through sub_80C527C

5 files changed, 217 insertions, 630 deletions

diff --git a/asm/region_map.s b/asm/region_map.s
index 4f1b771f4..1f63bde6c 100644
--- a/asm/region_map.s
+++ b/asm/region_map.s
@@ -5,568 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_80C4E18
-sub_80C4E18: @ 80C4E18
-	push {r4,lr}
-	sub sp, 0xC
-	adds r4, r0, 0
-	ldr r0, _080C4E38 @ =gUnknown_20399D4
-	ldr r0, [r0]
-	ldr r1, _080C4E3C @ =0x00004799
-	adds r0, r1
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	bne _080C4E40
-	movs r0, 0x3
-	movs r1, 0
-	bl FillWindowPixelBuffer
-	b _080C4E48
-	.align 2, 0
-_080C4E38: .4byte gUnknown_20399D4
-_080C4E3C: .4byte 0x00004799
-_080C4E40:
-	movs r0, 0x3
-	movs r1, 0xFF
-	bl FillWindowPixelBuffer
-_080C4E48:
-	ldr r0, _080C4E70 @ =gUnknown_83F1CA8
-	str r0, [sp]
-	movs r0, 0
-	str r0, [sp, 0x4]
-	str r4, [sp, 0x8]
-	movs r0, 0x3
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0
-	bl AddTextPrinterParameterized3
-	movs r0, 0x3
-	movs r1, 0x2
-	bl CopyWindowToVram
-	add sp, 0xC
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080C4E70: .4byte gUnknown_83F1CA8
-	thumb_func_end sub_80C4E18
-
-	thumb_func_start sub_80C4E74
-sub_80C4E74: @ 80C4E74
-	push {r4,lr}
-	sub sp, 0xC
-	adds r4, r0, 0
-	ldr r0, _080C4E94 @ =gUnknown_20399D4
-	ldr r0, [r0]
-	ldr r1, _080C4E98 @ =0x00004799
-	adds r0, r1
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	bne _080C4E9C
-	movs r0, 0x4
-	movs r1, 0
-	bl FillWindowPixelBuffer
-	b _080C4EA4
-	.align 2, 0
-_080C4E94: .4byte gUnknown_20399D4
-_080C4E98: .4byte 0x00004799
-_080C4E9C:
-	movs r0, 0x4
-	movs r1, 0xFF
-	bl FillWindowPixelBuffer
-_080C4EA4:
-	ldr r0, _080C4ECC @ =gUnknown_83F1CA8
-	str r0, [sp]
-	movs r0, 0
-	str r0, [sp, 0x4]
-	str r4, [sp, 0x8]
-	movs r0, 0x4
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0
-	bl AddTextPrinterParameterized3
-	movs r0, 0x4
-	movs r1, 0x3
-	bl CopyWindowToVram
-	add sp, 0xC
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080C4ECC: .4byte gUnknown_83F1CA8
-	thumb_func_end sub_80C4E74
-
-	thumb_func_start sub_80C4ED0
-sub_80C4ED0: @ 80C4ED0
-	push {lr}
-	lsls r0, 24
-	cmp r0, 0
-	bne _080C4EE6
-	movs r0, 0x3
-	bl PutWindowTilemap
-	movs r0, 0x4
-	bl PutWindowTilemap
-	b _080C4EF2
-_080C4EE6:
-	movs r0, 0x3
-	bl ClearWindowTilemap
-	movs r0, 0x4
-	bl ClearWindowTilemap
-_080C4EF2:
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80C4ED0
-
-	thumb_func_start MCB2_FlyMap
-MCB2_FlyMap: @ 80C4EF8
-	push {lr}
-	bl sub_80C51E8
-	movs r0, 0x2
-	bl sub_80BFEDC
-	pop {r0}
-	bx r0
-	thumb_func_end MCB2_FlyMap
-
-	thumb_func_start sub_80C4F08
-sub_80C4F08: @ 80C4F08
-	push {r4,r5,lr}
-	sub sp, 0x4
-	lsls r0, 24
-	lsrs r5, r0, 24
-	ldr r0, _080C4F28 @ =gUnknown_20399FC
-	ldr r2, [r0]
-	ldrb r0, [r2]
-	cmp r0, 0x6
-	bls _080C4F1C
-	b _080C51B8
-_080C4F1C:
-	lsls r0, 2
-	ldr r1, _080C4F2C @ =_080C4F30
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_080C4F28: .4byte gUnknown_20399FC
-_080C4F2C: .4byte _080C4F30
-	.align 2, 0
-_080C4F30:
-	.4byte _080C4F4C
-	.4byte _080C4F92
-	.4byte _080C4FEC
-	.4byte _080C5000
-	.4byte _080C5028
-	.4byte _080C5180
-	.4byte _080C5196
-_080C4F4C:
-	movs r0, 0x1
-	negs r0, r0
-	movs r1, 0
-	str r1, [sp]
-	movs r2, 0x10
-	movs r3, 0
-	bl BeginNormalPaletteFade
-	bl sub_80C0E20
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	bl sub_80C07E4
-	adds r2, r0, 0
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl sub_80C4398
-	movs r0, 0
-	movs r1, 0
-	bl sub_80C3008
-	movs r0, 0x1
-	movs r1, 0x1
-	bl sub_80C41D8
-	movs r0, 0
-	bl sub_80C3154
-	movs r0, 0
-	bl sub_80C4324
-	b _080C51A6
-_080C4F92:
-	movs r0, 0x2
-	bl sub_80C0E04
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080C4FAE
-	bl sub_80C07E4
-	adds r1, r0, 0
-	adds r0, r5, 0
-	bl sub_80C2208
-	b _080C51A6
-_080C4FAE:
-	movs r0, 0
-	bl ShowBg
-	movs r0, 0x3
-	bl ShowBg
-	movs r0, 0x1
-	bl ShowBg
-	ldr r0, _080C4FE8 @ =gUnknown_8418EB5
-	bl sub_80C4E18
-	bl sub_80C0E20
-	lsls r0, 24
-	lsrs r0, 24
-	movs r1, 0x19
-	movs r2, 0
-	bl sub_80C48BC
-	bl sub_80C0E20
-	lsls r0, 24
-	lsrs r0, 24
-	movs r1, 0x19
-	movs r2, 0
-	bl sub_80C4960
-	b _080C51A6
-	.align 2, 0
-_080C4FE8: .4byte gUnknown_8418EB5
-_080C4FEC:
-	ldr r0, _080C4FFC @ =gUnknown_8418EB0
-	bl sub_80C4E74
-	movs r0, 0
-	bl sub_80C4ED0
-	b _080C51A6
-	.align 2, 0
-_080C4FFC: .4byte gUnknown_8418EB0
-_080C5000:
-	ldr r0, _080C5024 @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	beq _080C500E
-	b _080C51DC
-_080C500E:
-	bl sub_80C0B18
-	movs r0, 0
-	bl PutWindowTilemap
-	bl sub_80C0BB0
-	movs r0, 0x1
-	bl PutWindowTilemap
-	b _080C51A6
-	.align 2, 0
-_080C5024: .4byte gPaletteFade
-_080C5028:
-	bl sub_80C3400
-	lsls r0, 24
-	lsrs r0, 24
-	subs r0, 0x1
-	cmp r0, 0x5
-	bls _080C5038
-	b _080C51DC
-_080C5038:
-	lsls r0, 2
-	ldr r1, _080C5044 @ =_080C5048
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_080C5044: .4byte _080C5048
-	.align 2, 0
-_080C5048:
-	.4byte _080C51DC
-	.4byte _080C51DC
-	.4byte _080C5070
-	.4byte _080C50F8
-	.4byte _080C5168
-	.4byte _080C5060
-_080C5060:
-	ldr r0, _080C506C @ =gUnknown_20399FC
-	ldr r1, [r0]
-	movs r0, 0x6
-	strb r0, [r1]
-	b _080C51DC
-	.align 2, 0
-_080C506C: .4byte gUnknown_20399FC
-_080C5070:
-	movs r0, 0
-	bl sub_80C3AC8
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x2
-	bne _080C5086
-	movs r0, 0x66
-	bl PlaySE
-	b _080C508A
-_080C5086:
-	bl sub_80C0450
-_080C508A:
-	bl sub_80C3178
-	bl sub_80C0B18
-	bl sub_80C0BB0
-	bl sub_80C0B9C
-	bl sub_80C3508
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x15
-	bne _080C50C4
-	bl sub_80C3514
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0xD
-	bne _080C50C4
-	movs r0, 0xE1
-	bl PlaySE
-	ldr r0, _080C50C0 @ =gUnknown_8418E95
-	bl sub_80C4E74
-	b _080C51DC
-	.align 2, 0
-_080C50C0: .4byte gUnknown_8418E95
-_080C50C4:
-	movs r0, 0
-	bl sub_80C3AC8
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x2
-	beq _080C50E0
-	movs r0, 0
-	bl sub_80C3AC8
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x4
-	bne _080C50EC
-_080C50E0:
-	ldr r0, _080C50E8 @ =gUnknown_8418EB0
-	bl sub_80C4E74
-	b _080C51DC
-	.align 2, 0
-_080C50E8: .4byte gUnknown_8418EB0
-_080C50EC:
-	ldr r0, _080C50F4 @ =gUnknown_8418E8B
-	bl sub_80C4E74
-	b _080C51DC
-	.align 2, 0
-_080C50F4: .4byte gUnknown_8418E8B
-_080C50F8:
-	movs r0, 0
-	bl sub_80C3AC8
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x2
-	beq _080C5114
-	movs r0, 0
-	bl sub_80C3AC8
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x4
-	bne _080C51DC
-_080C5114:
-	movs r0, 0x3
-	bl sub_80C0E04
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0x1
-	bne _080C51DC
-	ldr r0, _080C514C @ =gSaveBlock1Ptr
-	ldr r1, [r0]
-	movs r0, 0x4
-	ldrsb r0, [r1, r0]
-	ldrb r1, [r1, 0x5]
-	lsls r1, 24
-	asrs r1, 24
-	bl get_map_light_level_by_bank_and_number
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x4
-	beq _080C5140
-	cmp r0, 0x8
-	bne _080C5154
-_080C5140:
-	ldr r2, _080C5150 @ =gUnknown_20399FC
-	ldr r1, [r2]
-	movs r0, 0
-	strb r0, [r1, 0x2]
-	ldr r1, [r2]
-	b _080C51AA
-	.align 2, 0
-_080C514C: .4byte gSaveBlock1Ptr
-_080C5150: .4byte gUnknown_20399FC
-_080C5154:
-	movs r0, 0x1
-	bl PlaySE
-	ldr r1, _080C5164 @ =gUnknown_20399FC
-	ldr r0, [r1]
-	strb r4, [r0, 0x2]
-	ldr r1, [r1]
-	b _080C51AA
-	.align 2, 0
-_080C5164: .4byte gUnknown_20399FC
-_080C5168:
-	bl sub_80C0E20
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _080C517C @ =sub_80C07F8
-	adds r1, r5, 0
-	bl sub_80C0E70
-	b _080C51DC
-	.align 2, 0
-_080C517C: .4byte sub_80C07F8
-_080C5180:
-	movs r0, 0x2
-	bl sub_80C0E04
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080C51A6
-	adds r0, r5, 0
-	bl sub_80C2C1C
-	b _080C51A6
-_080C5196:
-	movs r0, 0x1
-	negs r0, r0
-	movs r1, 0
-	str r1, [sp]
-	movs r2, 0
-	movs r3, 0x10
-	bl BeginNormalPaletteFade
-_080C51A6:
-	ldr r0, _080C51B4 @ =gUnknown_20399FC
-	ldr r1, [r0]
-_080C51AA:
-	ldrb r0, [r1]
-	adds r0, 0x1
-	strb r0, [r1]
-	b _080C51DC
-	.align 2, 0
-_080C51B4: .4byte gUnknown_20399FC
-_080C51B8:
-	ldr r0, _080C51E4 @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	bne _080C51DC
-	ldrb r0, [r2, 0x2]
-	cmp r0, 0x1
-	bne _080C51D6
-	bl sub_80C3520
-	lsls r0, 16
-	lsrs r0, 16
-	bl sub_80C527C
-_080C51D6:
-	adds r0, r5, 0
-	bl sub_80C5208
-_080C51DC:
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080C51E4: .4byte gPaletteFade
-	thumb_func_end sub_80C4F08
-
-	thumb_func_start sub_80C51E8
-sub_80C51E8: @ 80C51E8
-	push {r4,lr}
-	ldr r4, _080C5204 @ =gUnknown_20399FC
-	movs r0, 0x4
-	bl AllocZeroed
-	str r0, [r4]
-	movs r1, 0
-	strb r1, [r0]
-	ldr r0, [r4]
-	strb r1, [r0, 0x1]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080C5204: .4byte gUnknown_20399FC
-	thumb_func_end sub_80C51E8
-
-	thumb_func_start sub_80C5208
-sub_80C5208: @ 80C5208
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	movs r0, 0x2
-	bl sub_80C0E04
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080C5220
-	bl sub_80C25BC
-_080C5220:
-	bl sub_80C4A04
-	bl sub_80C3188
-	bl sub_80C4348
-	bl sub_80C4D30
-	bl sub_80C0898
-	adds r0, r4, 0
-	bl DestroyTask
-	bl FreeAllWindowBuffers
-	ldr r0, _080C5250 @ =gUnknown_20399FC
-	ldr r0, [r0]
-	ldrb r0, [r0, 0x2]
-	cmp r0, 0x1
-	bne _080C5258
-	ldr r0, _080C5254 @ =CB2_ReturnToField
-	bl SetMainCallback2
-	b _080C525E
-	.align 2, 0
-_080C5250: .4byte gUnknown_20399FC
-_080C5254: .4byte CB2_ReturnToField
-_080C5258:
-	ldr r0, _080C5274 @ =CB2_ReturnToPartyMenuFromFlyMap
-	bl SetMainCallback2
-_080C525E:
-	ldr r4, _080C5278 @ =gUnknown_20399FC
-	ldr r0, [r4]
-	cmp r0, 0
-	beq _080C526E
-	bl Free
-	movs r0, 0
-	str r0, [r4]
-_080C526E:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080C5274: .4byte CB2_ReturnToPartyMenuFromFlyMap
-_080C5278: .4byte gUnknown_20399FC
-	thumb_func_end sub_80C5208
-
-	thumb_func_start sub_80C527C
-sub_80C527C: @ 80C527C
-	push {r4,r5,lr}
-	lsls r0, 16
-	ldr r1, _080C52A4 @ =0xffa80000
-	adds r0, r1
-	lsrs r0, 16
-	ldr r5, _080C52A8 @ =gUnknown_83F2EE0
-	lsls r1, r0, 1
-	adds r4, r1, r0
-	adds r0, r5, 0x2
-	adds r1, r4, r0
-	ldrb r0, [r1]
-	cmp r0, 0
-	beq _080C52AC
-	bl sub_805546C
-	adds r0, r4, r5
-	bl sub_8124C1C
-	b _080C52C6
-	.align 2, 0
-_080C52A4: .4byte 0xffa80000
-_080C52A8: .4byte gUnknown_83F2EE0
-_080C52AC:
-	adds r0, r4, r5
-	ldrb r0, [r0]
-	lsls r0, 24
-	asrs r0, 24
-	adds r1, r5, 0x1
-	adds r1, r4, r1
-	ldrb r1, [r1]
-	lsls r1, 24
-	asrs r1, 24
-	movs r2, 0x1
-	negs r2, r2
-	bl warp1_set_2
-_080C52C6:
-	bl sub_80842C8
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80C527C
-
 	thumb_func_start sub_80C52D0
 sub_80C52D0: @ 80C52D0
 	push {lr}
diff --git a/include/field_effect.h b/include/field_effect.h
index 4afc5cace..c2d14d43c 100644
--- a/include/field_effect.h
+++ b/include/field_effect.h
@@ -23,5 +23,6 @@ void sub_80853CC(u8 a0);
 void sub_8083598(u8 a0);
 void sub_8083A5C(struct Sprite * sprite, u8 spriteId);
 u8 sub_8083970(u16 species, s16 x, s16 y, bool8 unused);
+void sub_80842C8(void);
 
 #endif //GUARD_FIELD_EFFECTS_H
diff --git a/include/overworld.h b/include/overworld.h
index 04d28701c..324150779 100644
--- a/include/overworld.h
+++ b/include/overworld.h
@@ -149,5 +149,6 @@ void sub_8055778(int);
 void sub_8055738(u8 loc);
 
 void sub_8056078(void *, void *);
+void sub_805546C(u8 a0);
 
 #endif //GUARD_OVERWORLD_H
diff --git a/include/region_map.h b/include/region_map.h
index 76195a3af..bc5f789bd 100644
--- a/include/region_map.h
+++ b/include/region_map.h
@@ -24,76 +24,10 @@ enum {
     MAPSECTYPE_CITY_CANTFLY,
 };
 
-struct RegionMap {
-    /*0x000*/ u16 mapSecId;
-    /*0x002*/ u8 iconDrawType;
-    /*0x003*/ u8 posWithinMapSec;
-    /*0x004*/ u8 mapSecName[0x14];
-    /*0x018*/ u8 (*inputCallback)(void);
-    /*0x01c*/ struct Sprite *cursorSprite;
-    /*0x020*/ struct Sprite *playerIconSprite;
-    /*0x024*/ s32 bg2x;
-    /*0x028*/ s32 bg2y;
-    /*0x02c*/ u32 bg2pa;
-    /*0x034*/ u32 bg2pc;
-    /*0x030*/ u32 bg2pb;
-    /*0x038*/ u32 bg2pd;
-    /*0x03c*/ s32 unk_03c;
-    /*0x040*/ s32 unk_040;
-    /*0x044*/ s32 unk_044;
-    /*0x048*/ s32 unk_048;
-    /*0x04c*/ s32 unk_04c;
-    /*0x050*/ s32 unk_050;
-    /*0x054*/ u16 cursorPosX;
-    /*0x056*/ u16 cursorPosY;
-    /*0x058*/ u16 cursorTileTag;
-    /*0x05a*/ u16 cursorPaletteTag;
-    /*0x05c*/ s16 scrollX;
-    /*0x05e*/ s16 scrollY;
-    /*0x060*/ s16 unk_060;
-    /*0x062*/ s16 unk_062;
-    /*0x064*/ u16 zoomedCursorPosX;
-    /*0x066*/ u16 zoomedCursorPosY;
-    /*0x068*/ s16 zoomedCursorDeltaY;
-    /*0x06a*/ s16 zoomedCursorDeltaX;
-    /*0x06c*/ u16 zoomedCursorMovementFrameCounter;
-    /*0x06e*/ u16 unk_06e;
-    /*0x070*/ u16 playerIconTileTag;
-    /*0x072*/ u16 playerIconPaletteTag;
-    /*0x074*/ u16 playerIconSpritePosX;
-    /*0x076*/ u16 playerIconSpritePosY;
-    /*0x078*/ bool8 zoomed;
-    /*0x079*/ u8 initStep;
-    /*0x07a*/ s8 cursorMovementFrameCounter;
-    /*0x07b*/ s8 cursorDeltaX;
-    /*0x07c*/ s8 cursorDeltaY;
-    /*0x07d*/ bool8 needUpdateVideoRegs;
-    /*0x07e*/ bool8 blinkPlayerIcon;
-    /*0x07f*/ bool8 playerIsInCave;
-    /*0x080*/ u8 bgNum;
-    /*0x081*/ u8 charBaseIdx;
-    /*0x082*/ u8 mapBaseIdx;
-    /*0x083*/ bool8 bgManaged;
-    /*0x084*/ u8 filler_084[0x100];
-    /*0x184*/ u8 cursorSmallImage[0x100];
-    /*0x284*/ u8 cursorLargeImage[0x600];
-}; // size = 0x884
-
 // Exported RAM declarations
 
 // Exported ROM declarations
-void sub_8122CF8(struct RegionMap *regionMap, struct BgTemplate *template, bool8 zoomed);
-bool8 sub_8122DB0(void);
-void UpdateRegionMapVideoRegs(void);
-void InitRegionMap(struct RegionMap *regionMap, u8 argument);
-u8 sub_81230AC(void);
-bool8 sub_8123514(void);
-void FreeRegionMapIconResources(void);
-u16 GetRegionMapSectionIdAt(u16 x, u16 y);
-void CreateRegionMapPlayerIcon(u16 x, u16 y);
-void CreateRegionMapCursor(u16 tileTag, u16 paletteTag);
 u8 *GetMapName(u8 *dest, u16 mapsec, u16 fill);
-bool32 sub_8124668(u8 mapSecId);
 u8 *GetMapNameGeneric(u8 *dest, u16 mapsec);
 void sub_80BFF50(u8 a0, void (*a1)(void));
 void MCB2_FlyMap(void);
diff --git a/src/region_map.c b/src/region_map.c
index 6678a226a..f997791ba 100644
--- a/src/region_map.c
+++ b/src/region_map.c
@@ -10,6 +10,8 @@
 #include "region_map.h"
 #include "window.h"
 #include "sound.h"
+#include "party_menu.h"
+#include "field_effect.h"
 #include "new_menu_helpers.h"
 #include "menu.h"
 #include "string_util.h"
@@ -160,7 +162,7 @@ struct UnkStruct_20399E4
     struct Sprite * field_01C;
     u16 field_020;
     u16 field_022;
-    u16 field_024[0x080];
+    u16 field_024[0x80];
 }; // size = 0x124
 
 struct UnkStruct_20399E8
@@ -208,6 +210,13 @@ struct UnkStruct_20399F0
     u16 win1v;
 };
 
+struct UnkStruct_20399FC
+{
+    u8 field_0;
+    u8 field_1;
+    u8 field_2;
+};
+
 EWRAM_DATA struct UnkStruct_20399D4 * gUnknown_20399D4 = NULL;
 EWRAM_DATA struct UnkStruct_20399D8 * gUnknown_20399D8 = NULL;
 EWRAM_DATA struct UnkStruct_20399DC * gUnknown_20399DC = NULL;
@@ -216,7 +225,7 @@ EWRAM_DATA struct UnkStruct_20399E4 * gUnknown_20399E4 = NULL;
 EWRAM_DATA struct UnkStruct_20399E8 * gUnknown_20399E8 = NULL;
 EWRAM_DATA struct UnkStruct_20399EC * gUnknown_20399EC = NULL;
 EWRAM_DATA struct UnkStruct_20399F0 * gUnknown_20399F0[3] = {};
-EWRAM_DATA void * gUnknown_20399FC = NULL;
+EWRAM_DATA struct UnkStruct_20399FC * gUnknown_20399FC = NULL;
 
 static void sub_80BFFD0(void);
 void sub_80C0100(void);
@@ -315,6 +324,9 @@ void sub_80C4E18(const u8 *str);
 void sub_80C4E74(const u8 *str);
 void sub_80C4ED0(bool8 a0);
 void sub_80C4F08(u8 taskId);
+void sub_80C51E8(void);
+void sub_80C5208(u8 taskId);
+void sub_80C527C(u16 a0);
 
 #include "data/text/map_section_names.h"
 extern const u16 gUnknown_83EF23C[];
@@ -375,6 +387,7 @@ extern const union AnimCmd *const gUnknown_83F1C94[];
 extern const union AnimCmd *const gUnknown_83F1C98[];
 extern const u16 gUnknown_83F1CA0[];
 extern const u8 gUnknown_83F1CA4[][2];
+extern const u8 gUnknown_83F1CA8[];
 extern const u8 *const gUnknown_83F1CAC[];
 extern const u16 gUnknown_83F1E60[][2];
 extern const u16 gUnknown_83F2178[][2];
@@ -382,6 +395,7 @@ extern const u8 gUnknown_83F2490[][15][22];
 extern const u8 gUnknown_83F2724[][15][22];
 extern const u8 gUnknown_83F29B8[][15][22];
 extern const u8 gUnknown_83F2C4C[][15][22];
+extern const u8 gUnknown_83F2EE0[][3];
 
 static void RegionMap_DarkenPalette(u16 *pal, u16 size, u16 tint)
 {
@@ -3269,3 +3283,202 @@ u8 *sub_80C4E08(u8 *dest, u16 mapsec)
 {
     return GetMapNameGeneric(dest, mapsec);
 }
+
+void sub_80C4E18(const u8 *str)
+{
+    if (gUnknown_20399D4->field_4797[2] == 1)
+        FillWindowPixelBuffer(3, PIXEL_FILL(0));
+    else
+        FillWindowPixelBuffer(3, PIXEL_FILL(15));
+    AddTextPrinterParameterized3(3, 0, 0, 0, gUnknown_83F1CA8, 0, str);
+    CopyWindowToVram(3, 2);
+}
+
+void sub_80C4E74(const u8 *str)
+{
+    if (gUnknown_20399D4->field_4797[2] == 1)
+        FillWindowPixelBuffer(4, PIXEL_FILL(0));
+    else
+        FillWindowPixelBuffer(4, PIXEL_FILL(15));
+    AddTextPrinterParameterized3(4, 0, 0, 0, gUnknown_83F1CA8, 0, str);
+    CopyWindowToVram(4, 3);
+}
+
+void sub_80C4ED0(bool8 mode)
+{
+    if (!mode)
+    {
+        PutWindowTilemap(3);
+        PutWindowTilemap(4);
+    }
+    else
+    {
+        ClearWindowTilemap(3);
+        ClearWindowTilemap(4);
+    }
+}
+
+void MCB2_FlyMap(void)
+{
+    sub_80C51E8();
+    sub_80BFEDC(2);
+}
+
+void sub_80C4F08(u8 taskId)
+{
+    switch (gUnknown_20399FC->field_0)
+    {
+    case 0:
+        BeginNormalPaletteFade(0xFFFFFFFF, 0, 16, 0, RGB_BLACK);
+        sub_80C4398(sub_80C0E20(), taskId, sub_80C07E4());
+        sub_80C3008(0, 0);
+        sub_80C41D8(1, 1);
+        sub_80C3154(FALSE);
+        sub_80C4324(FALSE);
+        gUnknown_20399FC->field_0++;
+        break;
+    case 1:
+        if (sub_80C0E04(2) == TRUE)
+        {
+            sub_80C2208(taskId, sub_80C07E4());
+        }
+        else
+        {
+            ShowBg(0);
+            ShowBg(3);
+            ShowBg(1);
+            sub_80C4E18(gUnknown_8418EB5);
+            sub_80C48BC(sub_80C0E20(), 25, FALSE);
+            sub_80C4960(sub_80C0E20(), 25, FALSE);
+        }
+        gUnknown_20399FC->field_0++;
+        break;
+    case 2:
+        sub_80C4E74(gUnknown_8418EB0);
+        sub_80C4ED0(FALSE);
+        gUnknown_20399FC->field_0++;
+        break;
+    case 3:
+        if (!gPaletteFade.active)
+        {
+            sub_80C0B18();
+            PutWindowTilemap(0);
+            sub_80C0BB0();
+            PutWindowTilemap(1);
+            gUnknown_20399FC->field_0++;
+        }
+        break;
+    case 4:
+        switch (sub_80C3400())
+        {
+        case 1:
+        case 2:
+            break;
+        case 6:
+            gUnknown_20399FC->field_0 = 6;
+            break;
+        case 3:
+            if (sub_80C3AC8(0) == 2)
+                PlaySE(SE_Z_PAGE);
+            else
+                sub_80C0450();
+            sub_80C3178();
+            sub_80C0B18();
+            sub_80C0BB0();
+            sub_80C0B9C();
+            if (sub_80C3508() == 21 && sub_80C3514() == 13)
+            {
+                PlaySE(SE_W255);
+                sub_80C4E74(gUnknown_8418E95);
+            }
+            else if (sub_80C3AC8(0) == 2 || sub_80C3AC8(0) == 4)
+            {
+                sub_80C4E74(gUnknown_8418EB0);
+            }
+            else
+            {
+                sub_80C4E74(gUnknown_8418E8B);
+            }
+            break;
+        case 4:
+            if ((sub_80C3AC8(0) == 2 || sub_80C3AC8(0) == 4) && sub_80C0E04(3) == TRUE)
+            {
+                switch (get_map_light_level_by_bank_and_number(gSaveBlock1Ptr->location.mapGroup, gSaveBlock1Ptr->location.mapNum))
+                {
+                case 4:
+                case 8:
+                    gUnknown_20399FC->field_2 = FALSE;
+                    gUnknown_20399FC->field_0++;
+                    break;
+                default:
+                    PlaySE(SE_KAIFUKU);
+                    gUnknown_20399FC->field_2 = TRUE;
+                    gUnknown_20399FC->field_0++;
+                    break;
+                }
+            }
+            break;
+        case 5:
+            sub_80C0E70(sub_80C0E20(), taskId, sub_80C07F8);
+            break;
+        }
+        break;
+    case 5:
+        if (sub_80C0E04(2) == TRUE)
+            sub_80C2C1C(taskId);
+        gUnknown_20399FC->field_0++;
+        break;
+    case 6:
+        BeginNormalPaletteFade(0xFFFFFFFF, 0, 0, 16, RGB_BLACK);
+        gUnknown_20399FC->field_0++;
+        break;
+    default:
+        if (!gPaletteFade.active)
+        {
+            if (gUnknown_20399FC->field_2 == TRUE)
+                sub_80C527C(sub_80C3520());
+            sub_80C5208(taskId);
+        }
+        break;
+    }
+}
+
+void sub_80C51E8(void)
+{
+    gUnknown_20399FC = AllocZeroed(sizeof(struct UnkStruct_20399FC));
+    gUnknown_20399FC->field_0 = 0;
+    gUnknown_20399FC->field_1 = 0;
+}
+
+void sub_80C5208(u8 taskId)
+{
+    if (sub_80C0E04(2) == TRUE)
+        sub_80C25BC();
+    sub_80C4A04();
+    sub_80C3188();
+    sub_80C4348();
+    sub_80C4D30();
+    sub_80C0898();
+    DestroyTask(taskId);
+    FreeAllWindowBuffers();
+    if (gUnknown_20399FC->field_2 == TRUE)
+        SetMainCallback2(CB2_ReturnToField);
+    else
+        SetMainCallback2(CB2_ReturnToPartyMenuFromFlyMap);
+    FREE_IF_NOT_NULL(gUnknown_20399FC);
+}
+
+void sub_80C527C(u16 mapsec)
+{
+    u16 idx = mapsec - MAPSECS_KANTO;
+    if (gUnknown_83F2EE0[idx][2])
+    {
+        sub_805546C(gUnknown_83F2EE0[idx][2]);
+        sub_8124C1C(gUnknown_83F2EE0[idx]);
+    }
+    else
+    {
+        warp1_set_2(gUnknown_83F2EE0[idx][0], gUnknown_83F2EE0[idx][1], -1);
+    }
+    sub_80842C8();
+}