evo graphics file is done

asm/evolution_scene.s

@@ -338,7 +338,7 @@ EvolutionScene: @ 813DA8C
 	movs r2, 0x4
 	orrs r0, r2
 	strb r0, [r1]
-	bl sub_817BE78
+	bl LoadEvoSparkleSpriteAndPal
 	ldr r0, =evovle_mon_maybe
 	movs r1, 0
 	bl CreateTask
@@ -917,7 +917,7 @@ sub_813E1D4: @ 813E1D4
 	movs r2, 0x4
 	orrs r0, r2
 	strb r0, [r1]
-	bl sub_817BE78
+	bl LoadEvoSparkleSpriteAndPal
 	ldr r0, =sub_813F1B8
 	movs r1, 0
 	bl CreateTask
@@ -1421,7 +1421,7 @@ _0813E7C0:
 	movs r0, 0
 	bl sub_8140000
 	movs r0, 0x11
-	bl sub_817BE94
+	bl LaunchTask_PreEvoSparklesSet1
 	ldr r1, =gBattleCommunication
 	strb r0, [r1, 0x2]
 	ldr r0, =gTasks
@@ -1454,7 +1454,7 @@ _0813E7FE:
 	ldr r1, [r0]
 	movs r0, 0x1
 	strb r0, [r1, 0x3]
-	bl sub_817BFB4
+	bl LaunchTask_PreEvoSparklesSet2
 	strb r0, [r4, 0x2]
 	bl _0813F1A4
 	.pool
@@ -1514,7 +1514,7 @@ _0813E890:
 	b _0813EC52
 	.pool
 _0813E8A4:
-	bl sub_817C068
+	bl LaunchTask_PostEvoSparklesSet1
 	ldr r1, =gBattleCommunication
 	strb r0, [r1, 0x2]
 	ldr r0, =gTasks
@@ -1541,7 +1541,7 @@ _0813E8D6:
 	lsls r4, 3
 	adds r4, r5
 	ldrh r0, [r4, 0xC]
-	bl sub_817C144
+	bl LaunchTask_PostEvoSparklesSet2AndFlash
 	strb r0, [r6, 0x2]
 	b _0813EB96
 	.pool
@@ -2631,7 +2631,7 @@ _0813F324:
 	adds r6, r0, 0
 	adds r6, 0x10
 	adds r0, r6, 0
-	bl sub_817BE94
+	bl LaunchTask_PreEvoSparklesSet1
 	ldr r1, =gBattleCommunication
 	strb r0, [r1, 0x2]
 	ldr r1, =gTasks
@@ -2670,7 +2670,7 @@ _0813F396:
 	ldr r1, [r0]
 	movs r0, 0x1
 	strb r0, [r1, 0x3]
-	bl sub_817BFB4
+	bl LaunchTask_PreEvoSparklesSet2
 	strb r0, [r4, 0x2]
 	bl _0813FCC4
 	.pool
@@ -2722,7 +2722,7 @@ _0813F420:
 	b _0813F6AC
 	.pool
 _0813F42C:
-	bl sub_817C068
+	bl LaunchTask_PostEvoSparklesSet1
 	ldr r1, =gBattleCommunication
 	strb r0, [r1, 0x2]
 	ldr r1, =gTasks
@@ -2749,7 +2749,7 @@ _0813F45E:
 	lsls r4, 3
 	adds r4, r5
 	ldrh r0, [r4, 0xC]
-	bl sub_817C280
+	bl LaunchTask_PostEvoSparklesSet2AndFlash_Trade
 	strb r0, [r6, 0x2]
 	b _0813F6F2
 	.pool

data/evolution_graphics.s

@@ -1,15 +0,0 @@
-	.include "asm/macros.inc"
-	.include "constants/constants.inc"
-
-	.section .rodata
-
-	.incbin "baserom.gba", 0x5f53cc, 0x40
-
-gUnknown_085F540C:: @ 85F540C
-	.incbin "baserom.gba", 0x5f540c, 0x10
-
-gUnknown_085F541C:: @ 85F541C
-	.incbin "baserom.gba", 0x5f541c, 0x24
-
-gUnknown_085F5440:: @ 85F5440
-	.incbin "baserom.gba", 0x5f5440, 0x18

graphics/misc/evo_sparkle.pal

@@ -0,0 +1,19 @@
+JASC-PAL
+0100
+16
+0 0 0
+0 0 0
+0 0 0
+0 0 0
+0 0 0
+0 0 0
+0 0 0
+0 0 0
+49 82 82
+82 106 106
+106 131 131
+139 156 156
+164 180 180
+197 205 205
+222 230 230
+255 255 255

include/evolution_graphics.h

@@ -0,0 +1,15 @@
+#ifndef GUARD_EVOLUTION_GRAPHICS_H
+#define GUARD_EVOLUTION_GRAPHICS_H
+
+void LoadEvoSparkleSpriteAndPal(void);
+
+u8 LaunchTask_PreEvoSparklesSet1(u16 arg0);
+u8 LaunchTask_PreEvoSparklesSet2(void);
+u8 LaunchTask_PostEvoSparklesSet1(void);
+u8 LaunchTask_PostEvoSparklesSet2AndFlash(u16 species);
+u8 LaunchTask_PostEvoSparklesSet2AndFlash_Trade(u16 species);
+u8 sub_817C3A0(u8 preEvoSpriteID, u8 postEvoSpriteID);
+
+#define EvoGraphicsTaskEvoStop  data[8]
+
+#endif // GUARD_EVOLUTION_GRAPHICS_H

ld_script.txt

@@ -226,7 +226,6 @@ SECTIONS {
         src/clear_save_data_screen.o(.text);
         asm/intro_credits_graphics.o(.text);
         src/evolution_graphics.o(.text);
-        asm/evolution_graphics.o(.text);
         asm/bard_music.o(.text);
         asm/fldeff_teleport.o(.text);
         asm/battle_link_817C95C.o(.text);
@@ -448,7 +447,6 @@ SECTIONS {
         data/pokeblock_feed.o(.rodata);
         src/clear_save_data_screen.o(.rodata);
         data/intro_credits_graphics.o(.rodata);
-        data/evolution_graphics.o(.rodata);
         src/evolution_graphics.o(.rodata);
         data/bard_music.o(.rodata);
         data/data_860A4AC.o(.rodata);

src/evolution_graphics.c

@@ -1,5 +1,5 @@
 #include "global.h"
-//#include "evolution_graphics.h"
+#include "evolution_graphics.h"
 #include "sprite.h"
 #include "trig.h"
 #include "rng.h"
@@ -9,6 +9,82 @@
 #include "songs.h"
 #include "palette.h"
 
+// this file's functions
+static void EvoSparkle_DummySpriteCb(struct Sprite* sprite);
+static void EvoTask_BeginPreSet1_FadeAndPlaySE(u8 taskID);
+static void EvoTask_CreatePreEvoSparkleSet1(u8 taskID);
+static void EvoTask_WaitForPre1SparklesToGoUp(u8 taskID);
+static void EvoTask_BeginPreSparklesSet2(u8 taskID);
+static void EvoTask_CreatePreEvoSparklesSet2(u8 taskID);
+static void EvoTask_DestroyPreSet2Task(u8 taskID);
+static void EvoTask_BeginPostSparklesSet1(u8 taskID);
+static void EvoTask_CreatePostEvoSparklesSet1(u8 taskID);
+static void EvoTask_DestroyPostSet1Task(u8 taskID);
+static void EvoTask_BeginPostSparklesSet2_AndFlash(u8 taskID);
+static void EvoTask_CreatePostEvoSparklesSet2_AndFlash(u8 taskID);
+static void EvoTask_BeginPostSparklesSet2_AndFlash_Trade(u8 taskID);
+static void EvoTask_CreatePostEvoSparklesSet2_AndFlash_Trade(u8 taskID);
+static void EvoTask_DestroyPostSet2AndFlashTask(u8 taskID);
+static void sub_817C4EC(u8 taskID);
+static void sub_817C510(u8 taskID);
+static void PreEvoVisible_PostEvoInvisible_KillTask(u8 taskID);
+static void PreEvoInvisible_PostEvoVisible_KillTask(u8 taskID);
+static void sub_817C560(u8 taskID);
+
+static const u16 sEvoSparklePalette[] = INCBIN_U16("graphics/misc/evo_sparkle.gbapal");
+static const u8 sEvoSparkleTiles[] = INCBIN_U8("graphics/misc/evo_sparkle.4bpp.lz");
+
+static const struct CompressedSpriteSheet sEvoSparkleSpriteSheets[] =
+{
+    {sEvoSparkleTiles, 0x20, 1001},
+    {NULL, 0, 0}
+};
+
+static const struct SpritePalette sEvoSparkleSpritePals[] =
+{
+    {sEvoSparklePalette, 1001},
+    {NULL, 0}
+};
+
+static const struct OamData sOamData_EvoSparkle =
+{
+    .y = 160,
+    .affineMode = 0,
+    .objMode = 0,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 0,
+    .tileNum = 0,
+    .priority = 1,
+    .paletteNum = 0,
+    .affineParam = 0,
+};
+
+static const union AnimCmd sSpriteAnim_EvoSparkle[] =
+{
+    ANIMCMD_FRAME(0, 8),
+    ANIMCMD_END
+};
+
+static const union AnimCmd *const sSpriteAnimTable_EvoSparkle[] =
+{
+    sSpriteAnim_EvoSparkle,
+};
+
+static const struct SpriteTemplate sEvoSparkleSpriteTemplate =
+{
+    .tileTag = 1001,
+    .paletteTag = 1001,
+    .oam = &sOamData_EvoSparkle,
+    .anims = sSpriteAnimTable_EvoSparkle,
+    .images = NULL,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .callback = EvoSparkle_DummySpriteCb
+};
+
 static const s16 sEvoSparkleMatricies[] =
 {
     0x3C0, 0x380, 0x340, 0x300, 0x2C0, 0x280, 0x240, 0x200, 0x1C0,
@@ -16,12 +92,12 @@ static const s16 sEvoSparkleMatricies[] =
     -1, 0x70, 0x1, 0x70, 0x2, 0x50, 0x3, 0x30, 0x4, 0x10
 };
 
-void EvoSparkle_DummySpriteCb(struct Sprite *sprite)
+static void EvoSparkle_DummySpriteCb(struct Sprite *sprite)
 {
 
 }
 
-void SetEvoSparklesMatrices(void)
+static void SetEvoSparklesMatrices(void)
 {
     u16 i;
     for (i = 0; i < 12; i++)
@@ -29,3 +105,507 @@ void SetEvoSparklesMatrices(void)
         SetOamMatrix(20 + i, sEvoSparkleMatricies[i], 0, 0, sEvoSparkleMatricies[i]);
     }
 }
+
+static void SpriteCB_PreEvoSparkleSet1(struct Sprite* sprite)
+{
+    if (sprite->pos1.y > 8)
+    {
+        u8 matrixNum;
+
+        sprite->pos1.y = 88 - (sprite->data7 * sprite->data7) / 80;
+        sprite->pos2.y = Sin((u8)(sprite->data6), sprite->data5) / 4;
+        sprite->pos2.x = Cos((u8)(sprite->data6), sprite->data5);
+        sprite->data6 += 4;
+        if (sprite->data7 & 1)
+            sprite->data5--;
+        sprite->data7++;
+        if (sprite->pos2.y > 0)
+            sprite->subpriority = 1;
+        else
+            sprite->subpriority = 20;
+        matrixNum = sprite->data5 / 4 + 20;
+        if (matrixNum > 31)
+            matrixNum = 31;
+        sprite->oam.matrixNum = matrixNum;
+    }
+    else
+        DestroySprite(sprite);
+}
+
+static void CreatePreEvoSparkleSet1(u8 arg0)
+{
+    u8 spriteID = CreateSprite(&sEvoSparkleSpriteTemplate, 120, 88, 0);
+    if (spriteID != MAX_SPRITES)
+    {
+        gSprites[spriteID].data5 = 48;
+        gSprites[spriteID].data6 = arg0;
+        gSprites[spriteID].data7 = 0;
+        gSprites[spriteID].oam.affineMode = 1;
+        gSprites[spriteID].oam.matrixNum = 31;
+        gSprites[spriteID].callback = SpriteCB_PreEvoSparkleSet1;
+    }
+}
+
+static void SpriteCB_PreEvoSparkleSet2(struct Sprite* sprite)
+{
+    if (sprite->pos1.y < 88)
+    {
+        sprite->pos1.y = 8 + (sprite->data7 * sprite->data7) / 5;
+        sprite->pos2.y = Sin((u8)(sprite->data6), sprite->data5) / 4;
+        sprite->pos2.x = Cos((u8)(sprite->data6), sprite->data5);
+        sprite->data5 = 8 + Sin((u8)(sprite->data7 * 4), 40);
+        sprite->data7++;
+    }
+    else
+        DestroySprite(sprite);
+}
+
+static void CreatePreEvoSparkleSet2(u8 arg0)
+{
+    u8 spriteID = CreateSprite(&sEvoSparkleSpriteTemplate, 120, 8, 0);
+    if (spriteID != MAX_SPRITES)
+    {
+        gSprites[spriteID].data5 = 8;
+        gSprites[spriteID].data6 = arg0;
+        gSprites[spriteID].data7 = 0;
+        gSprites[spriteID].oam.affineMode = 1;
+        gSprites[spriteID].oam.matrixNum = 25;
+        gSprites[spriteID].subpriority = 1;
+        gSprites[spriteID].callback = SpriteCB_PreEvoSparkleSet2;
+    }
+}
+
+static void SpriteCB_PostEvoSparkleSet1(struct Sprite* sprite)
+{
+    if (sprite->data5 > 8)
+    {
+        sprite->pos2.y = Sin((u8)(sprite->data6), sprite->data5);
+        sprite->pos2.x = Cos((u8)(sprite->data6), sprite->data5);
+        sprite->data5 -= sprite->data3;
+        sprite->data6 += 4;
+    }
+    else
+        DestroySprite(sprite);
+}
+
+static void CreatePostEvoSparkleSet1(u8 arg0, u8 arg1)
+{
+    u8 spriteID = CreateSprite(&sEvoSparkleSpriteTemplate, 120, 56, 0);
+    if (spriteID != MAX_SPRITES)
+    {
+        gSprites[spriteID].data3 = arg1;
+        gSprites[spriteID].data5 = 120;
+        gSprites[spriteID].data6 = arg0;
+        gSprites[spriteID].data7 = 0;
+        gSprites[spriteID].oam.affineMode = 1;
+        gSprites[spriteID].oam.matrixNum = 31;
+        gSprites[spriteID].subpriority = 1;
+        gSprites[spriteID].callback = SpriteCB_PostEvoSparkleSet1;
+    }
+}
+
+static void SpriteCB_PostEvoSparkleSet2(struct Sprite* sprite)
+{
+    if (!(sprite->data7 & 3))
+        sprite->pos1.y++;
+    if (sprite->data6 < 128)
+    {
+        u8 matrixNum;
+
+        sprite->pos2.y = -Sin((u8)(sprite->data6), sprite->data5);
+        sprite->pos1.x = 120 + (sprite->data3 * sprite->data7) / 3;
+        sprite->data6++;
+        matrixNum = 31 - (sprite->data6 * 12 / 128);
+        if (sprite->data6 > 64)
+            sprite->subpriority = 1;
+        else
+        {
+            sprite->invisible = 0;
+            sprite->subpriority = 20;
+            if (sprite->data6 > 112 && sprite->data6 & 1)
+                sprite->invisible = 1;
+        }
+        if (matrixNum < 20)
+            matrixNum = 20;
+        sprite->oam.matrixNum = matrixNum;
+        sprite->data7++;
+    }
+    else
+        DestroySprite(sprite);
+}
+
+static void CreatePostEvoSparkleSet2(u8 arg0)
+{
+    u8 spriteID = CreateSprite(&sEvoSparkleSpriteTemplate, 120, 56, 0);
+    if (spriteID != MAX_SPRITES)
+    {
+        gSprites[spriteID].data3 = 3 - (Random() % 7);
+        gSprites[spriteID].data5 = 48 + (Random() & 0x3F);
+        gSprites[spriteID].data7 = 0;
+        gSprites[spriteID].oam.affineMode = 1;
+        gSprites[spriteID].oam.matrixNum = 31;
+        gSprites[spriteID].subpriority = 20;
+        gSprites[spriteID].callback = SpriteCB_PostEvoSparkleSet2;
+    }
+}
+
+void LoadEvoSparkleSpriteAndPal(void)
+{
+    LoadCompressedObjectPicUsingHeap(&sEvoSparkleSpriteSheets[0]);
+    LoadSpritePalettes(sEvoSparkleSpritePals);
+}
+
+#define tFrameCounter   data[15]
+
+u8 LaunchTask_PreEvoSparklesSet1(u16 arg0)
+{
+    u8 taskID = CreateTask(EvoTask_BeginPreSet1_FadeAndPlaySE, 0);
+    gTasks[taskID].data[1] = arg0;
+    return taskID;
+}
+
+static void EvoTask_BeginPreSet1_FadeAndPlaySE(u8 taskID)
+{
+    SetEvoSparklesMatrices();
+    gTasks[taskID].tFrameCounter = 0;
+    BeginNormalPaletteFade(3 << gTasks[taskID].data[1], 0xA, 0, 0x10, 0x7FFF);
+    gTasks[taskID].func = EvoTask_CreatePreEvoSparkleSet1;
+    PlaySE(SE_W025);
+}
+
+static void EvoTask_CreatePreEvoSparkleSet1(u8 taskID)
+{
+    if (gTasks[taskID].tFrameCounter < 64)
+    {
+        if (!(gTasks[taskID].tFrameCounter & 7))
+        {
+            u8 i;
+            for (i = 0; i < 4; i++)
+                CreatePreEvoSparkleSet1((0x78 & gTasks[taskID].tFrameCounter) * 2 + i * 64);
+        }
+        gTasks[taskID].tFrameCounter++;
+    }
+    else
+    {
+        gTasks[taskID].tFrameCounter = 96;
+        gTasks[taskID].func = EvoTask_WaitForPre1SparklesToGoUp;
+    }
+}
+
+static void EvoTask_WaitForPre1SparklesToGoUp(u8 taskID)
+{
+    if (gTasks[taskID].tFrameCounter != 0)
+        gTasks[taskID].tFrameCounter--;
+    else
+        DestroyTask(taskID);
+}
+
+u8 LaunchTask_PreEvoSparklesSet2(void)
+{
+    return CreateTask(EvoTask_BeginPreSparklesSet2, 0);
+}
+
+static void EvoTask_BeginPreSparklesSet2(u8 taskID)
+{
+    SetEvoSparklesMatrices();
+    gTasks[taskID].tFrameCounter = 0;
+    gTasks[taskID].func = EvoTask_CreatePreEvoSparklesSet2;
+    PlaySE(SE_W062B);
+}
+
+static void EvoTask_CreatePreEvoSparklesSet2(u8 taskID)
+{
+    if (gTasks[taskID].tFrameCounter < 96)
+    {
+        if (gTasks[taskID].tFrameCounter < 6)
+        {
+            u8 i;
+            for (i = 0; i < 9; i++)
+                CreatePreEvoSparkleSet2(i * 16);
+        }
+        gTasks[taskID].tFrameCounter++;
+    }
+    else
+        gTasks[taskID].func = EvoTask_DestroyPreSet2Task;
+}
+
+static void EvoTask_DestroyPreSet2Task(u8 taskID)
+{
+    DestroyTask(taskID);
+}
+
+u8 LaunchTask_PostEvoSparklesSet1(void)
+{
+    return CreateTask(EvoTask_BeginPostSparklesSet1, 0);
+}
+
+static void EvoTask_BeginPostSparklesSet1(u8 taskID)
+{
+    SetEvoSparklesMatrices();
+    gTasks[taskID].tFrameCounter = 0;
+    gTasks[taskID].func = EvoTask_CreatePostEvoSparklesSet1;
+    PlaySE(SE_REAPOKE);
+}
+
+static void EvoTask_CreatePostEvoSparklesSet1(u8 taskID)
+{
+    if (gTasks[taskID].tFrameCounter < 48)
+    {
+        if (gTasks[taskID].tFrameCounter == 0)
+        {
+            u8 i;
+            for (i = 0; i < 16; i++)
+                CreatePostEvoSparkleSet1(i * 16, 4);
+        }
+        if (gTasks[taskID].tFrameCounter == 32)
+        {
+            u8 i;
+            for (i = 0; i < 16; i++)
+                CreatePostEvoSparkleSet1(i * 16, 8);
+        }
+        gTasks[taskID].tFrameCounter++;
+    }
+    else
+        gTasks[taskID].func = EvoTask_DestroyPostSet1Task;
+}
+
+static void EvoTask_DestroyPostSet1Task(u8 taskID)
+{
+    DestroyTask(taskID);
+}
+
+u8 LaunchTask_PostEvoSparklesSet2AndFlash(u16 species)
+{
+    u8 taskID = CreateTask(EvoTask_BeginPostSparklesSet2_AndFlash, 0);
+    gTasks[taskID].data[2] = species;
+    return taskID;
+}
+
+static void EvoTask_BeginPostSparklesSet2_AndFlash(u8 taskID)
+{
+    SetEvoSparklesMatrices();
+    gTasks[taskID].tFrameCounter = 0;
+    CpuSet(&gPlttBufferFaded[0x20], &gPlttBufferUnfaded[0x20], 0x30);
+    BeginNormalPaletteFade(0xFFF9041C, 0, 0, 0x10, 0x7FFF); // was 0xFFF9001C in R/S
+    gTasks[taskID].func = EvoTask_CreatePostEvoSparklesSet2_AndFlash;
+    PlaySE(SE_W080);
+}
+
+static void EvoTask_CreatePostEvoSparklesSet2_AndFlash(u8 taskID)
+{
+    if (gTasks[taskID].tFrameCounter < 128)
+    {
+        u8 i;
+        switch (gTasks[taskID].tFrameCounter)
+        {
+        default:
+            if (gTasks[taskID].tFrameCounter < 50)
+                CreatePostEvoSparkleSet2(Random() & 7);
+            break;
+        case 0:
+            for (i = 0; i < 8; i++)
+                CreatePostEvoSparkleSet2(i);
+            break;
+        case 32:
+            BeginNormalPaletteFade(0xFFFF041C, 0x10, 0x10, 0, 0x7FFF); // was 0xFFF9001C in R/S
+            break;
+        }
+        gTasks[taskID].tFrameCounter++;
+    }
+    else
+        gTasks[taskID].func = EvoTask_DestroyPostSet2AndFlashTask;
+}
+
+static void EvoTask_DestroyPostSet2AndFlashTask(u8 taskID)
+{
+    if (!gPaletteFade.active)
+        DestroyTask(taskID);
+}
+
+u8 LaunchTask_PostEvoSparklesSet2AndFlash_Trade(u16 species)
+{
+    u8 taskID = CreateTask(EvoTask_BeginPostSparklesSet2_AndFlash_Trade, 0);
+    gTasks[taskID].data[2] = species;
+    return taskID;
+}
+
+static void EvoTask_BeginPostSparklesSet2_AndFlash_Trade(u8 taskID)
+{
+    SetEvoSparklesMatrices();
+    gTasks[taskID].tFrameCounter = 0;
+    CpuSet(&gPlttBufferFaded[0x20], &gPlttBufferUnfaded[0x20], 0x30);
+    BeginNormalPaletteFade(0xFFF90400, 0, 0, 0x10, 0x7FFF); // was 0xFFFF0001 in R/S
+    gTasks[taskID].func = EvoTask_CreatePostEvoSparklesSet2_AndFlash_Trade;
+    PlaySE(SE_W080);
+}
+
+static void EvoTask_CreatePostEvoSparklesSet2_AndFlash_Trade(u8 taskID)
+{
+    if (gTasks[taskID].tFrameCounter < 128)
+    {
+        u8 i;
+        switch (gTasks[taskID].tFrameCounter)
+        {
+        default:
+            if (gTasks[taskID].tFrameCounter < 50)
+                CreatePostEvoSparkleSet2(Random() & 7);
+            break;
+        case 0:
+            for (i = 0; i < 8; i++)
+                CreatePostEvoSparkleSet2(i);
+            break;
+        case 32:
+            BeginNormalPaletteFade(0xFFFF0400, 0x10, 0x10, 0, 0x7FFF); // was 0xFFFF0001 in R/S
+            break;
+        }
+        gTasks[taskID].tFrameCounter++;
+    }
+    else
+        gTasks[taskID].func = EvoTask_DestroyPostSet2AndFlashTask;
+}
+
+#undef tFrameCounter
+
+static void PokeEvoSprite_DummySpriteCB(struct Sprite* sprite)
+{
+
+}
+
+#define tPreEvoSpriteID     data[1]
+#define tPostEvoSpriteID    data[2]
+#define tEvoStopped         data[8]
+
+u8 sub_817C3A0(u8 preEvoSpriteID, u8 postEvoSpriteID)
+{
+    u16 i;
+    u16 stack[16];
+    u8 taskID;
+    s32 toDiv;
+
+    for (i = 0; i < 16; i++)
+        stack[i] = 0x7FFF;
+
+    taskID = CreateTask(sub_817C4EC, 0);
+    gTasks[taskID].tPreEvoSpriteID = preEvoSpriteID;
+    gTasks[taskID].tPostEvoSpriteID = postEvoSpriteID;
+    gTasks[taskID].data[3] = 256;
+    gTasks[taskID].data[4] = 16;
+
+    toDiv = 65536;
+    SetOamMatrix(30, 256, 0, 0, 256);
+    SetOamMatrix(31, toDiv / gTasks[taskID].data[4], 0, 0, toDiv / gTasks[taskID].data[4]);
+
+    gSprites[preEvoSpriteID].callback = PokeEvoSprite_DummySpriteCB;
+    gSprites[preEvoSpriteID].oam.affineMode = 1;
+    gSprites[preEvoSpriteID].oam.matrixNum = 30;
+    gSprites[preEvoSpriteID].invisible = 0;
+    CpuSet(stack, &gPlttBufferFaded[0x100 + (gSprites[preEvoSpriteID].oam.paletteNum * 16)], 16);
+
+    gSprites[postEvoSpriteID].callback = PokeEvoSprite_DummySpriteCB;
+    gSprites[postEvoSpriteID].oam.affineMode = 1;
+    gSprites[postEvoSpriteID].oam.matrixNum = 31;
+    gSprites[postEvoSpriteID].invisible = 0;
+    CpuSet(stack, &gPlttBufferFaded[0x100 + (gSprites[postEvoSpriteID].oam.paletteNum * 16)], 16);
+
+    gTasks[taskID].tEvoStopped = FALSE;
+    return taskID;
+}
+
+static void sub_817C4EC(u8 taskID)
+{
+    gTasks[taskID].data[5] = 0;
+    gTasks[taskID].data[6] = 8;
+    gTasks[taskID].func = sub_817C510;
+}
+
+static void sub_817C510(u8 taskID)
+{
+    if (gTasks[taskID].tEvoStopped)
+        PreEvoVisible_PostEvoInvisible_KillTask(taskID);
+    else if (gTasks[taskID].data[6] == 128)
+        PreEvoInvisible_PostEvoVisible_KillTask(taskID);
+    else
+    {
+        gTasks[taskID].data[6] += 2;
+        gTasks[taskID].data[5] ^= 1;
+        gTasks[taskID].func = sub_817C560;
+    }
+}
+
+static void sub_817C560(u8 taskID)
+{
+    if (gTasks[taskID].tEvoStopped)
+        gTasks[taskID].func = PreEvoVisible_PostEvoInvisible_KillTask;
+    else
+    {
+        u16 oamMatrixArg;
+        u8 r6 = 0;
+        if (gTasks[taskID].data[5] == 0)
+        {
+            if (gTasks[taskID].data[3] < 256 - gTasks[taskID].data[6])
+                gTasks[taskID].data[3] += gTasks[taskID].data[6];
+            else
+            {
+                gTasks[taskID].data[3] = 256;
+                r6++;
+            }
+            if (gTasks[taskID].data[4] > 16 + gTasks[taskID].data[6])
+                gTasks[taskID].data[4]  -= gTasks[taskID].data[6];
+            else
+            {
+                gTasks[taskID].data[4] = 16;
+                r6++;
+            }
+        }
+        else
+        {
+            if (gTasks[taskID].data[4] < 256 - gTasks[taskID].data[6])
+                gTasks[taskID].data[4] += gTasks[taskID].data[6];
+            else
+            {
+                gTasks[taskID].data[4] = 256;
+                r6++;
+            }
+            if (gTasks[taskID].data[3] > 16 + gTasks[taskID].data[6])
+                gTasks[taskID].data[3]  -= gTasks[taskID].data[6];
+            else
+            {
+                gTasks[taskID].data[3] = 16;
+                r6++;
+            }
+        }
+        oamMatrixArg = 65536 / gTasks[taskID].data[3];
+        SetOamMatrix(30, oamMatrixArg, 0, 0, oamMatrixArg);
+
+        oamMatrixArg = 65536 / gTasks[taskID].data[4];
+        SetOamMatrix(31, oamMatrixArg, 0, 0, oamMatrixArg);
+        if (r6 == 2)
+            gTasks[taskID].func = sub_817C510;
+    }
+}
+
+static void PreEvoInvisible_PostEvoVisible_KillTask(u8 taskID)
+{
+    gSprites[gTasks[taskID].tPreEvoSpriteID].oam.affineMode = 0;
+    gSprites[gTasks[taskID].tPreEvoSpriteID].oam.matrixNum = 0;
+    gSprites[gTasks[taskID].tPreEvoSpriteID].invisible = 1;
+
+    gSprites[gTasks[taskID].tPostEvoSpriteID].oam.affineMode = 0;
+    gSprites[gTasks[taskID].tPostEvoSpriteID].oam.matrixNum = 0;
+    gSprites[gTasks[taskID].tPostEvoSpriteID].invisible = 0;
+
+    DestroyTask(taskID);
+}
+
+static void PreEvoVisible_PostEvoInvisible_KillTask(u8 taskID)
+{
+    gSprites[gTasks[taskID].tPreEvoSpriteID].oam.affineMode = 0;
+    gSprites[gTasks[taskID].tPreEvoSpriteID].oam.matrixNum = 0;
+    gSprites[gTasks[taskID].tPreEvoSpriteID].invisible = 0;
+
+    gSprites[gTasks[taskID].tPostEvoSpriteID].oam.affineMode = 0;
+    gSprites[gTasks[taskID].tPostEvoSpriteID].oam.matrixNum = 0;
+    gSprites[gTasks[taskID].tPostEvoSpriteID].invisible = 1;
+
+    DestroyTask(taskID);
+}