unk_815C980

10 files changed, 479 insertions, 1332 deletions

diff --git a/asm/decompress.s b/asm/decompress.s
index 175304245..cc38e0df5 100644
--- a/asm/decompress.s
+++ b/asm/decompress.s
@@ -722,8 +722,8 @@ _0800F0BA:
 	bx r1
 	thumb_func_end sub_800F078
 
-	thumb_func_start sub_800F0C4
-sub_800F0C4: @ 800F0C4
+	thumb_func_start GetDecompressedDataSize
+GetDecompressedDataSize: @ 800F0C4
 	sub sp, 0x4
 	mov r3, sp
 	ldrb r2, [r0, 0x1]
@@ -738,7 +738,7 @@ sub_800F0C4: @ 800F0C4
 	ldr r0, [sp]
 	add sp, 0x4
 	bx lr
-	thumb_func_end sub_800F0C4
+	thumb_func_end GetDecompressedDataSize
 
 	thumb_func_start DecompressPicFromTable_DontHandleDeoxys
 DecompressPicFromTable_DontHandleDeoxys: @ 800F0E0
diff --git a/asm/unk_815C27C.s b/asm/ereader_helpers.s
index 067ab8659..067ab8659 100644
--- a/asm/unk_815C27C.s
+++ b/asm/ereader_helpers.s
diff --git a/asm/unk_815C980.s b/asm/unk_815C980.s
deleted file mode 100644
index a348558f3..000000000
--- a/asm/unk_815C980.s
+++ /dev/null
@@ -1,1314 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start sub_815C980
-sub_815C980: @ 815C980
-	push {r4-r7,lr}
-	adds r4, r0, 0
-	ldr r5, _0815C9A0 @ =gUnknown_203F454
-	ldr r0, [r5]
-	cmp r0, 0
-	beq _0815C990
-	bl sub_815C9F4
-_0815C990:
-	movs r0, 0x8
-	bl Alloc
-	str r0, [r5]
-	cmp r0, 0
-	bne _0815C9A4
-	movs r0, 0
-	b _0815C9EC
-	.align 2, 0
-_0815C9A0: .4byte gUnknown_203F454
-_0815C9A4:
-	lsls r0, r4, 3
-	subs r0, r4
-	lsls r0, 2
-	bl Alloc
-	ldr r1, [r5]
-	str r0, [r1, 0x4]
-	cmp r0, 0
-	bne _0815C9C0
-	adds r0, r1, 0
-	bl Free
-	movs r0, 0
-	b _0815C9EC
-_0815C9C0:
-	str r4, [r1]
-	movs r3, 0
-	cmp r3, r4
-	bcs _0815C9EA
-	movs r7, 0
-	movs r6, 0xFF
-	movs r2, 0
-_0815C9CE:
-	ldr r0, [r5]
-	ldr r0, [r0, 0x4]
-	adds r0, r2, r0
-	strb r7, [r0]
-	ldr r0, [r5]
-	ldr r1, [r0, 0x4]
-	adds r1, r2, r1
-	ldrb r0, [r1, 0x1]
-	orrs r0, r6
-	strb r0, [r1, 0x1]
-	adds r2, 0x1C
-	adds r3, 0x1
-	cmp r3, r4
-	bcc _0815C9CE
-_0815C9EA:
-	movs r0, 0x1
-_0815C9EC:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_815C980
-
-	thumb_func_start sub_815C9F4
-sub_815C9F4: @ 815C9F4
-	push {r4,r5,lr}
-	ldr r2, _0815CA3C @ =gUnknown_203F454
-	ldr r1, [r2]
-	cmp r1, 0
-	beq _0815CA34
-	ldr r0, [r1, 0x4]
-	cmp r0, 0
-	beq _0815CA28
-	movs r4, 0
-	ldr r0, [r1]
-	cmp r4, r0
-	bcs _0815CA1E
-	adds r5, r2, 0
-_0815CA0E:
-	adds r0, r4, 0
-	bl sub_815D108
-	adds r4, 0x1
-	ldr r0, [r5]
-	ldr r0, [r0]
-	cmp r4, r0
-	bcc _0815CA0E
-_0815CA1E:
-	ldr r0, _0815CA3C @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r0, [r0, 0x4]
-	bl Free
-_0815CA28:
-	ldr r4, _0815CA3C @ =gUnknown_203F454
-	ldr r0, [r4]
-	bl Free
-	movs r0, 0
-	str r0, [r4]
-_0815CA34:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0815CA3C: .4byte gUnknown_203F454
-	thumb_func_end sub_815C9F4
-
-	thumb_func_start sub_815CA40
-sub_815CA40: @ 815CA40
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x8
-	mov r8, r0
-	mov r10, r1
-	adds r5, r2, 0
-	ldr r6, _0815CAB8 @ =gUnknown_203F454
-	ldr r0, [r6]
-	cmp r0, 0
-	beq _0815CB00
-	ldr r1, [r0, 0x4]
-	mov r0, r8
-	lsls r2, r0, 3
-	subs r0, r2, r0
-	lsls r4, r0, 2
-	adds r1, r4, r1
-	ldrb r0, [r1]
-	mov r9, r2
-	cmp r0, 0
-	bne _0815CB00
-	ldrb r0, [r5, 0x1]
-	bl sub_815D244
-	ldr r1, [r6]
-	ldr r1, [r1, 0x4]
-	adds r1, r4, r1
-	strb r0, [r1, 0x1]
-	ldr r0, [r6]
-	ldr r0, [r0, 0x4]
-	adds r0, r4, r0
-	ldrb r0, [r0, 0x1]
-	cmp r0, 0xFF
-	beq _0815CB00
-	ldr r0, [r5, 0x8]
-	ldrh r0, [r0, 0x6]
-	bl GetSpriteTileStartByTag
-	ldr r2, [r6]
-	ldr r1, [r2, 0x4]
-	adds r1, r4, r1
-	strh r0, [r1, 0xA]
-	ldr r0, [r2, 0x4]
-	adds r0, r4, r0
-	ldrh r1, [r0, 0xA]
-	ldr r7, _0815CABC @ =0xffff0000
-	lsrs r0, r7, 16
-	cmp r1, r0
-	bne _0815CB0C
-	ldr r2, [r5, 0x8]
-	ldrh r0, [r2, 0x4]
-	adds r1, r2, 0
-	cmp r0, 0
-	beq _0815CAC0
-	adds r0, r1, 0
-	bl LoadSpriteSheet
-	b _0815CAE0
-	.align 2, 0
-_0815CAB8: .4byte gUnknown_203F454
-_0815CABC: .4byte 0xffff0000
-_0815CAC0:
-	ldr r0, [r2]
-	ldr r1, [r2, 0x4]
-	str r0, [sp]
-	str r1, [sp, 0x4]
-	ldr r0, [r2]
-	bl sub_800F0C4
-	lsls r0, 16
-	lsrs r0, 16
-	ldr r1, [sp, 0x4]
-	ands r1, r7
-	orrs r1, r0
-	str r1, [sp, 0x4]
-	mov r0, sp
-	bl LoadCompressedObjectPic
-_0815CAE0:
-	ldr r1, [r6]
-	ldr r1, [r1, 0x4]
-	adds r1, r4, r1
-	strh r0, [r1, 0xA]
-	ldr r0, _0815CB04 @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r1, [r0, 0x4]
-	mov r2, r9
-	mov r3, r8
-	subs r0, r2, r3
-	lsls r0, 2
-	adds r0, r1
-	ldrh r1, [r0, 0xA]
-	ldr r0, _0815CB08 @ =0x0000ffff
-	cmp r1, r0
-	bne _0815CB0C
-_0815CB00:
-	movs r0, 0
-	b _0815CC14
-	.align 2, 0
-_0815CB04: .4byte gUnknown_203F454
-_0815CB08: .4byte 0x0000ffff
-_0815CB0C:
-	ldr r0, [r5, 0xC]
-	ldrh r0, [r0, 0x4]
-	bl IndexOfSpritePaletteTag
-	ldr r6, _0815CC24 @ =gUnknown_203F454
-	ldr r1, [r6]
-	ldr r1, [r1, 0x4]
-	mov r4, r9
-	mov r3, r8
-	subs r2, r4, r3
-	lsls r4, r2, 2
-	adds r1, r4, r1
-	strb r0, [r1, 0x4]
-	ldr r0, [r6]
-	ldr r0, [r0, 0x4]
-	adds r0, r4, r0
-	ldrb r0, [r0, 0x4]
-	cmp r0, 0xFF
-	bne _0815CB40
-	ldr r0, [r5, 0xC]
-	bl LoadSpritePalette
-	ldr r1, [r6]
-	ldr r1, [r1, 0x4]
-	adds r1, r4, r1
-	strb r0, [r1, 0x4]
-_0815CB40:
-	ldr r0, [r6]
-	ldr r1, [r0, 0x4]
-	adds r1, r4, r1
-	ldrb r0, [r5]
-	lsls r0, 30
-	lsrs r0, 30
-	strb r0, [r1, 0x2]
-	ldr r0, [r6]
-	ldr r0, [r0, 0x4]
-	adds r0, r4, r0
-	ldrb r1, [r5, 0x1]
-	strb r1, [r0, 0x3]
-	ldr r2, [r6]
-	ldr r0, [r2, 0x4]
-	adds r0, r4, r0
-	ldrh r1, [r5, 0x4]
-	strh r1, [r0, 0xC]
-	ldr r0, [r2, 0x4]
-	adds r0, r4, r0
-	ldrh r1, [r5, 0x6]
-	strh r1, [r0, 0xE]
-	ldr r1, [r2, 0x4]
-	adds r1, r4, r1
-	ldrb r0, [r5]
-	lsls r0, 28
-	lsrs r0, 30
-	strb r0, [r1, 0x6]
-	ldr r0, [r6]
-	ldr r1, [r0, 0x4]
-	adds r1, r4, r1
-	ldrb r0, [r5]
-	lsls r0, 26
-	lsrs r0, 30
-	strb r0, [r1, 0x5]
-	ldr r0, [r6]
-	ldr r1, [r0, 0x4]
-	adds r1, r4, r1
-	ldrb r0, [r5]
-	lsrs r0, 6
-	strb r0, [r1, 0x7]
-	ldr r0, [r6]
-	ldr r0, [r0, 0x4]
-	adds r0, r4, r0
-	ldrb r1, [r5, 0x2]
-	strb r1, [r0, 0x8]
-	ldrb r1, [r5]
-	lsls r0, r1, 28
-	lsrs r0, 30
-	lsls r1, 26
-	lsrs r1, 30
-	bl sub_815D324
-	ldr r1, [r6]
-	ldr r1, [r1, 0x4]
-	adds r1, r4, r1
-	strb r0, [r1, 0x9]
-	ldr r2, [r6]
-	ldr r0, [r2, 0x4]
-	adds r0, r4, r0
-	ldr r1, [r5, 0x8]
-	ldrh r1, [r1, 0x6]
-	strh r1, [r0, 0x10]
-	ldr r0, [r2, 0x4]
-	adds r0, r4, r0
-	ldr r1, [r5, 0xC]
-	ldrh r1, [r1, 0x4]
-	strh r1, [r0, 0x12]
-	ldr r0, [r2, 0x4]
-	adds r0, r4, r0
-	movs r1, 0x1
-	strb r1, [r0]
-	ldr r0, [r6]
-	ldr r0, [r0, 0x4]
-	adds r0, r4, r0
-	str r1, [r0, 0x14]
-	movs r3, 0x1
-	ldrb r0, [r5, 0x1]
-	cmp r3, r0
-	bcs _0815CBF6
-_0815CBDE:
-	ldr r0, [r6]
-	ldr r2, [r0, 0x4]
-	adds r2, r4, r2
-	ldr r1, [r2, 0x14]
-	lsls r0, r1, 2
-	adds r0, r1
-	lsls r0, 1
-	str r0, [r2, 0x14]
-	adds r3, 0x1
-	ldrb r2, [r5, 0x1]
-	cmp r3, r2
-	bcc _0815CBDE
-_0815CBF6:
-	ldr r0, _0815CC24 @ =gUnknown_203F454
-	ldr r0, [r0]
-	mov r3, r9
-	mov r4, r8
-	subs r1, r3, r4
-	lsls r1, 2
-	ldr r0, [r0, 0x4]
-	adds r0, r1
-	bl sub_815CC28
-	mov r0, r8
-	mov r1, r10
-	bl sub_815CD70
-	movs r0, 0x1
-_0815CC14:
-	add sp, 0x8
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_0815CC24: .4byte gUnknown_203F454
-	thumb_func_end sub_815CA40
-
-	thumb_func_start sub_815CC28
-sub_815CC28: @ 815CC28
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x4
-	adds r4, r0, 0
-	ldrb r5, [r4, 0x1]
-	movs r0, 0xC
-	ldrsh r7, [r4, r0]
-	ldrb r0, [r4, 0x3]
-	adds r0, 0x1
-	mov r8, r0
-	mov r1, sp
-	movs r0, 0
-	strh r0, [r1]
-	lsls r1, r5, 3
-	ldr r2, _0815CD58 @ =gMain + 0x38
-	mov r9, r2
-	add r1, r9
-	mov r0, r8
-	lsls r2, r0, 2
-	movs r0, 0x80
-	lsls r0, 17
-	orrs r2, r0
-	mov r0, sp
-	bl CpuSet
-	movs r6, 0
-	ldrb r5, [r4, 0x1]
-	cmp r6, r8
-	bcs _0815CCFA
-	movs r1, 0x3F
-	mov r10, r1
-	movs r2, 0xD
-	negs r2, r2
-	mov r9, r2
-_0815CC72:
-	lsls r0, r5, 3
-	ldr r1, _0815CD5C @ =gMain
-	adds r3, r0, r1
-	ldrh r1, [r4, 0xE]
-	adds r0, r3, 0
-	adds r0, 0x38
-	strb r1, [r0]
-	ldr r2, _0815CD60 @ =0x000001ff
-	adds r0, r2, 0
-	adds r1, r7, 0
-	ands r1, r0
-	ldrh r2, [r3, 0x3A]
-	ldr r0, _0815CD64 @ =0xfffffe00
-	ands r0, r2
-	orrs r0, r1
-	strh r0, [r3, 0x3A]
-	ldrb r1, [r4, 0x6]
-	movs r0, 0x39
-	adds r0, r3
-	mov r12, r0
-	lsls r1, 6
-	ldrb r2, [r0]
-	mov r0, r10
-	ands r0, r2
-	orrs r0, r1
-	mov r1, r12
-	strb r0, [r1]
-	ldrb r1, [r4, 0x5]
-	movs r2, 0x3B
-	adds r2, r3
-	mov r12, r2
-	lsls r1, 6
-	ldrb r2, [r2]
-	mov r0, r10
-	ands r0, r2
-	orrs r0, r1
-	mov r1, r12
-	strb r0, [r1]
-	ldrh r0, [r4, 0xA]
-	ldr r1, _0815CD68 @ =0x000003ff
-	ands r1, r0
-	ldrh r2, [r3, 0x3C]
-	ldr r0, _0815CD6C @ =0xfffffc00
-	ands r0, r2
-	orrs r0, r1
-	strh r0, [r3, 0x3C]
-	adds r3, 0x3D
-	movs r0, 0x3
-	ldrb r1, [r4, 0x7]
-	ands r1, r0
-	lsls r1, 2
-	ldrb r2, [r3]
-	mov r0, r9
-	ands r0, r2
-	orrs r0, r1
-	strb r0, [r3]
-	ldrb r2, [r4, 0x4]
-	lsls r2, 4
-	movs r1, 0xF
-	ands r0, r1
-	orrs r0, r2
-	strb r0, [r3]
-	ldrb r0, [r4, 0x8]
-	adds r7, r0
-	adds r6, 0x1
-	adds r5, 0x1
-	cmp r6, r8
-	bcc _0815CC72
-_0815CCFA:
-	subs r5, 0x1
-	ldr r0, _0815CD5C @ =gMain
-	lsls r3, r5, 3
-	adds r3, r0
-	movs r2, 0xC
-	ldrsh r1, [r4, r2]
-	ldrb r0, [r4, 0x8]
-	subs r1, r0
-	ldr r2, _0815CD60 @ =0x000001ff
-	adds r0, r2, 0
-	ands r1, r0
-	ldrh r2, [r3, 0x3A]
-	ldr r0, _0815CD64 @ =0xfffffe00
-	ands r0, r2
-	orrs r0, r1
-	strh r0, [r3, 0x3A]
-	adds r2, r3, 0
-	adds r2, 0x39
-	ldrb r1, [r2]
-	movs r0, 0x4
-	negs r0, r0
-	ands r0, r1
-	movs r1, 0x2
-	orrs r0, r1
-	strb r0, [r2]
-	ldrb r0, [r4, 0x9]
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 1
-	ldrh r4, [r4, 0xA]
-	adds r1, r4
-	ldr r2, _0815CD68 @ =0x000003ff
-	adds r0, r2, 0
-	ands r1, r0
-	ldrh r2, [r3, 0x3C]
-	ldr r0, _0815CD6C @ =0xfffffc00
-	ands r0, r2
-	orrs r0, r1
-	strh r0, [r3, 0x3C]
-	add sp, 0x4
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0815CD58: .4byte gMain + 0x38
-_0815CD5C: .4byte gMain
-_0815CD60: .4byte 0x000001ff
-_0815CD64: .4byte 0xfffffe00
-_0815CD68: .4byte 0x000003ff
-_0815CD6C: .4byte 0xfffffc00
-	thumb_func_end sub_815CC28
-
-	thumb_func_start sub_815CD70
-sub_815CD70: @ 815CD70
-	push {r4-r6,lr}
-	adds r3, r0, 0
-	adds r4, r1, 0
-	ldr r0, _0815CDA0 @ =gUnknown_203F454
-	ldr r1, [r0]
-	adds r6, r0, 0
-	cmp r1, 0
-	beq _0815CDD4
-	ldr r2, [r1, 0x4]
-	lsls r1, r3, 3
-	subs r0, r1, r3
-	lsls r0, 2
-	adds r2, r0, r2
-	ldrb r0, [r2]
-	adds r5, r1, 0
-	cmp r0, 0
-	beq _0815CDD4
-	str r4, [r2, 0x18]
-	cmp r4, 0
-	bge _0815CDA4
-	movs r2, 0x1
-	negs r4, r4
-	b _0815CDA6
-	.align 2, 0
-_0815CDA0: .4byte gUnknown_203F454
-_0815CDA4:
-	movs r2, 0
-_0815CDA6:
-	ldr r0, [r6]
-	ldr r1, [r0, 0x4]
-	subs r0, r5, r3
-	lsls r0, 2
-	adds r0, r1
-	ldrb r3, [r0, 0x2]
-	cmp r3, 0x1
-	beq _0815CDC6
-	cmp r3, 0x1
-	ble _0815CDBE
-	cmp r3, 0x2
-	beq _0815CDCE
-_0815CDBE:
-	adds r1, r4, 0
-	bl sub_815CDDC
-	b _0815CDD4
-_0815CDC6:
-	adds r1, r4, 0
-	bl sub_815CE90
-	b _0815CDD4
-_0815CDCE:
-	adds r1, r4, 0
-	bl sub_815CFEC
-_0815CDD4:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_815CD70
-
-	thumb_func_start sub_815CDDC
-sub_815CDDC: @ 815CDDC
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x4
-	mov r8, r0
-	mov r9, r1
-	str r2, [sp]
-	ldr r5, [r0, 0x14]
-	ldrb r7, [r0, 0x1]
-	ldr r0, _0815CE60 @ =gMain
-	mov r10, r0
-	cmp r5, 0
-	beq _0815CE46
-	lsls r0, r7, 3
-	adds r0, 0x3C
-	mov r1, r10
-	adds r6, r0, r1
-_0815CE02:
-	mov r0, r9
-	adds r1, r5, 0
-	bl __udivsi3
-	adds r4, r0, 0
-	adds r0, r4, 0
-	muls r0, r5
-	mov r2, r9
-	subs r2, r0
-	mov r9, r2
-	adds r0, r5, 0
-	movs r1, 0xA
-	bl __udivsi3
-	adds r5, r0, 0
-	mov r1, r8
-	ldrb r0, [r1, 0x9]
-	adds r1, r4, 0
-	muls r1, r0
-	mov r2, r8
-	ldrh r2, [r2, 0xA]
-	adds r1, r2
-	ldr r2, _0815CE64 @ =0x000003ff
-	adds r0, r2, 0
-	ands r1, r0
-	ldrh r0, [r6]
-	ldr r2, _0815CE68 @ =0xfffffc00
-	ands r0, r2
-	orrs r0, r1
-	strh r0, [r6]
-	adds r6, 0x8
-	adds r7, 0x1
-	cmp r5, 0
-	bne _0815CE02
-_0815CE46:
-	ldr r0, [sp]
-	cmp r0, 0
-	beq _0815CE6C
-	lsls r0, r7, 3
-	add r0, r10
-	adds r0, 0x39
-	ldrb r2, [r0]
-	movs r1, 0x4
-	negs r1, r1
-	ands r1, r2
-	strb r1, [r0]
-	b _0815CE80
-	.align 2, 0
-_0815CE60: .4byte gMain
-_0815CE64: .4byte 0x000003ff
-_0815CE68: .4byte 0xfffffc00
-_0815CE6C:
-	lsls r2, r7, 3
-	add r2, r10
-	adds r2, 0x39
-	ldrb r1, [r2]
-	movs r0, 0x4
-	negs r0, r0
-	ands r0, r1
-	movs r1, 0x2
-	orrs r0, r1
-	strb r0, [r2]
-_0815CE80:
-	add sp, 0x4
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_815CDDC
-
-	thumb_func_start sub_815CE90
-sub_815CE90: @ 815CE90
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0x4
-	adds r6, r0, 0
-	mov r8, r1
-	str r2, [sp]
-	ldr r5, [r6, 0x14]
-	ldr r3, _0815CF38 @ =gUnknown_3002078
-	ldrb r0, [r6, 0x1]
-	str r0, [r3]
-	ldr r2, _0815CF3C @ =gUnknown_300207C
-	movs r0, 0
-	str r0, [r2]
-	ldr r1, _0815CF40 @ =gUnknown_3002080
-	subs r0, 0x1
-	str r0, [r1]
-	adds r7, r3, 0
-	mov r10, r1
-	ldr r0, _0815CF44 @ =gMain
-	mov r9, r0
-	cmp r5, 0
-	beq _0815CF78
-_0815CEC2:
-	mov r0, r8
-	adds r1, r5, 0
-	bl __udivsi3
-	adds r4, r0, 0
-	adds r0, r4, 0
-	muls r0, r5
-	mov r1, r8
-	subs r1, r0
-	mov r8, r1
-	adds r0, r5, 0
-	movs r1, 0xA
-	bl __udivsi3
-	adds r5, r0, 0
-	cmp r4, 0
-	bne _0815CEF4
-	mov r2, r10
-	ldr r1, [r2]
-	movs r0, 0x1
-	negs r0, r0
-	cmp r1, r0
-	bne _0815CEF4
-	cmp r5, 0
-	bne _0815CF50
-_0815CEF4:
-	ldr r2, [r7]
-	lsls r2, 3
-	add r2, r9
-	ldrb r0, [r6, 0x9]
-	adds r3, r4, 0
-	muls r3, r0
-	ldrh r4, [r6, 0xA]
-	adds r3, r4
-	ldr r1, _0815CF48 @ =0x000003ff
-	adds r0, r1, 0
-	ands r3, r0
-	ldrh r0, [r2, 0x3C]
-	ldr r4, _0815CF4C @ =0xfffffc00
-	adds r1, r4, 0
-	ands r0, r1
-	orrs r0, r3
-	strh r0, [r2, 0x3C]
-	adds r2, 0x39
-	ldrb r0, [r2]
-	movs r1, 0x4
-	negs r1, r1
-	ands r0, r1
-	strb r0, [r2]
-	mov r2, r10
-	ldr r1, [r2]
-	movs r0, 0x1
-	negs r0, r0
-	cmp r1, r0
-	bne _0815CF66
-	ldr r4, _0815CF3C @ =gUnknown_300207C
-	ldr r0, [r4]
-	str r0, [r2]
-	b _0815CF66
-	.align 2, 0
-_0815CF38: .4byte gUnknown_3002078
-_0815CF3C: .4byte gUnknown_300207C
-_0815CF40: .4byte gUnknown_3002080
-_0815CF44: .4byte gMain
-_0815CF48: .4byte 0x000003ff
-_0815CF4C: .4byte 0xfffffc00
-_0815CF50:
-	ldr r0, [r7]
-	lsls r0, 3
-	add r0, r9
-	adds r0, 0x39
-	ldrb r1, [r0]
-	movs r2, 0x4
-	negs r2, r2
-	ands r1, r2
-	movs r2, 0x2
-	orrs r1, r2
-	strb r1, [r0]
-_0815CF66:
-	ldr r0, [r7]
-	adds r0, 0x1
-	str r0, [r7]
-	ldr r4, _0815CFB8 @ =gUnknown_300207C
-	ldr r0, [r4]
-	adds r0, 0x1
-	str r0, [r4]
-	cmp r5, 0
-	bne _0815CEC2
-_0815CF78:
-	ldr r0, [sp]
-	cmp r0, 0
-	beq _0815CFC4
-	ldr r1, [r7]
-	lsls r1, 3
-	add r1, r9
-	adds r1, 0x39
-	ldrb r2, [r1]
-	movs r0, 0x4
-	negs r0, r0
-	ands r0, r2
-	strb r0, [r1]
-	ldr r3, [r7]
-	lsls r3, 3
-	add r3, r9
-	movs r1, 0xC
-	ldrsh r2, [r6, r1]
-	mov r4, r10
-	ldr r0, [r4]
-	subs r0, 0x1
-	ldrb r1, [r6, 0x8]
-	muls r0, r1
-	adds r2, r0
-	ldr r1, _0815CFBC @ =0x000001ff
-	adds r0, r1, 0
-	ands r2, r0
-	ldrh r1, [r3, 0x3A]
-	ldr r0, _0815CFC0 @ =0xfffffe00
-	ands r0, r1
-	orrs r0, r2
-	strh r0, [r3, 0x3A]
-	b _0815CFDA
-	.align 2, 0
-_0815CFB8: .4byte gUnknown_300207C
-_0815CFBC: .4byte 0x000001ff
-_0815CFC0: .4byte 0xfffffe00
-_0815CFC4:
-	ldr r0, [r7]
-	lsls r0, 3
-	add r0, r9
-	adds r0, 0x39
-	ldrb r2, [r0]
-	movs r1, 0x4
-	negs r1, r1
-	ands r1, r2
-	movs r2, 0x2
-	orrs r1, r2
-	strb r1, [r0]
-_0815CFDA:
-	add sp, 0x4
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_815CE90
-
-	thumb_func_start sub_815CFEC
-sub_815CFEC: @ 815CFEC
-	push {r4-r7,lr}
-	mov r7, r10
-	mov r6, r9
-	mov r5, r8
-	push {r5-r7}
-	sub sp, 0xC
-	mov r8, r0
-	mov r10, r1
-	str r2, [sp]
-	ldr r5, [r0, 0x14]
-	ldrb r3, [r0, 0x1]
-	movs r0, 0
-	str r0, [sp, 0x4]
-	mov r9, r0
-	cmp r5, 0
-	beq _0815D086
-_0815D00C:
-	lsls r0, r3, 3
-	adds r1, r0, 0
-	adds r1, 0x39
-	ldr r2, _0815D0D0 @ =gMain
-	adds r7, r1, r2
-	adds r0, 0x3C
-	adds r6, r0, r2
-_0815D01A:
-	mov r0, r10
-	adds r1, r5, 0
-	str r3, [sp, 0x8]
-	bl __udivsi3
-	adds r4, r0, 0
-	adds r0, r4, 0
-	muls r0, r5
-	mov r1, r10
-	subs r1, r0
-	mov r10, r1
-	adds r0, r5, 0
-	movs r1, 0xA
-	bl __udivsi3
-	adds r5, r0, 0
-	ldr r3, [sp, 0x8]
-	cmp r4, 0
-	bne _0815D04A
-	ldr r2, [sp, 0x4]
-	cmp r2, 0
-	bne _0815D04A
-	cmp r5, 0
-	bne _0815D00C
-_0815D04A:
-	movs r0, 0x1
-	str r0, [sp, 0x4]
-	mov r1, r8
-	ldrb r0, [r1, 0x9]
-	adds r2, r4, 0
-	muls r2, r0
-	ldrh r4, [r1, 0xA]
-	adds r2, r4
-	ldr r1, _0815D0D4 @ =0x000003ff
-	adds r0, r1, 0
-	ands r2, r0
-	ldrh r0, [r6]
-	ldr r4, _0815D0D8 @ =0xfffffc00
-	adds r1, r4, 0
-	ands r0, r1
-	orrs r0, r2
-	strh r0, [r6]
-	ldrb r0, [r7]
-	movs r2, 0x4
-	negs r2, r2
-	adds r1, r2, 0
-	ands r0, r1
-	strb r0, [r7]
-	adds r7, 0x8
-	adds r6, 0x8
-	adds r3, 0x1
-	movs r4, 0x1
-	add r9, r4
-	cmp r5, 0
-	bne _0815D01A
-_0815D086:
-	mov r0, r8
-	ldrb r0, [r0, 0x3]
-	cmp r9, r0
-	bge _0815D0B6
-	ldr r1, _0815D0D0 @ =gMain
-	movs r5, 0x4
-	negs r5, r5
-	movs r4, 0x2
-	lsls r0, r3, 3
-	adds r0, 0x39
-	adds r2, r0, r1
-_0815D09C:
-	ldrb r1, [r2]
-	adds r0, r5, 0
-	ands r0, r1
-	orrs r0, r4
-	strb r0, [r2]
-	adds r2, 0x8
-	adds r3, 0x1
-	movs r1, 0x1
-	add r9, r1
-	mov r0, r8
-	ldrb r0, [r0, 0x3]
-	cmp r9, r0
-	blt _0815D09C
-_0815D0B6:
-	ldr r1, [sp]
-	cmp r1, 0
-	beq _0815D0DC
-	lsls r0, r3, 3
-	ldr r2, _0815D0D0 @ =gMain
-	adds r0, r2
-	adds r0, 0x39
-	ldrb r2, [r0]
-	movs r1, 0x4
-	negs r1, r1
-	ands r1, r2
-	strb r1, [r0]
-	b _0815D0F2
-	.align 2, 0
-_0815D0D0: .4byte gMain
-_0815D0D4: .4byte 0x000003ff
-_0815D0D8: .4byte 0xfffffc00
-_0815D0DC:
-	lsls r2, r3, 3
-	ldr r4, _0815D104 @ =gMain
-	adds r2, r4
-	adds r2, 0x39
-	ldrb r1, [r2]
-	movs r0, 0x4
-	negs r0, r0
-	ands r0, r1
-	movs r1, 0x2
-	orrs r0, r1
-	strb r0, [r2]
-_0815D0F2:
-	add sp, 0xC
-	pop {r3-r5}
-	mov r8, r3
-	mov r9, r4
-	mov r10, r5
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0815D104: .4byte gMain
-	thumb_func_end sub_815CFEC
-
-	thumb_func_start sub_815D108
-sub_815D108: @ 815D108
-	push {r4-r7,lr}
-	adds r4, r0, 0
-	ldr r0, _0815D1A0 @ =gUnknown_203F454
-	ldr r0, [r0]
-	cmp r0, 0
-	beq _0815D19A
-	ldr r2, [r0, 0x4]
-	lsls r1, r4, 3
-	subs r0, r1, r4
-	lsls r0, 2
-	adds r2, r0, r2
-	ldrb r0, [r2]
-	adds r5, r1, 0
-	cmp r0, 0
-	beq _0815D19A
-	ldrb r3, [r2, 0x3]
-	adds r0, r3, 0x1
-	ldrb r2, [r2, 0x1]
-	cmp r0, 0
-	beq _0815D152
-	ldr r1, _0815D1A4 @ =gMain
-	movs r7, 0x4
-	negs r7, r7
-	movs r6, 0x2
-	adds r3, r0, 0
-	lsls r0, r2, 3
-	adds r0, 0x39
-	adds r2, r0, r1
-_0815D140:
-	ldrb r1, [r2]
-	adds r0, r7, 0
-	ands r0, r1
-	orrs r0, r6
-	strb r0, [r2]
-	subs r3, 0x1
-	adds r2, 0x8
-	cmp r3, 0
-	bne _0815D140
-_0815D152:
-	adds r0, r4, 0
-	bl sub_815D29C
-	cmp r0, 0
-	bne _0815D16E
-	ldr r0, _0815D1A0 @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r1, [r0, 0x4]
-	subs r0, r5, r4
-	lsls r0, 2
-	adds r0, r1
-	ldrh r0, [r0, 0x10]
-	bl FreeSpriteTilesByTag
-_0815D16E:
-	adds r0, r4, 0
-	bl sub_815D2E0
-	cmp r0, 0
-	bne _0815D18A
-	ldr r0, _0815D1A0 @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r1, [r0, 0x4]
-	subs r0, r5, r4
-	lsls r0, 2
-	adds r0, r1
-	ldrh r0, [r0, 0x12]
-	bl FreeSpritePaletteByTag
-_0815D18A:
-	ldr r0, _0815D1A0 @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r1, [r0, 0x4]
-	subs r0, r5, r4
-	lsls r0, 2
-	adds r0, r1
-	movs r1, 0
-	strb r1, [r0]
-_0815D19A:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0815D1A0: .4byte gUnknown_203F454
-_0815D1A4: .4byte gMain
-	thumb_func_end sub_815D108
-
-	thumb_func_start sub_815D1A8
-sub_815D1A8: @ 815D1A8
-	push {r4-r7,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldr r0, _0815D1FC @ =gUnknown_203F454
-	ldr r1, [r0]
-	adds r7, r0, 0
-	cmp r1, 0
-	beq _0815D238
-	ldr r2, [r1, 0x4]
-	lsls r1, r4, 3
-	subs r0, r1, r4
-	lsls r0, 2
-	adds r2, r0, r2
-	ldrb r0, [r2]
-	adds r6, r1, 0
-	cmp r0, 0
-	beq _0815D238
-	ldrb r3, [r2, 0x3]
-	adds r1, r3, 0x1
-	ldrb r0, [r2, 0x1]
-	cmp r5, 0
-	beq _0815D204
-	cmp r1, 0
-	beq _0815D238
-	ldr r1, _0815D200 @ =gMain
-	movs r5, 0x4
-	negs r5, r5
-	movs r4, 0x2
-	adds r3, 0x1
-	lsls r0, 3
-	adds r0, 0x39
-	adds r2, r0, r1
-_0815D1E8:
-	ldrb r1, [r2]
-	adds r0, r5, 0
-	ands r0, r1
-	orrs r0, r4
-	strb r0, [r2]
-	subs r3, 0x1
-	adds r2, 0x8
-	cmp r3, 0
-	bne _0815D1E8
-	b _0815D238
-	.align 2, 0
-_0815D1FC: .4byte gUnknown_203F454
-_0815D200: .4byte gMain
-_0815D204:
-	cmp r1, 0
-	beq _0815D226
-	ldr r1, _0815D240 @ =gMain
-	movs r5, 0x4
-	negs r5, r5
-	adds r3, 0x1
-	lsls r0, 3
-	adds r0, 0x39
-	adds r2, r0, r1
-_0815D216:
-	ldrb r1, [r2]
-	adds r0, r5, 0
-	ands r0, r1
-	strb r0, [r2]
-	subs r3, 0x1
-	adds r2, 0x8
-	cmp r3, 0
-	bne _0815D216
-_0815D226:
-	ldr r0, [r7]
-	ldr r1, [r0, 0x4]
-	subs r0, r6, r4
-	lsls r0, 2
-	adds r0, r1
-	ldr r1, [r0, 0x18]
-	adds r0, r4, 0
-	bl sub_815CD70
-_0815D238:
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0815D240: .4byte gMain
-	thumb_func_end sub_815D1A8
-
-	thumb_func_start sub_815D244
-sub_815D244: @ 815D244
-	push {r4,r5,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	movs r5, 0x40
-	movs r3, 0
-	ldr r0, _0815D270 @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r2, [r0]
-	cmp r3, r2
-	bcs _0815D286
-	ldr r1, [r0, 0x4]
-_0815D25A:
-	ldrb r0, [r1]
-	cmp r0, 0
-	bne _0815D274
-	ldrb r0, [r1, 0x1]
-	cmp r0, 0xFF
-	beq _0815D27E
-	ldrb r0, [r1, 0x3]
-	cmp r0, r4
-	bhi _0815D27E
-	ldrb r0, [r1, 0x1]
-	b _0815D296
-	.align 2, 0
-_0815D270: .4byte gUnknown_203F454
-_0815D274:
-	adds r0, r5, 0x1
-	ldrb r5, [r1, 0x3]
-	adds r0, r5
-	lsls r0, 16
-	lsrs r5, r0, 16
-_0815D27E:
-	adds r1, 0x1C
-	adds r3, 0x1
-	cmp r3, r2
-	bcc _0815D25A
-_0815D286:
-	adds r0, r5, r4
-	adds r0, 0x1
-	cmp r0, 0x80
-	bgt _0815D294
-	lsls r0, r5, 24
-	lsrs r0, 24
-	b _0815D296
-_0815D294:
-	movs r0, 0xFF
-_0815D296:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_815D244
-
-	thumb_func_start sub_815D29C
-sub_815D29C: @ 815D29C
-	push {r4-r6,lr}
-	adds r3, r0, 0
-	movs r2, 0
-	ldr r0, _0815D2CC @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r4, [r0]
-	cmp r2, r4
-	bcs _0815D2D8
-	ldr r1, [r0, 0x4]
-	lsls r0, r3, 3
-	subs r0, r3
-	lsls r0, 2
-	adds r5, r0, r1
-_0815D2B6:
-	ldrb r0, [r1]
-	cmp r0, 0
-	beq _0815D2D0
-	cmp r2, r3
-	beq _0815D2D0
-	ldrh r0, [r1, 0x10]
-	ldrh r6, [r5, 0x10]
-	cmp r0, r6
-	bne _0815D2D0
-	movs r0, 0x1
-	b _0815D2DA
-	.align 2, 0
-_0815D2CC: .4byte gUnknown_203F454
-_0815D2D0:
-	adds r1, 0x1C
-	adds r2, 0x1
-	cmp r2, r4
-	bcc _0815D2B6
-_0815D2D8:
-	movs r0, 0
-_0815D2DA:
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_815D29C
-
-	thumb_func_start sub_815D2E0
-sub_815D2E0: @ 815D2E0
-	push {r4-r6,lr}
-	adds r3, r0, 0
-	movs r2, 0
-	ldr r0, _0815D310 @ =gUnknown_203F454
-	ldr r0, [r0]
-	ldr r4, [r0]
-	cmp r2, r4
-	bcs _0815D31C
-	ldr r1, [r0, 0x4]
-	lsls r0, r3, 3
-	subs r0, r3
-	lsls r0, 2
-	adds r5, r0, r1
-_0815D2FA:
-	ldrb r0, [r1]
-	cmp r0, 0
-	beq _0815D314
-	cmp r2, r3
-	beq _0815D314
-	ldrh r0, [r1, 0x12]
-	ldrh r6, [r5, 0x12]
-	cmp r0, r6
-	bne _0815D314
-	movs r0, 0x1
-	b _0815D31E
-	.align 2, 0
-_0815D310: .4byte gUnknown_203F454
-_0815D314:
-	adds r1, 0x1C
-	adds r2, 0x1
-	cmp r2, r4
-	bcc _0815D2FA
-_0815D31C:
-	movs r0, 0
-_0815D31E:
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_815D2E0
-
-	thumb_func_start sub_815D324
-sub_815D324: @ 815D324
-	ldr r2, _0815D330 @ =gUnknown_8479658
-	lsls r0, 2
-	adds r1, r0
-	adds r1, r2
-	ldrb r0, [r1]
-	bx lr
-	.align 2, 0
-_0815D330: .4byte gUnknown_8479658
-	thumb_func_end sub_815D324
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/data/data_8471F00.s b/data/data_8471F00.s
index 9c616b37c..e8b51cf69 100644
--- a/data/data_8471F00.s
+++ b/data/data_8471F00.s
@@ -256,8 +256,11 @@ gUnknown_84795B8:: @ 84795B8
 gUnknown_84795C8:: @ 84795C8
 	.incbin "baserom.gba", 0x4795C8, 0x90
 
-gUnknown_8479658:: @ 8479658
-	.incbin "baserom.gba", 0x479658, 0x600
+	.section .rodata.8479668
+
+	.align 2
+gUnknown_8479668:: @ 8479668
+	.incbin "baserom.gba", 0x479668, 0x5F0
 
 gUnknown_8479C58:: @ 8479C58
 	.incbin "baserom.gba", 0x479C58, 0x30
diff --git a/include/decompress.h b/include/decompress.h
index 9a2093b9f..19b507525 100644
--- a/include/decompress.h
+++ b/include/decompress.h
@@ -36,5 +36,6 @@ void LoadSpecialPokePic_DontHandleDeoxys(const struct CompressedSpriteSheet *src
 u32 sub_8034974(const u8 *ptr);
 
 void sub_800F034(const struct CompressedSpriteSheet *src);
+u32 GetDecompressedDataSize(const u8 *ptr);
 
 #endif // GUARD_DECOMPRESS_H
diff --git a/include/unk_815C980.h b/include/unk_815C980.h
new file mode 100644
index 000000000..78d4bd73b
--- /dev/null
+++ b/include/unk_815C980.h
@@ -0,0 +1,24 @@
+#ifndef GUARD_UNK_815C980_H
+#define GUARD_UNK_815C980_H
+
+struct UnkStruct3
+{
+    u8 field_0_0:2;
+    u8 shape:2;
+    u8 size:2;
+    u8 priority:2;
+    u8 field_1;
+    u8 xDelta;
+    s16 x;
+    s16 y;
+    const struct SpriteSheet *spriteSheet;
+    const struct SpritePalette *spritePal;
+};
+
+void sub_815C9F4(void);
+void sub_815D108(u32 id);
+void sub_815CD70(u32 id, s32 arg1);
+u8 sub_815D324(u32 shape, u32 size);
+bool32 sub_815CA40(u32 id, s32 arg1, const struct UnkStruct3 *arg2);
+
+#endif //GUARD_UNK_815C980_H
diff --git a/ld_script.txt b/ld_script.txt
index ff20df156..1974057d7 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -261,8 +261,8 @@ SECTIONS {
         src/dodrio_berry_picking_2.o(.text);
         asm/dodrio_berry_picking_2.o(.text);
         asm/teachy_tv.o(.text);
-        asm/unk_815C27C.o(.text);
-        asm/unk_815C980.o(.text);
+        asm/ereader_helpers.o(.text);
+        src/unk_815C980.o(.text);
         asm/ss_anne.o(.text);
         asm/cereader_tool.o(.text);
         src/trainer_tower.o(.text);
@@ -427,6 +427,8 @@ SECTIONS {
         data/data_8468C98.o(.rodata);
         src/quest_log_8150454.o(.rodata);
         data/data_8471F00.o(.rodata);
+        src/unk_815C980.o(.rodata);
+        data/data_8471F00.o(.rodata.8479668);
         src/trainer_tower.o(.rodata);
         data/data_8471F00.o(.rodata.after_trainer_tower);
         src/mystery_event_msg.o(.rodata);
diff --git a/src/unk_815C980.c b/src/unk_815C980.c
new file mode 100644
index 000000000..9d0dd3341
--- /dev/null
+++ b/src/unk_815C980.c
@@ -0,0 +1,436 @@
+#include "global.h"
+#include "malloc.h"
+#include "decompress.h"
+#include "unk_815C980.h"
+#include "main.h"
+#include "battle.h"
+
+struct UnkStruct2
+{
+    bool8 isActive;
+    u8 firstOamId;
+    u8 field_2;
+    u8 oamCount;
+    u8 palTagIndex;
+    u8 size;
+    u8 shape;
+    u8 priority;
+    u8 xDelta;
+    u8 field_9;
+    u16 tileStart;
+    s16 x;
+    s16 y;
+    u16 tileTag;
+    u16 palTag;
+    u32 field_14;
+    s32 field_18;
+};
+
+struct UnkStruct1
+{
+    u32 count;
+    struct UnkStruct2 *array;
+};
+
+// this file's functions
+static u8 sub_815D244(u8 arg0);;
+static void sub_815CC28(struct UnkStruct2 *arg0);
+static void sub_815CDDC(struct UnkStruct2 *arg0, s32 arg1, bool32 arg2);
+static void sub_815CE90(struct UnkStruct2 *arg0, s32 arg1, bool32 arg2);
+static void sub_815CFEC(struct UnkStruct2 *arg0, s32 arg1, bool32 arg2);
+static bool32 SharesTileWithAnyActive(u32 id);
+static bool32 SharesPalWithAnyActive(u32 id);
+static void sub_8035648(void);
+
+// ewram
+static EWRAM_DATA struct UnkStruct1 *gUnknown_203F454 = {0};
+
+// const rom data
+static const u8 gUnknown_8479658[][4] =
+{
+    {0x01, 0x04, 0x10, 0x40},
+    {0x02, 0x04, 0x08, 0x20},
+    {0x02, 0x04, 0x08, 0x20},
+    {0x00, 0x00, 0x00, 0x00}
+};
+
+// code
+bool32 sub_815C980(u32 count)
+{
+    u32 i;
+
+    if (gUnknown_203F454 != NULL)
+        sub_815C9F4();
+
+    gUnknown_203F454 = Alloc(sizeof(*gUnknown_203F454));
+    if (gUnknown_203F454 == NULL)
+        return FALSE;
+
+    gUnknown_203F454->array = Alloc(sizeof(struct UnkStruct2) * count);
+    if (gUnknown_203F454->array == NULL)
+    {
+        Free(gUnknown_203F454);
+        return FALSE;
+    }
+
+    gUnknown_203F454->count = count;
+    for (i = 0; i < count; i++)
+    {
+        gUnknown_203F454->array[i].isActive = FALSE;
+        gUnknown_203F454->array[i].firstOamId = 0xFF;
+    }
+
+    return TRUE;
+}
+
+void sub_815C9F4(void)
+{
+    if (gUnknown_203F454 != NULL)
+    {
+        if (gUnknown_203F454->array != NULL)
+        {
+            u32 i;
+
+            for (i = 0; i < gUnknown_203F454->count; i++)
+                sub_815D108(i);
+
+            Free(gUnknown_203F454->array);
+        }
+
+        FREE_AND_SET_NULL(gUnknown_203F454);
+    }
+}
+
+bool32 sub_815CA40(u32 id, s32 arg1, const struct UnkStruct3 *arg2)
+{
+    u32 i;
+
+    if (gUnknown_203F454 == NULL)
+        return FALSE;
+    if (gUnknown_203F454->array[id].isActive)
+        return FALSE;
+
+    gUnknown_203F454->array[id].firstOamId = sub_815D244(arg2->field_1);
+    if (gUnknown_203F454->array[id].firstOamId == 0xFF)
+        return FALSE;
+
+    gUnknown_203F454->array[id].tileStart = GetSpriteTileStartByTag(arg2->spriteSheet->tag);
+    if (gUnknown_203F454->array[id].tileStart == 0xFFFF)
+    {
+        if (arg2->spriteSheet->size != 0)
+        {
+            gUnknown_203F454->array[id].tileStart = LoadSpriteSheet(arg2->spriteSheet);
+        }
+        else
+        {
+            struct CompressedSpriteSheet compObjectPic;
+
+            compObjectPic = *(struct CompressedSpriteSheet*)(arg2->spriteSheet);
+            compObjectPic.size = GetDecompressedDataSize(arg2->spriteSheet->data);
+            gUnknown_203F454->array[id].tileStart = LoadCompressedObjectPic(&compObjectPic);
+        }
+
+        if (gUnknown_203F454->array[id].tileStart == 0xFFFF)
+            return FALSE;
+    }
+
+    gUnknown_203F454->array[id].palTagIndex = IndexOfSpritePaletteTag(arg2->spritePal->tag);
+    if (gUnknown_203F454->array[id].palTagIndex == 0xFF)
+        gUnknown_203F454->array[id].palTagIndex = LoadSpritePalette(arg2->spritePal);
+
+    gUnknown_203F454->array[id].field_2 = arg2->field_0_0;
+    gUnknown_203F454->array[id].oamCount = arg2->field_1;
+    gUnknown_203F454->array[id].x = arg2->x;
+    gUnknown_203F454->array[id].y = arg2->y;
+    gUnknown_203F454->array[id].shape = arg2->shape;
+    gUnknown_203F454->array[id].size = arg2->size;
+    gUnknown_203F454->array[id].priority = arg2->priority;
+    gUnknown_203F454->array[id].xDelta = arg2->xDelta;
+    gUnknown_203F454->array[id].field_9 = sub_815D324(arg2->shape, arg2->size);
+    gUnknown_203F454->array[id].tileTag = arg2->spriteSheet->tag;
+    gUnknown_203F454->array[id].palTag = arg2->spritePal->tag;
+    gUnknown_203F454->array[id].isActive = TRUE;
+    gUnknown_203F454->array[id].field_14 = 1;
+
+    for (i = 1; i < arg2->field_1; i++)
+        gUnknown_203F454->array[id].field_14 *= 10;
+
+    sub_815CC28(&gUnknown_203F454->array[id]);
+    sub_815CD70(id, arg1);
+
+    return TRUE;
+}
+
+static void sub_815CC28(struct UnkStruct2 *arg0)
+{
+    u32 i;
+    u32 oamId = arg0->firstOamId;
+    u32 x = arg0->x;
+    u32 oamCount = arg0->oamCount + 1;
+
+    CpuFill16(0, &gMain.oamBuffer[oamId], sizeof(struct OamData) * oamCount);
+    for (i = 0, oamId = arg0->firstOamId; i < oamCount; i++, oamId++)
+    {
+        gMain.oamBuffer[oamId].y = arg0->y;
+        gMain.oamBuffer[oamId].x = x;
+        gMain.oamBuffer[oamId].shape = arg0->shape;
+        gMain.oamBuffer[oamId].size = arg0->size;
+        gMain.oamBuffer[oamId].tileNum = arg0->tileStart;
+        gMain.oamBuffer[oamId].priority = arg0->priority;
+        gMain.oamBuffer[oamId].paletteNum = arg0->palTagIndex;
+
+        x += arg0->xDelta;
+    }
+
+    oamId--;
+    gMain.oamBuffer[oamId].x = arg0->x - arg0->xDelta;
+    gMain.oamBuffer[oamId].affineMode = 2;
+    gMain.oamBuffer[oamId].tileNum = arg0->tileStart + (arg0->field_9 * 10);
+}
+
+void sub_815CD70(u32 id, s32 arg1)
+{
+    bool32 r2;
+
+    if (gUnknown_203F454 == NULL)
+        return;
+    if (!gUnknown_203F454->array[id].isActive)
+        return;
+
+    gUnknown_203F454->array[id].field_18 = arg1;
+    if (arg1 < 0)
+    {
+        r2 = TRUE;
+        arg1 *= -1;
+    }
+    else
+    {
+        r2 = FALSE;
+    }
+
+    switch (gUnknown_203F454->array[id].field_2)
+    {
+    case 0:
+    default:
+        sub_815CDDC(&gUnknown_203F454->array[id], arg1, r2);
+        break;
+    case 1:
+        sub_815CE90(&gUnknown_203F454->array[id], arg1, r2);
+        break;
+    case 2:
+        sub_815CFEC(&gUnknown_203F454->array[id], arg1, r2);
+        break;
+    }
+}
+
+static void sub_815CDDC(struct UnkStruct2 *arg0, s32 arg1, bool32 arg2)
+{
+    u32 r5 = arg0->field_14;
+    u32 oamId = arg0->firstOamId;
+
+    while (r5 != 0)
+    {
+        u32 r4 = arg1 / r5;
+        arg1 -= (r4 * r5);
+        r5 /= 10;
+
+        gMain.oamBuffer[oamId].tileNum = (r4 * arg0->field_9) + arg0->tileStart;
+        oamId++;
+    }
+
+    if (arg2)
+        gMain.oamBuffer[oamId].affineMode = 0;
+    else
+        gMain.oamBuffer[oamId].affineMode = 2;
+}
+
+static void sub_815CE90(struct UnkStruct2 *arg0, s32 arg1, bool32 arg2)
+{
+    u32 r5 = arg0->field_14;
+    static int gUnknown_3002078;
+    static int gUnknown_300207C;
+    static int gUnknown_3002080;
+
+    gUnknown_3002078 = arg0->firstOamId;
+    gUnknown_300207C = 0;
+    gUnknown_3002080 = -1;
+
+    while (r5 != 0)
+    {
+        u32 r4 = arg1 / r5;
+        arg1 -= (r4 * r5);
+        r5 /= 10;
+
+        if (r4 != 0 || gUnknown_3002080 != -1 || r5 == 0)
+        {
+            gMain.oamBuffer[gUnknown_3002078].tileNum = (r4 * arg0->field_9) + arg0->tileStart;
+            gMain.oamBuffer[gUnknown_3002078].affineMode = 0;
+
+            if (gUnknown_3002080 == -1)
+                gUnknown_3002080 = gUnknown_300207C;
+        }
+        else
+        {
+            gMain.oamBuffer[gUnknown_3002078].affineMode = 2;
+        }
+
+        gUnknown_3002078++;
+        gUnknown_300207C++;
+    }
+
+    if (arg2)
+    {
+        gMain.oamBuffer[gUnknown_3002078].affineMode = 0;
+        gMain.oamBuffer[gUnknown_3002078].x = arg0->x + ((gUnknown_3002080 - 1) * arg0->xDelta);
+    }
+    else
+    {
+        gMain.oamBuffer[gUnknown_3002078].affineMode = 2;
+    }
+}
+
+static void sub_815CFEC(struct UnkStruct2 *arg0, s32 arg1, bool32 arg2)
+{
+    u32 r5 = arg0->field_14;
+    u32 oamId = arg0->firstOamId;
+    u32 var_28 = 0;
+    s32 r9 = 0;
+
+    while (r5 != 0)
+    {
+        u32 r4 = arg1 / r5;
+        arg1 -= (r4 * r5);
+        r5 /= 10;
+
+        if (r4 != 0 || var_28 != 0 || r5 == 0)
+        {
+            var_28 = 1;
+            gMain.oamBuffer[oamId].tileNum = (r4 * arg0->field_9) + arg0->tileStart;
+            gMain.oamBuffer[oamId].affineMode = 0;
+
+            oamId++;
+            r9++;
+        }
+    }
+
+    while (r9 < arg0->oamCount)
+    {
+        gMain.oamBuffer[oamId].affineMode = 2;
+        oamId++;
+        r9++;
+    }
+
+    if (arg2)
+        gMain.oamBuffer[oamId].affineMode = 0;
+    else
+        gMain.oamBuffer[oamId].affineMode = 2;
+}
+
+void sub_815D108(u32 id)
+{
+    s32 oamId, oamCount, i;
+
+    if (gUnknown_203F454 == NULL)
+        return;
+    if (!gUnknown_203F454->array[id].isActive)
+        return;
+
+    oamCount = gUnknown_203F454->array[id].oamCount + 1;
+    oamId = gUnknown_203F454->array[id].firstOamId;
+
+    for (i = 0; i < oamCount; i++, oamId++)
+        gMain.oamBuffer[oamId].affineMode = 2;
+
+    if (!SharesTileWithAnyActive(id))
+        FreeSpriteTilesByTag(gUnknown_203F454->array[id].tileTag);
+    if (!SharesPalWithAnyActive(id))
+        FreeSpritePaletteByTag(gUnknown_203F454->array[id].palTag);
+
+    gUnknown_203F454->array[id].isActive = FALSE;
+}
+
+void sub_815D1A8(u32 id, bool32 arg1)
+{
+    s32 oamId, oamCount, i;
+
+    if (gUnknown_203F454 == NULL)
+        return;
+    if (!gUnknown_203F454->array[id].isActive)
+        return;
+
+    oamCount = gUnknown_203F454->array[id].oamCount + 1;
+    oamId = gUnknown_203F454->array[id].firstOamId;
+    if (arg1)
+    {
+        for (i = 0; i < oamCount; i++, oamId++)
+            gMain.oamBuffer[oamId].affineMode = 2;
+    }
+    else
+    {
+        for (i = 0; i < oamCount; i++, oamId++)
+            gMain.oamBuffer[oamId].affineMode = 0;
+
+        sub_815CD70(id, gUnknown_203F454->array[id].field_18);
+    }
+}
+
+static u8 sub_815D244(u8 arg0)
+{
+    u32 i;
+    u16 oamCount = 64;
+
+    for (i = 0; i < gUnknown_203F454->count; i++)
+    {
+        if (!gUnknown_203F454->array[i].isActive)
+        {
+            if (gUnknown_203F454->array[i].firstOamId != 0xFF && gUnknown_203F454->array[i].oamCount <= arg0)
+                return gUnknown_203F454->array[i].firstOamId;
+        }
+        else
+        {
+            oamCount += 1 + gUnknown_203F454->array[i].oamCount;
+        }
+    }
+
+    if (oamCount + arg0 + 1 > 128)
+        return 0xFF;
+    else
+        return oamCount;
+}
+
+static bool32 SharesTileWithAnyActive(u32 id)
+{
+    u32 i;
+
+    for (i = 0; i < gUnknown_203F454->count; i++)
+    {
+        if (gUnknown_203F454->array[i].isActive && i != id
+            && gUnknown_203F454->array[i].tileTag == gUnknown_203F454->array[id].tileTag)
+        {
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+static bool32 SharesPalWithAnyActive(u32 id)
+{
+    u32 i;
+
+    for (i = 0; i < gUnknown_203F454->count; i++)
+    {
+        if (gUnknown_203F454->array[i].isActive && i != id
+            && gUnknown_203F454->array[i].palTag == gUnknown_203F454->array[id].palTag)
+        {
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+u8 sub_815D324(u32 shape, u32 size)
+{
+    return gUnknown_8479658[shape][size];
+}
diff --git a/sym_bss.txt b/sym_bss.txt
index 88c464566..556a53add 100644
--- a/sym_bss.txt
+++ b/sym_bss.txt
@@ -230,15 +230,10 @@ gUnknown_3002072: @ 3002072
 gUnknown_3002074: @ 3002074
 	.space 0x4
 
-gUnknown_3002078: @ 3002078
-	.space 0x4
-
-gUnknown_300207C: @ 300207C
-	.space 0x4
-
-gUnknown_3002080: @ 3002080
-	.space 0x8
+	.align 3
+	.include "src/unk_815C980.o"
 
+	.align 3
 	.include "asm/m4a_1.o"
 	.include "src/agb_flash.o"
 
diff --git a/sym_ewram.txt b/sym_ewram.txt
index 4a8ceab1b..a5151ebc0 100644
--- a/sym_ewram.txt
+++ b/sym_ewram.txt
@@ -1647,9 +1647,9 @@ gUnknown_203F44A: @ 203F44A
 gUnknown_203F450: @ 203F450
 	.space 0x4
 
-gUnknown_203F454: @ 203F454
-	.space 0x4
-
+	.align 2
+	.include "src/unk_815C980.o"
+	.align 2
 	.include "src/trainer_tower.o"
 
 gUnknown_203F460: @ 203F460