intro: through sub_80ED140

2 files changed, 241 insertions, 584 deletions

diff --git a/asm/intro.s b/asm/intro.s
index 024f65e73..dd561950f 100644
--- a/asm/intro.s
+++ b/asm/intro.s
@@ -5,588 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_80ECCA8
-sub_80ECCA8: @ 80ECCA8
-	push {r4,r5,lr}
-	sub sp, 0x8
-	adds r4, r0, 0
-	ldrb r0, [r4, 0x4]
-	cmp r0, 0x5
-	bhi _080ECD54
-	lsls r0, 2
-	ldr r1, _080ECCC0 @ =_080ECCC4
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_080ECCC0: .4byte _080ECCC4
-	.align 2, 0
-_080ECCC4:
-	.4byte _080ECCDC
-	.4byte _080ECCE6
-	.4byte _080ECCF6
-	.4byte _080ECD18
-	.4byte _080ECD20
-	.4byte _080ECD3E
-_080ECCDC:
-	bl sub_80EDED8
-	movs r0, 0
-	strh r0, [r4, 0x12]
-	b _080ECD36
-_080ECCE6:
-	ldrh r0, [r4, 0x12]
-	adds r0, 0x1
-	strh r0, [r4, 0x12]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x27
-	bls _080ECD54
-	b _080ECD36
-_080ECCF6:
-	ldr r1, _080ECD14 @ =0x00003f44
-	movs r0, 0x50
-	bl SetGpuReg
-	movs r0, 0x30
-	str r0, [sp]
-	movs r0, 0
-	str r0, [sp, 0x4]
-	movs r1, 0x10
-	movs r2, 0x10
-	movs r3, 0
-	bl StartBlendTask
-	b _080ECD36
-	.align 2, 0
-_080ECD14: .4byte 0x00003f44
-_080ECD18:
-	movs r0, 0x2
-	bl ShowBg
-	b _080ECD36
-_080ECD20:
-	bl IsBlendTaskActive
-	lsls r0, 24
-	lsrs r5, r0, 24
-	cmp r5, 0
-	bne _080ECD54
-	movs r0, 0x50
-	movs r1, 0
-	bl SetGpuReg
-	strh r5, [r4, 0x12]
-_080ECD36:
-	ldrb r0, [r4, 0x4]
-	adds r0, 0x1
-	strb r0, [r4, 0x4]
-	b _080ECD54
-_080ECD3E:
-	ldrh r0, [r4, 0x12]
-	adds r0, 0x1
-	strh r0, [r4, 0x12]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x32
-	bls _080ECD54
-	ldr r1, _080ECD5C @ =sub_80ECD60
-	adds r0, r4, 0
-	bl sub_80ECAA8
-_080ECD54:
-	add sp, 0x8
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080ECD5C: .4byte sub_80ECD60
-	thumb_func_end sub_80ECCA8
-
-	thumb_func_start sub_80ECD60
-sub_80ECD60: @ 80ECD60
-	push {r4-r6,lr}
-	sub sp, 0x8
-	adds r6, r0, 0
-	ldrb r0, [r6, 0x4]
-	cmp r0, 0x7
-	bls _080ECD6E
-	b _080ECE96
-_080ECD6E:
-	lsls r0, 2
-	ldr r1, _080ECD78 @ =_080ECD7C
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_080ECD78: .4byte _080ECD7C
-	.align 2, 0
-_080ECD7C:
-	.4byte _080ECD9C
-	.4byte _080ECDC4
-	.4byte _080ECDCC
-	.4byte _080ECE10
-	.4byte _080ECE26
-	.4byte _080ECE52
-	.4byte _080ECE64
-	.4byte _080ECE78
-_080ECD9C:
-	ldr r1, _080ECDC0 @ =0x00003f50
-	movs r0, 0x50
-	bl SetGpuReg
-	movs r5, 0x10
-	str r5, [sp]
-	movs r4, 0
-	str r4, [sp, 0x4]
-	movs r0, 0
-	movs r1, 0x10
-	movs r2, 0x10
-	movs r3, 0
-	bl StartBlendTask
-	strh r4, [r6, 0x8]
-	strh r5, [r6, 0xA]
-	strh r4, [r6, 0x12]
-	b _080ECE70
-	.align 2, 0
-_080ECDC0: .4byte 0x00003f50
-_080ECDC4:
-	bl sub_80EDF68
-	str r0, [r6, 0x14]
-	b _080ECE70
-_080ECDCC:
-	bl IsBlendTaskActive
-	lsls r0, 24
-	cmp r0, 0
-	bne _080ECE96
-	adds r1, r6, 0
-	adds r1, 0x3C
-	movs r0, 0x20
-	str r0, [sp]
-	movs r0, 0x40
-	str r0, [sp, 0x4]
-	movs r0, 0
-	movs r2, 0x38
-	movs r3, 0x6
-	bl BlitBitmapToWindow
-	ldr r0, _080ECE0C @ =0x0000043c
-	adds r1, r6, r0
-	movs r0, 0x90
-	str r0, [sp]
-	movs r0, 0x10
-	str r0, [sp, 0x4]
-	movs r0, 0
-	movs r2, 0
-	movs r3, 0x28
-	bl BlitBitmapToWindow
-	movs r0, 0
-	movs r1, 0x2
-	bl CopyWindowToVram
-	b _080ECE70
-	.align 2, 0
-_080ECE0C: .4byte 0x0000043c
-_080ECE10:
-	bl IsDma3ManagerBusyWithBgCopy
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0
-	bne _080ECE96
-	ldr r0, [r6, 0x14]
-	bl DestroySprite
-	strh r4, [r6, 0x12]
-	b _080ECE70
-_080ECE26:
-	ldrh r0, [r6, 0x12]
-	adds r0, 0x1
-	strh r0, [r6, 0x12]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x5A
-	bls _080ECE96
-	movs r0, 0x50
-	movs r1, 0x4
-	bl SetGpuRegBits
-	movs r0, 0x14
-	str r0, [sp]
-	movs r0, 0
-	str r0, [sp, 0x4]
-	movs r0, 0x10
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0x10
-	bl StartBlendTask
-	b _080ECE70
-_080ECE52:
-	bl IsBlendTaskActive
-	lsls r0, 24
-	cmp r0, 0
-	bne _080ECE96
-	movs r0, 0x2
-	bl HideBg
-	b _080ECE70
-_080ECE64:
-	bl ResetSpriteData
-	bl FreeAllSpritePalettes
-	movs r0, 0
-	strh r0, [r6, 0x12]
-_080ECE70:
-	ldrb r0, [r6, 0x4]
-	adds r0, 0x1
-	strb r0, [r6, 0x4]
-	b _080ECE96
-_080ECE78:
-	ldrh r0, [r6, 0x12]
-	adds r0, 0x1
-	strh r0, [r6, 0x12]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x14
-	bls _080ECE96
-	movs r0, 0x50
-	movs r1, 0
-	bl SetGpuReg
-	ldr r1, _080ECEA0 @ =sub_80ECEA4
-	adds r0, r6, 0
-	bl sub_80ECAA8
-_080ECE96:
-	add sp, 0x8
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080ECEA0: .4byte sub_80ECEA4
-	thumb_func_end sub_80ECD60
-
-	thumb_func_start sub_80ECEA4
-sub_80ECEA4: @ 80ECEA4
-	push {r4,r5,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	ldrb r0, [r5, 0x4]
-	cmp r0, 0x5
-	bls _080ECEB2
-	b _080ED094
-_080ECEB2:
-	lsls r0, 2
-	ldr r1, _080ECEBC @ =_080ECEC0
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_080ECEBC: .4byte _080ECEC0
-	.align 2, 0
-_080ECEC0:
-	.4byte _080ECED8
-	.4byte _080ECF64
-	.4byte _080ECFA4
-	.4byte _080ECFD8
-	.4byte _080ED000
-	.4byte _080ED064
-_080ECED8:
-	movs r0, 0
-	bl SetVBlankCallback
-	ldr r0, _080ECF48 @ =gUnknown_8402D34
-	movs r1, 0x10
-	movs r2, 0x20
-	bl LoadPalette
-	ldr r0, _080ECF4C @ =gUnknown_84048CC
-	movs r1, 0x20
-	movs r2, 0x20
-	bl LoadPalette
-	ldr r2, _080ECF50 @ =0x00007fff
-	movs r0, 0x6
-	movs r1, 0x10
-	bl BlendPalettes
-	ldr r1, _080ECF54 @ =gUnknown_840BB88
-	movs r0, 0
-	movs r2, 0x2
-	bl InitBgsFromTemplates
-	ldr r1, _080ECF58 @ =gUnknown_84048EC
-	movs r0, 0
-	str r0, [sp]
-	movs r0, 0x1
-	movs r2, 0
-	movs r3, 0
-	bl DecompressAndCopyTileDataToVram
-	ldr r1, _080ECF5C @ =gUnknown_8404F7C
-	movs r0, 0x1
-	str r0, [sp]
-	movs r2, 0
-	movs r3, 0
-	bl DecompressAndCopyTileDataToVram
-	movs r0, 0x1
-	bl ShowBg
-	movs r0, 0
-	bl HideBg
-	movs r0, 0x2
-	bl HideBg
-	movs r0, 0x3
-	bl HideBg
-	bl sub_80EEBE4
-	ldr r0, _080ECF60 @ =sub_80EC9EC
-	bl SetVBlankCallback
-	b _080ECFF0
-	.align 2, 0
-_080ECF48: .4byte gUnknown_8402D34
-_080ECF4C: .4byte gUnknown_84048CC
-_080ECF50: .4byte 0x00007fff
-_080ECF54: .4byte gUnknown_840BB88
-_080ECF58: .4byte gUnknown_84048EC
-_080ECF5C: .4byte gUnknown_8404F7C
-_080ECF60: .4byte sub_80EC9EC
-_080ECF64:
-	bl FreeTempTileDataBuffersIfPossible
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0
-	beq _080ECF72
-	b _080ED094
-_080ECF72:
-	ldr r1, _080ECF9C @ =gUnknown_8402D54
-	str r0, [sp]
-	movs r0, 0
-	movs r2, 0
-	movs r3, 0
-	bl DecompressAndCopyTileDataToVram
-	ldr r1, _080ECFA0 @ =gUnknown_8403FE8
-	movs r0, 0x1
-	str r0, [sp]
-	movs r0, 0
-	movs r2, 0
-	movs r3, 0
-	bl DecompressAndCopyTileDataToVram
-	bl ResetBgPositions
-	movs r0, 0x1
-	bl ShowBg
-	b _080ECFF0
-	.align 2, 0
-_080ECF9C: .4byte gUnknown_8402D54
-_080ECFA0: .4byte gUnknown_8403FE8
-_080ECFA4:
-	bl FreeTempTileDataBuffersIfPossible
-	lsls r0, 24
-	cmp r0, 0
-	bne _080ED094
-	movs r0, 0
-	bl ShowBg
-	ldr r0, _080ECFD0 @ =sub_80ED0AC
-	movs r1, 0
-	bl CreateTask
-	movs r1, 0x2
-	negs r1, r1
-	ldr r0, _080ECFD4 @ =0x00007fff
-	str r0, [sp]
-	movs r0, 0x6
-	movs r2, 0x10
-	movs r3, 0
-	bl BeginNormalPaletteFade
-	b _080ECFF0
-	.align 2, 0
-_080ECFD0: .4byte sub_80ED0AC
-_080ECFD4: .4byte 0x00007fff
-_080ECFD8:
-	ldr r0, _080ECFF8 @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0
-	bne _080ED094
-	ldr r0, _080ECFFC @ =0x00000115
-	bl m4aSongNumStart
-	strh r4, [r5, 0x12]
-_080ECFF0:
-	ldrb r0, [r5, 0x4]
-	adds r0, 0x1
-	strb r0, [r5, 0x4]
-	b _080ED094
-	.align 2, 0
-_080ECFF8: .4byte gPaletteFade
-_080ECFFC: .4byte 0x00000115
-_080ED000:
-	ldrh r0, [r5, 0x12]
-	adds r0, 0x1
-	strh r0, [r5, 0x12]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x14
-	bne _080ED01A
-	ldr r0, _080ED054 @ =sub_80ED140
-	movs r1, 0
-	bl CreateTask
-	bl sub_80ED118
-_080ED01A:
-	ldrh r0, [r5, 0x12]
-	cmp r0, 0x1D
-	bls _080ED094
-	movs r0, 0x2
-	negs r0, r0
-	ldr r2, _080ED058 @ =0x00007fff
-	movs r1, 0x10
-	bl BlendPalettes
-	ldr r0, _080ED05C @ =sub_80ED0AC
-	bl FindTaskIdByFunc
-	lsls r0, 24
-	lsrs r0, 24
-	bl DestroyTask
-	ldr r0, _080ED054 @ =sub_80ED140
-	bl FindTaskIdByFunc
-	lsls r0, 24
-	lsrs r0, 24
-	bl DestroyTask
-	ldr r1, _080ED060 @ =sub_80ED188
-	adds r0, r5, 0
-	bl sub_80ECAA8
-	b _080ED094
-	.align 2, 0
-_080ED054: .4byte sub_80ED140
-_080ED058: .4byte 0x00007fff
-_080ED05C: .4byte sub_80ED0AC
-_080ED060: .4byte sub_80ED188
-_080ED064:
-	ldr r0, _080ED09C @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	bne _080ED094
-	ldr r0, _080ED0A0 @ =sub_80ED0AC
-	bl FindTaskIdByFunc
-	lsls r0, 24
-	lsrs r0, 24
-	bl DestroyTask
-	ldr r0, _080ED0A4 @ =sub_80ED140
-	bl FindTaskIdByFunc
-	lsls r0, 24
-	lsrs r0, 24
-	bl DestroyTask
-	ldr r1, _080ED0A8 @ =sub_80ED188
-	adds r0, r5, 0
-	bl sub_80ECAA8
-_080ED094:
-	add sp, 0x4
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080ED09C: .4byte gPaletteFade
-_080ED0A0: .4byte sub_80ED0AC
-_080ED0A4: .4byte sub_80ED140
-_080ED0A8: .4byte sub_80ED188
-	thumb_func_end sub_80ECEA4
-
-	thumb_func_start sub_80ED0AC
-sub_80ED0AC: @ 80ED0AC
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	ldr r0, _080ED114 @ =gTasks+0x8
-	adds r4, r1, r0
-	ldrh r0, [r4]
-	adds r0, 0x1
-	strh r0, [r4]
-	lsls r0, 16
-	asrs r0, 16
-	cmp r0, 0x5
-	ble _080ED0EC
-	movs r1, 0
-	strh r1, [r4]
-	ldrh r0, [r4, 0x2]
-	adds r0, 0x1
-	strh r0, [r4, 0x2]
-	lsls r0, 16
-	asrs r0, 16
-	cmp r0, 0x2
-	ble _080ED0DE
-	strh r1, [r4, 0x2]
-_080ED0DE:
-	movs r0, 0x2
-	ldrsh r1, [r4, r0]
-	lsls r1, 15
-	movs r0, 0
-	movs r2, 0
-	bl ChangeBgY
-_080ED0EC:
-	movs r1, 0x4
-	ldrsh r0, [r4, r1]
-	cmp r0, 0
-	beq _080ED10C
-	movs r1, 0x90
-	lsls r1, 1
-	adds r0, r1, 0
-	ldrh r1, [r4, 0x6]
-	adds r0, r1
-	strh r0, [r4, 0x6]
-	movs r0, 0x6
-	ldrsh r1, [r4, r0]
-	movs r0, 0
-	movs r2, 0x2
-	bl ChangeBgY
-_080ED10C:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080ED114: .4byte gTasks+0x8
-	thumb_func_end sub_80ED0AC
-
-	thumb_func_start sub_80ED118
-sub_80ED118: @ 80ED118
-	push {lr}
-	ldr r0, _080ED138 @ =sub_80ED0AC
-	bl FindTaskIdByFunc
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _080ED13C @ =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r2
-	movs r0, 0x1
-	strh r0, [r1, 0xC]
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080ED138: .4byte sub_80ED0AC
-_080ED13C: .4byte gTasks
-	thumb_func_end sub_80ED118
-
-	thumb_func_start sub_80ED140
-sub_80ED140: @ 80ED140
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	ldr r0, _080ED184 @ =gTasks+0x8
-	adds r1, r0
-	ldrh r0, [r1]
-	adds r0, 0x1
-	strh r0, [r1]
-	lsls r0, 16
-	asrs r0, 16
-	cmp r0, 0x3
-	ble _080ED17E
-	movs r0, 0
-	strh r0, [r1]
-	ldrh r2, [r1, 0x2]
-	movs r3, 0x2
-	ldrsh r0, [r1, r3]
-	cmp r0, 0x1
-	bgt _080ED170
-	adds r0, r2, 0x1
-	strh r0, [r1, 0x2]
-_080ED170:
-	movs r0, 0x2
-	ldrsh r1, [r1, r0]
-	lsls r1, 15
-	movs r0, 0x1
-	movs r2, 0
-	bl ChangeBgY
-_080ED17E:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080ED184: .4byte gTasks+0x8
-	thumb_func_end sub_80ED140
-
 	thumb_func_start sub_80ED188
 sub_80ED188: @ 80ED188
 	push {r4-r7,lr}
diff --git a/src/intro.c b/src/intro.c
index 216605be7..51fbbac74 100644
--- a/src/intro.c
+++ b/src/intro.c
@@ -21,9 +21,13 @@ struct IntroSequenceData
     void (*field_0000)(struct IntroSequenceData *);
     u8 field_0004;
     u8 field_0005;
-    u8 filler_0006[0xC];
+    u8 filler_0006[2];
+    u16 field_0008;
+    u16 field_000A;
+    u8 field_000C[6];
     u16 field_0012;
-    u8 filler_0014[0x28];
+    struct Sprite * field_0014;
+    u8 filler_0018[0x24];
     u8 field_003C[0x400];
     u8 field_043C[0x400];
     u8 filler_083C[0x2080];
@@ -42,9 +46,18 @@ void sub_80ECAF0(struct IntroSequenceData * ptr);
 void sub_80ECB98(struct IntroSequenceData * ptr);
 void sub_80ECC3C(struct IntroSequenceData * ptr);
 void sub_80ECCA8(struct IntroSequenceData * ptr);
+void sub_80ECD60(struct IntroSequenceData * ptr);
+void sub_80ECEA4(struct IntroSequenceData * ptr);
+void sub_80ED0AC(u8 taskId);
+void sub_80ED118(void);
+void sub_80ED140(u8 taskId);
+void sub_80ED188(struct IntroSequenceData * ptr);
 void sub_80EDBE8(struct IntroSequenceData * ptr);
 void sub_80EDC40(void);
 void sub_80EDDF0(void);
+void sub_80EDED8(void);
+struct Sprite * sub_80EDF68(void);
+void sub_80EEBE4(void);
 
 extern const u32 gMultiBootProgram_PokemonColosseum_Start[];
 
@@ -57,10 +70,18 @@ extern const u8 gUnknown_8402668[];
 extern const u16 gUnknown_840270C[];
 extern const u8 gUnknown_840272C[];
 extern const u8 gUnknown_84028F8[];
+extern const u16 gUnknown_8402D34[];
+extern const u8 gUnknown_8402D54[];
+extern const u8 gUnknown_8403FE8[];
+extern const u16 gUnknown_84048CC[];
+extern const u8 gUnknown_84048EC[];
+extern const u8 gUnknown_8404F7C[];
 
 extern const struct BgTemplate gUnknown_840BB80[2];
+extern const struct BgTemplate gUnknown_840BB88[2];
 extern const struct WindowTemplate gUnknown_840BBA8[];
 
+
 void sub_80EC5A4(void)
 {
     LoadOam();
@@ -351,3 +372,221 @@ void sub_80ECC3C(struct IntroSequenceData * this)
         break;
     }
 }
+
+void sub_80ECCA8(struct IntroSequenceData * this)
+{
+    switch (this->field_0004)
+    {
+    case 0:
+        sub_80EDED8();
+        this->field_0012 = 0;
+        this->field_0004++;
+        break;
+    case 1:
+        this->field_0012++;
+        if (this->field_0012 >= 40)
+            this->field_0004++;
+        break;
+    case 2:
+        SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG2 | BLDCNT_EFFECT_BLEND | BLDCNT_TGT2_BG0 | BLDCNT_TGT2_BG1 | BLDCNT_TGT2_BG2 | BLDCNT_TGT2_BG3 | BLDCNT_TGT2_OBJ | BLDCNT_TGT2_BD);
+        StartBlendTask(0, 16, 16, 0, 48, 0);
+        this->field_0004++;
+        break;
+    case 3:
+        ShowBg(2);
+        this->field_0004++;
+        break;
+    case 4:
+        if (!IsBlendTaskActive())
+        {
+            SetGpuReg(REG_OFFSET_BLDCNT, 0);
+            this->field_0012 = 0;
+            this->field_0004++;
+        }
+        break;
+    case 5:
+        this->field_0012++;
+        if (this->field_0012 > 50)
+            sub_80ECAA8(this, sub_80ECD60);
+        break;
+    }
+}
+
+void sub_80ECD60(struct IntroSequenceData * this)
+{
+    switch (this->field_0004)
+    {
+    case 0:
+        SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_OBJ | BLDCNT_EFFECT_BLEND | BLDCNT_TGT2_BG0 | BLDCNT_TGT2_BG1 | BLDCNT_TGT2_BG2 | BLDCNT_TGT2_BG3 | BLDCNT_TGT2_OBJ | BLDCNT_TGT2_BD);
+        StartBlendTask(0, 16, 16, 0, 16, 0);
+        this->field_0008 = 0;
+        this->field_000A = 16;
+        this->field_0012 = 0;
+        this->field_0004++;
+        break;
+    case 1:
+        this->field_0014 = sub_80EDF68();
+        this->field_0004++;
+        break;
+    case 2:
+        if (!IsBlendTaskActive())
+        {
+            BlitBitmapToWindow(0, this->field_003C, 0x38, 0x06, 0x20, 0x40);
+            BlitBitmapToWindow(0, this->field_043C, 0x00, 0x28, 0x90, 0x10);
+            CopyWindowToVram(0, 2);
+            this->field_0004++;
+        }
+        break;
+    case 3:
+        if (!IsDma3ManagerBusyWithBgCopy())
+        {
+            DestroySprite(this->field_0014);
+            this->field_0012 = 0;
+            this->field_0004++;
+        }
+        break;
+    case 4:
+        this->field_0012++;
+        if (this->field_0012 > 90)
+        {
+            SetGpuRegBits(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG2);
+            StartBlendTask(16, 0, 0, 16, 20, 0);
+            this->field_0004++;
+        }
+        break;
+    case 5:
+        if (!IsBlendTaskActive())
+        {
+            HideBg(2);
+            this->field_0004++;
+        }
+        break;
+    case 6:
+        ResetSpriteData();
+        FreeAllSpritePalettes();
+        this->field_0012 = 0;
+        this->field_0004++;
+        break;
+    case 7:
+        this->field_0012++;
+        if (this->field_0012 > 20)
+        {
+            SetGpuReg(REG_OFFSET_BLDCNT, 0);
+            sub_80ECAA8(this, sub_80ECEA4);
+        }
+        break;
+    }
+}
+
+void sub_80ECEA4(struct IntroSequenceData * this)
+{
+    switch (this->field_0004)
+    {
+    case 0:
+        SetVBlankCallback(NULL);
+        LoadPalette(gUnknown_8402D34, 0x10, 0x20);
+        LoadPalette(gUnknown_84048CC, 0x20, 0x20);
+        BlendPalettes(0x06, 0x10, RGB_WHITE);
+        InitBgsFromTemplates(0, gUnknown_840BB88, NELEMS(gUnknown_840BB88));
+        DecompressAndCopyTileDataToVram(1, gUnknown_84048EC, 0, 0, 0);
+        DecompressAndCopyTileDataToVram(1, gUnknown_8404F7C, 0, 0, 1);
+        ShowBg(1);
+        HideBg(0);
+        HideBg(2);
+        HideBg(3);
+        sub_80EEBE4();
+        SetVBlankCallback(sub_80EC9EC);
+        this->field_0004++;
+        break;
+    case 1:
+        if (!FreeTempTileDataBuffersIfPossible())
+        {
+            DecompressAndCopyTileDataToVram(0, gUnknown_8402D54, 0, 0, 0);
+            DecompressAndCopyTileDataToVram(0, gUnknown_8403FE8, 0, 0, 1);
+            ResetBgPositions();
+            ShowBg(1);
+            this->field_0004++;
+        }
+        break;
+    case 2:
+        if (!FreeTempTileDataBuffersIfPossible())
+        {
+            ShowBg(0);
+            CreateTask(sub_80ED0AC, 0);
+            BeginNormalPaletteFade(0x00000006, -2, 16, 0, RGB_WHITE);
+            this->field_0004++;
+        }
+        break;
+    case 3:
+        if (!gPaletteFade.active)
+        {
+            m4aSongNumStart(BGM_FRLG_OPENING);
+            this->field_0012 = 0;
+            this->field_0004++;
+        }
+        break;
+    case 4:
+        this->field_0012++;
+        if (this->field_0012 == 20)
+        {
+            CreateTask(sub_80ED140, 0);
+            sub_80ED118();
+        }
+        if (this->field_0012 >= 30)
+        {
+            BlendPalettes(-2, 16, RGB_WHITE);
+            DestroyTask(FindTaskIdByFunc(sub_80ED0AC));
+            DestroyTask(FindTaskIdByFunc(sub_80ED140));
+            sub_80ECAA8(this, sub_80ED188);
+        }
+        break;
+    case 5:
+        if (!gPaletteFade.active)
+        {
+            DestroyTask(FindTaskIdByFunc(sub_80ED0AC));
+            DestroyTask(FindTaskIdByFunc(sub_80ED140));
+            sub_80ECAA8(this, sub_80ED188);
+        }
+        break;
+    }
+}
+
+void sub_80ED0AC(u8 taskId)
+{
+    s16 * data = gTasks[taskId].data;
+
+    data[0]++;
+    if (data[0] > 5)
+    {
+        data[0] = 0;
+        data[1]++;
+        if (data[1] > 2)
+            data[1] = 0;
+        ChangeBgY(0, data[1] << 15, 0);
+    }
+    if (data[2])
+    {
+        data[3] += 0x120;
+        ChangeBgY(0, data[3], 2);
+    }
+}
+
+void sub_80ED118(void)
+{
+    u8 taskId = FindTaskIdByFunc(sub_80ED0AC);
+    gTasks[taskId].data[2] = TRUE;
+}
+
+void sub_80ED140(u8 taskId)
+{
+    s16 * data = gTasks[taskId].data;
+
+    data[0]++;
+    if (data[0] > 3)
+    {
+        data[0] = 0;
+        if (data[1] < 2)
+            data[1]++;
+        ChangeBgY(1, data[1] << 15, 0);
+    }
+}