0x0222FF80
 	push {r4, r5, lr}
 	sub sp, #0x14
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r1, [r0, #0x48]
 	add r4, #0x48
@@ -5312,7 +5312,7 @@ _0222FFD4: .word MOD83_0223ADB8
 MOD83_0222FFD8: ; 0x0222FFD8
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, #0x48
 	mov r1, #0
@@ -5339,7 +5339,7 @@ _0223000C: .word 0x000015D4
 MOD83_02230010: ; 0x02230010
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r1, r4, #0
 	add r0, r5, #0
@@ -5366,7 +5366,7 @@ _02230044: .word MOD83_0223B888
 MOD83_02230048: ; 0x02230048
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r0, #0x80
 	ldr r0, [r0]
@@ -5422,7 +5422,7 @@ _022300A8: .word MOD83_0223B888
 MOD83_022300AC: ; 0x022300AC
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	add r1, r4, #0
 	add r0, r5, #0
@@ -5457,7 +5457,7 @@ _022300F4: .word 0x00002620
 MOD83_022300F8: ; 0x022300F8
 	push {r4, lr}
 	add r4, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r0, #0x38
 	mov r1, #0
 	bl MOD83_0222FB44
@@ -5475,7 +5475,7 @@ MOD83_02230118: ; 0x02230118
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0x14
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r5, r0, #0
 	ldr r0, [r5, #4]
 	bl FUN_0202251C
@@ -5537,7 +5537,7 @@ _02230198: .word MOD83_0223AE20
 	thumb_func_start MOD83_0223019C
 MOD83_0223019C: ; 0x0223019C
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, _022301CC ; =0x000005C8
 	add r4, r0, #0
 	ldr r2, [r4, r1]
@@ -5565,7 +5565,7 @@ _022301D0: .word 0x000015D8
 	thumb_func_start MOD83_022301D4
 MOD83_022301D4: ; 0x022301D4
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, _02230204 ; =0x000005C8
 	ldr r1, [r4, r0]
@@ -5807,7 +5807,7 @@ MOD83_022303B0: ; 0x022303B0
 	add r5, r1, #0
 	add r7, r2, #0
 	str r3, [sp, #4]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #0x7c]
 	cmp r0, #0
@@ -5895,7 +5895,7 @@ MOD83_02230464: ; 0x02230464
 	str r0, [sp, #0x14]
 	str r1, [sp, #0x1c]
 	str r2, [sp, #0x18]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r7, r0, #0
 	ldr r0, [r7, #4]
 	mov r5, #0
@@ -5977,7 +5977,7 @@ MOD83_0223050C: ; 0x0223050C
 	sub sp, #0x10
 	add r5, r1, #0
 	add r7, r2, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r2, _0223059C ; =0x00000172
 	mov r0, #1
@@ -6046,7 +6046,7 @@ MOD83_022305A4: ; 0x022305A4
 	sub sp, #0x10
 	add r5, r1, #0
 	add r6, r2, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	mov r0, #0x25
 	mov r1, #0x56
 	bl String_ctor
@@ -6090,7 +6090,7 @@ MOD83_02230604: ; 0x02230604
 	add r7, r0, #0
 	add r5, r1, #0
 	add r6, r2, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r0, [r0, #0x78]
 	bl FUN_02001204
 	add r4, r0, #0
@@ -6220,7 +6220,7 @@ MOD83_02230714: ; 0x02230714
 	push {r4, r5, r6, lr}
 	add r6, r0, #0
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r1, _022307A4 ; =0x000015DC
 	add r0, r6, #0
@@ -6363,7 +6363,7 @@ _02230848: .word 0x00000265
 MOD83_0223084C: ; 0x0223084C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r1, r0, #0
 	add r0, #0x80
 	ldr r0, [r0]
@@ -6413,7 +6413,7 @@ MOD83_0223089C: ; 0x0223089C
 	add r6, r1, #0
 	add r5, r2, #0
 	str r3, [sp, #4]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	cmp r6, #0
 	beq _022308F8
@@ -6509,7 +6509,7 @@ MOD83_02230954: ; 0x02230954
 	ldr r1, _022309FC ; =0x00002998
 	add r0, r5, #0
 	mov r2, #0x56
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _022309FC ; =0x00002998
 	mov r1, #0
 	add r4, r0, #0
@@ -6550,7 +6550,7 @@ _022309D0:
 	mov r1, #0x1d
 	str r1, [r4, r0]
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #8]
 	str r0, [r4, #4]
 	bl Sav2_PlayerData_GetOptionsAddr
@@ -6578,7 +6578,7 @@ MOD83_02230A10: ; 0x02230A10
 	sub sp, #0x14
 	add r6, r0, #0
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl CTRDG_IsExisting
 	ldr r0, _02230D5C ; =0x000005C8
@@ -7676,7 +7676,7 @@ _02231378: .word MOD83_0223B888
 MOD83_0223137C: ; 0x0223137C
 	push {r3, r4, r5, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	mov r0, #0x11
 	lsl r0, r0, #6
@@ -7685,19 +7685,19 @@ MOD83_0223137C: ; 0x0223137C
 	bne _0223139A
 	ldr r0, _022313D0 ; =SDK_OVERLAY_MODULE_63_ID
 	ldr r1, _022313D4 ; =MOD63_021DBAB8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	b _022313A6
 _0223139A:
 	cmp r0, #1
 	bne _022313A6
 	ldr r0, _022313D8 ; =SDK_OVERLAY_MODULE_83_ID
 	ldr r1, _022313DC ; =MOD83_0223A444
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 _022313A6:
 	mov r0, #0x5b
 	bl FUN_020168D0
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x56
 	bl FUN_020168D0
 	ldr r0, _022313E0 ; =0x000015D4
@@ -8344,7 +8344,7 @@ MOD83_02231820: ; 0x02231820
 	thumb_func_start MOD83_022318B0
 MOD83_022318B0: ; 0x022318B0
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD83_02231A00
 	ldr r0, _022318DC ; =0x00002B70
@@ -8368,7 +8368,7 @@ _022318DC: .word 0x00002B70
 	thumb_func_start MOD83_022318E0
 MOD83_022318E0: ; 0x022318E0
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD83_02231A00
 	mov r1, #0xad
@@ -8407,7 +8407,7 @@ _0223192C: .word 0x00002B70
 	thumb_func_start MOD83_02231930
 MOD83_02231930: ; 0x02231930
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD83_02231A00
 	ldr r0, _022319C0 ; =0x00002B70
@@ -8476,7 +8476,7 @@ _022319CC: .word 0x00002B60
 	thumb_func_start MOD83_022319D0
 MOD83_022319D0: ; 0x022319D0
 	push {r4, lr}
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl MOD83_02231A00
 	ldr r0, _022319FC ; =0x00002B70
@@ -9526,7 +9526,7 @@ MOD83_02232208: ; 0x02232208
 	add r7, r0, #0
 	add r5, r1, #0
 	add r6, r2, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, _02232270 ; =0x00002B68
 	ldr r0, [r0, r1]
 	bl FUN_02001204
@@ -9730,7 +9730,7 @@ MOD83_022323A8: ; 0x022323A8
 	ldr r1, _0223240C ; =0x00003CF4
 	add r0, r4, #0
 	mov r2, #0x57
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _0223240C ; =0x00003CF4
 	mov r1, #0
 	add r4, r0, #0
@@ -10226,7 +10226,7 @@ MOD83_02232788: ; 0x02232788
 	sub sp, #8
 	add r5, r1, #0
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	cmp r1, #0x1d
@@ -10272,7 +10272,7 @@ _022327AA: ; jump table
 	.short _02232CF4 - _022327AA - 2 ; case 29
 _022327E6:
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, [r0, #8]
 	ldr r0, _02232B54 ; =0x00002B44
 	str r1, [r4, r0]
@@ -11300,7 +11300,7 @@ _022330A0: .word 0x00002BE0
 MOD83_022330A4: ; 0x022330A4
 	push {r3, r4, r5, r6, r7, lr}
 	str r0, [sp]
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r7, r0, #0
 	ldr r0, _02233154 ; =0x000029A8
 	mov r6, #0
@@ -11364,11 +11364,11 @@ _02233104:
 	bl FreeToHeap
 	ldr r0, _02233160 ; =SDK_OVERLAY_MODULE_83_ID
 	ldr r1, _02233164 ; =MOD83_0223A434
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	mov r0, #0x5b
 	bl FUN_020168D0
 	ldr r0, [sp]
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x57
 	bl FUN_020168D0
 	mov r0, #1
@@ -18513,7 +18513,7 @@ MOD83_02236764: ; 0x02236764
 	ldr r1, _022367F0 ; =0x00012608
 	add r0, r5, #0
 	mov r2, #0x4e
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	ldr r2, _022367F0 ; =0x00012608
 	mov r1, #0
 	add r4, r0, #0
@@ -18532,7 +18532,7 @@ MOD83_02236764: ; 0x02236764
 	mov r1, #0
 	bl FUN_0200E3A0
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r0, [r0, #8]
 	str r0, [r4, #0x10]
 	bl Sav2_PlayerData_GetProfileAddr
@@ -18570,7 +18570,7 @@ _02236800: .word MOD83_0223BB14
 MOD83_02236804: ; 0x02236804
 	push {r4, r5, r6, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	bl CTRDG_IsExisting
 	bl CTRDG_IsPulledOut
@@ -19278,14 +19278,14 @@ _02236DCC: .word gMain
 MOD83_02236DD0: ; 0x02236DD0
 	push {r4, lr}
 	add r4, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r0, [r0, #0x20]
 	bl FreeToHeap
 	ldr r0, _02236DFC ; =SDK_OVERLAY_MODULE_63_ID
 	ldr r1, _02236E00 ; =MOD63_021DBAB8
-	bl FUN_02000E7C
+	bl RegisterMainOverlay
 	add r0, r4, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x4e
 	bl FUN_020168D0
 	mov r0, #0
@@ -22831,7 +22831,7 @@ MOD83_022387A0: ; 0x022387A0
 	add r0, r5, #0
 	add r1, r4, #0
 	add r2, r6, #0
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0
 	add r2, r4, #0
 	add r5, r0, #0
@@ -25955,7 +25955,7 @@ _02239F30: .word MOD83_0223CADC
 MOD83_02239F34: ; 0x02239F34
 	push {r3, r4, r5, lr}
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, _0223A24C ; =0x0000260C
 	add r4, r0, #0
 	ldr r1, [r4, r1]
diff --git a/arm9/modules/84/asm/module_84_thumb1.s b/arm9/modules/84/asm/module_84_thumb1.s
index a00ea88f..0a2c3e1b 100644
--- a/arm9/modules/84/asm/module_84_thumb1.s
+++ b/arm9/modules/84/asm/module_84_thumb1.s
@@ -29,7 +29,7 @@ _021D74FC:
 	ldr r1, _021D7670 ; =0x00001244
 	add r0, r6, #0
 	mov r2, #0x4b
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	bne _021D7516
 	b _021D7618
@@ -51,7 +51,7 @@ _021D7516:
 	and r0, r1
 	str r0, [r2]
 	add r0, r6, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4, #0x18]
 	mov r0, #0
 	str r0, [r4, #0x1c]
@@ -149,7 +149,7 @@ _021D7618:
 	str r0, [r5]
 	b _021D7668
 _021D7620:
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r2, _021D7684 ; =0x021DA6C8
 	ldr r1, _021D768C ; =0x0000122C
 	add r4, r0, #0
@@ -208,7 +208,7 @@ MOD84_021D76A4: ; 0x021D76A4
 	push {r4, r5, r6, lr}
 	add r4, r1, #0
 	add r6, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r5, r0, #0
 	ldr r0, [r4]
 	cmp r0, #3
@@ -267,7 +267,7 @@ _021D771A:
 	b _021D773E
 _021D772E:
 	add r0, r6, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x4b
 	bl FUN_020168D0
 	mov r0, #1
@@ -284,7 +284,7 @@ MOD84_021D7748: ; 0x021D7748
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r4, r0, #0
 	ldr r0, [r4, #8]
 	mov r1, #1
diff --git a/arm9/modules/85/asm/module_85.s b/arm9/modules/85/asm/module_85.s
index c40d4f3b..e7e4e431 100644
--- a/arm9/modules/85/asm/module_85.s
+++ b/arm9/modules/85/asm/module_85.s
@@ -22,7 +22,7 @@ MOD85_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	mov r1, #8
 	mov r2, #0x4f
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	add r4, r0, #0
 	mov r0, #0
 	strb r0, [r4]
@@ -34,7 +34,7 @@ MOD85_021D74E0: ; 0x021D74E0
 	strb r0, [r4, #6]
 	strb r0, [r4, #7]
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	str r0, [r4]
 	bl MOD85_021D76CC
 	add r5, r0, #0
@@ -86,7 +86,7 @@ MOD85_021D75A0: ; 0x021D75A0
 	push {r4, r5, lr}
 	sub sp, #0xc
 	add r4, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r5, [r0, #4]
 	ldr r0, [r4]
 	cmp r0, #3
@@ -167,7 +167,7 @@ _021D7640: .word 0x0000044C
 MOD85_021D7644: ; 0x021D7644
 	push {r4, r5, r6, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	mov r0, #0
 	ldr r4, [r6, #4]
@@ -191,7 +191,7 @@ MOD85_021D7644: ; 0x021D7644
 	add r0, r4, #0
 	bl MOD85_021D76F4
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	mov r0, #0x4f
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/modules/86/asm/module_86.s b/arm9/modules/86/asm/module_86.s
index 37b0b5f6..28089fba 100644
--- a/arm9/modules/86/asm/module_86.s
+++ b/arm9/modules/86/asm/module_86.s
@@ -15,7 +15,7 @@ MOD86_021D74E0: ; 0x021D74E0
 	add r0, r5, #0
 	mov r1, #0x44
 	mov r2, #0x54
-	bl FUN_02006268
+	bl OverlayManager_CreateAndGetData
 	mov r1, #0
 	mov r2, #0x44
 	add r4, r0, #0
@@ -23,7 +23,7 @@ MOD86_021D74E0: ; 0x021D74E0
 	mov r0, #0x54
 	str r0, [r4]
 	add r0, r5, #0
-	bl FUN_0200628C
+	bl OverlayManager_GetField18
 	ldr r1, [r0]
 	str r1, [r4, #8]
 	ldr r0, [r0, #4]
@@ -79,7 +79,7 @@ MOD86_021D758C: ; 0x021D758C
 	push {r3, r4, r5, r6, lr}
 	sub sp, #0xc
 	add r5, r1, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	ldr r1, [r5]
 	add r4, r0, #0
 	mov r6, #0
@@ -221,7 +221,7 @@ _021D76AC: .word UNK_021C48F8
 MOD86_021D76B0: ; 0x021D76B0
 	push {r4, r5, r6, lr}
 	add r5, r0, #0
-	bl FUN_02006278
+	bl OverlayManager_GetData
 	add r6, r0, #0
 	ldr r4, [r6]
 	bl MOD86_021D7964
@@ -231,7 +231,7 @@ MOD86_021D76B0: ; 0x021D76B0
 	add r1, r0, #0
 	bl FUN_02015F10
 	add r0, r5, #0
-	bl FUN_0200627C
+	bl OverlayManager_FreeData
 	add r0, r4, #0
 	bl FUN_020168D0
 	mov r0, #1
diff --git a/arm9/src/main.c b/arm9/src/main.c
index a81db33d..050aa5f0 100644
--- a/arm9/src/main.c
+++ b/arm9/src/main.c
@@ -16,9 +16,9 @@ FS_EXTERN_OVERLAY(MODULE_63);
 
 struct Unk2106FA0 gBacklightTop;
 
-extern BOOL FUN_02006234(struct Unk21DBE18 *, s32 *, int);
-extern BOOL FUN_02006290(int);
-extern void FUN_02006260(int);
+extern BOOL OverlayManager_new(struct Unk21DBE18 *, s32 *, int);
+extern BOOL OverlayManager_Run(int);
+extern void OverlayManager_delete(int);
 extern BOOL FUN_02033678(void);
 extern u32 FUN_020335B8(void);
 extern BOOL FUN_0202FB80(void);
@@ -89,12 +89,12 @@ THUMB_FUNC void NitroMain(void)
         case 0:
             // Title Demo
             gBacklightTop.unk1C = 0;
-            FUN_02000E7C(FS_OVERLAY_ID(MODULE_63), &MOD63_021DBE18);
+            RegisterMainOverlay(FS_OVERLAY_ID(MODULE_63), &MOD63_021DBE18);
             break;
         case 1:
             // Reset transition?
             gBacklightTop.unk1C = 1;
-            FUN_02000E7C(FS_OVERLAY_ID(MODULE_52), &MOD52_021D76C8);
+            RegisterMainOverlay(FS_OVERLAY_ID(MODULE_52), &MOD52_021D76C8);
             break;
         default:
             GF_ASSERT(0);
@@ -118,7 +118,7 @@ THUMB_FUNC void NitroMain(void)
         }
         if (FUN_0202FB80())
         {
-            FUN_02000E0C();
+            Main_RunOverlayManager();
             FUN_0201B5CC(gMain.unk18);
             FUN_0201B5CC(gMain.unk24);
             if (!gMain.unk30)
@@ -151,7 +151,7 @@ THUMB_FUNC void FUN_02000DF4(void)
     gBacklightTop.unk14 = NULL;
 }
 
-THUMB_FUNC void FUN_02000E0C(void)
+THUMB_FUNC void Main_RunOverlayManager(void)
 {
     if (!gBacklightTop.unkC)
     {
@@ -160,20 +160,20 @@ THUMB_FUNC void FUN_02000E0C(void)
         if (gBacklightTop.unk10 != SDK_OVERLAY_INVALID_ID)
             HandleLoadOverlay(gBacklightTop.unk10, 0);
         gBacklightTop.unk8 = gBacklightTop.unk10;
-        gBacklightTop.unkC = FUN_02006234(gBacklightTop.unk14, &gBacklightTop.unk18, 0);
+        gBacklightTop.unkC = OverlayManager_new(gBacklightTop.unk14, &gBacklightTop.unk18, 0);
         gBacklightTop.unk10 = SDK_OVERLAY_INVALID_ID;
         gBacklightTop.unk14 = NULL;
     }
-    if (FUN_02006290(gBacklightTop.unkC))
+    if (OverlayManager_Run(gBacklightTop.unkC))
     {
-        FUN_02006260(gBacklightTop.unkC);
+        OverlayManager_delete(gBacklightTop.unkC);
         gBacklightTop.unkC = 0;
         if (gBacklightTop.unk8 != SDK_OVERLAY_INVALID_ID)
             UnloadOverlayByID(gBacklightTop.unk8);
     }
 }
 
-THUMB_FUNC void FUN_02000E7C(FSOverlayID id, struct Unk21DBE18 * arg1)
+THUMB_FUNC void RegisterMainOverlay(FSOverlayID id, struct Unk21DBE18 * arg1)
 {
     if (gBacklightTop.unk14 != NULL)
         ErrorHandling();
diff --git a/arm9/src/unk_02006234.c b/arm9/src/unk_02006234.c
index af93ed3e..a493311d 100644
--- a/arm9/src/unk_02006234.c
+++ b/arm9/src/unk_02006234.c
@@ -3,15 +3,15 @@
 #include "poke_overlay.h"
 #include "heap.h"
 
-struct UnkStruct_02006234 * FUN_02006234(struct Unk21DBE18 * ovly_mgr, int * a1, u32 heap_id); //todo header?
-void FUN_02006260(struct UnkStruct_02006234 * a0);
-void * FUN_02006268(struct UnkStruct_02006234 * a0, u32 size, u32 heap_id);
-void * FUN_02006278(struct UnkStruct_02006234 * a0);
-void FUN_0200627C(struct UnkStruct_02006234 * a0);
-int * FUN_0200628C(struct UnkStruct_02006234 * a0);
-BOOL FUN_02006290(struct UnkStruct_02006234 * a0);
+struct UnkStruct_02006234 * OverlayManager_new(struct Unk21DBE18 * ovly_mgr, int * a1, u32 heap_id); //todo header?
+void OverlayManager_delete(struct UnkStruct_02006234 * a0);
+void * OverlayManager_CreateAndGetData(struct UnkStruct_02006234 * a0, u32 size, u32 heap_id);
+void * OverlayManager_GetData(struct UnkStruct_02006234 * a0);
+void OverlayManager_FreeData(struct UnkStruct_02006234 * a0);
+int * OverlayManager_GetField18(struct UnkStruct_02006234 * a0);
+BOOL OverlayManager_Run(struct UnkStruct_02006234 * a0);
 
-THUMB_FUNC struct UnkStruct_02006234 * FUN_02006234(struct Unk21DBE18 * ovly_mgr, int * a1, u32 heap_id)
+THUMB_FUNC struct UnkStruct_02006234 * OverlayManager_new(struct Unk21DBE18 * ovly_mgr, int * a1, u32 heap_id)
 {
     struct UnkStruct_02006234 * ret = (struct UnkStruct_02006234 *)AllocFromHeap(heap_id, sizeof(struct UnkStruct_02006234));
     ret->ovly_mgr = *ovly_mgr;
@@ -24,33 +24,33 @@ THUMB_FUNC struct UnkStruct_02006234 * FUN_02006234(struct Unk21DBE18 * ovly_mgr
     return ret;
 }
 
-THUMB_FUNC void FUN_02006260(struct UnkStruct_02006234 * a0)
+THUMB_FUNC void OverlayManager_delete(struct UnkStruct_02006234 * a0)
 {
     FreeToHeap(a0);
 }
 
-THUMB_FUNC void * FUN_02006268(struct UnkStruct_02006234 * a0, u32 size, u32 heap_id)
+THUMB_FUNC void * OverlayManager_CreateAndGetData(struct UnkStruct_02006234 * a0, u32 size, u32 heap_id)
 {
     return a0->unk1C = AllocFromHeap(heap_id, size);
 }
 
-THUMB_FUNC void * FUN_02006278(struct UnkStruct_02006234 * a0)
+THUMB_FUNC void * OverlayManager_GetData(struct UnkStruct_02006234 * a0)
 {
     return a0->unk1C;
 }
 
-THUMB_FUNC void FUN_0200627C(struct UnkStruct_02006234 * a0)
+THUMB_FUNC void OverlayManager_FreeData(struct UnkStruct_02006234 * a0)
 {
     FreeToHeap(a0->unk1C);
     a0->unk1C = NULL;
 }
 
-THUMB_FUNC int * FUN_0200628C(struct UnkStruct_02006234 * a0)
+THUMB_FUNC int * OverlayManager_GetField18(struct UnkStruct_02006234 * a0)
 {
     return a0->unk18;
 }
 
-THUMB_FUNC BOOL FUN_02006290(struct UnkStruct_02006234 * a0)
+THUMB_FUNC BOOL OverlayManager_Run(struct UnkStruct_02006234 * a0)
 {
     switch (a0->unk10)
     {
diff --git a/include/main.h b/include/main.h
index a01f06ce..fa31953c 100644
--- a/include/main.h
+++ b/include/main.h
@@ -97,8 +97,8 @@ void NitroMain(void);
 extern struct Unk21C48B8 gMain;
 
 void FUN_02000DF4(void);
-void FUN_02000E0C(void);
-void FUN_02000E7C(FSOverlayID id, struct Unk21DBE18 * arg1);
+void Main_RunOverlayManager(void);
+void RegisterMainOverlay(FSOverlayID id, struct Unk21DBE18 * arg1);
 void FUN_02000E9C(void);
 void FUN_02000EC8(u32 parameter);
 void FUN_02000EE8(void);