Merge pull request #216 from KDSKardabox/master

Decompile Ground Shake, Fossil Special & Flash

6 files changed, 1453 insertions, 14 deletions

diff --git a/src/fldeff_flash.c b/src/fldeff_flash.c
new file mode 100644
index 000000000..4f3a091ce
--- /dev/null
+++ b/src/fldeff_flash.c
@@ -0,0 +1,367 @@
+#include "global.h"
+#include "constants/songs.h"
+#include "braille_puzzles.h"
+#include "event_data.h"
+#include "event_scripts.h"
+#include "field_effect.h"
+#include "gpu_regs.h"
+#include "gba/io_reg.h"
+#include "main.h"
+#include "palette.h"
+#include "party_menu.h"
+#include "overworld.h"
+#include "rom6.h"
+#include "script.h"
+#include "sound.h"
+#include "sprite.h"
+#include "task.h"
+
+// structures
+struct FlashStruct
+{
+    u8 unk0;
+    u8 unk1;
+    bool8 unk2;
+    bool8 unk3;
+    void (*func)(void);
+};
+
+// static functions
+static void hm2_flash(void);
+static void sub_81371B4(void);
+static bool8 sub_8137304(void);
+static void sub_81373F0(void);
+static void sub_8137404(u8 taskId);
+static void sub_8137420(u8 taskId);
+static void sub_81374C4(u8 taskId);
+static void sub_813750C(u8 taskId);
+static void sub_8137574(u8 taskId);
+static void sub_81375A8(void);
+static void sub_81375BC(u8 taskId);
+static void sub_81375D8(u8 taskId);
+static void sub_8137678(u8 taskId);
+static void sub_81376DC(u8 taskId);
+
+// rodata
+static const struct FlashStruct gUnknown_085B27C8[] =
+{
+    {1, 4, 1, 0, sub_81375A8},
+    {2, 4, 1, 0, sub_81375A8},
+    {3, 4, 1, 0, sub_81375A8},
+    {5, 4, 1, 0, sub_81375A8},
+    {6, 4, 1, 0, sub_81375A8},
+    {7, 4, 1, 0, sub_81375A8},
+    {8, 4, 1, 0, sub_81375A8},
+    {9, 4, 1, 0, sub_81375A8},
+    {4, 1, 0, 1, sub_81373F0},
+    {4, 2, 0, 1, sub_81373F0},
+    {4, 3, 0, 1, sub_81373F0},
+    {4, 5, 0, 1, sub_81373F0},
+    {4, 6, 0, 1, sub_81373F0},
+    {4, 7, 0, 1, sub_81373F0},
+    {4, 8, 0, 1, sub_81373F0},
+    {4, 9, 0, 1, sub_81373F0},
+    {0, 0, 0, 0, NULL},
+};
+
+static const u16 gCaveTransitionPalette_White[] = INCBIN_U16("graphics/misc/cave_transition_white.gbapal");
+static const u16 gCaveTransitionPalette_Black[] = INCBIN_U16("graphics/misc/cave_transition_black.gbapal");
+
+static const u16 gUnknown_085B2890[] = INCBIN_U16("graphics/misc/85B2890.gbapal");
+static const u16 gUnknown_085B28A0[] = INCBIN_U16("graphics/misc/85B28A0.gbapal");
+static const u16 gCaveTransitionTilemap[] = INCBIN_U16("graphics/misc/cave_transition_map.bin.lz");
+static const u8 gCaveTransitionTiles[] = INCBIN_U8("graphics/misc/cave_transition.4bpp.lz");
+
+// text
+bool8 SetUpFieldMove_Flash(void)
+{
+    if (ShouldDoBrailleFlyEffect())
+    {
+        gSpecialVar_Result = GetCursorSelectionMonId();
+        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gUnknown_0203CEEC = sub_8179918;
+        return TRUE;
+    }
+    else if (gMapHeader.cave == TRUE && !FlagGet(FLAG_SYS_USE_FLASH))
+    {
+        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gUnknown_0203CEEC = hm2_flash;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+static void hm2_flash(void)
+{
+    u8 taskId = oei_task_add();
+    gFieldEffectArguments[0] = GetCursorSelectionMonId();
+    gTasks[taskId].data[8] = (uintptr_t)sub_81371B4 >> 16;
+    gTasks[taskId].data[9] = (uintptr_t)sub_81371B4;
+}
+
+static void sub_81371B4(void)
+{
+    PlaySE(SE_W115);
+    FlagSet(FLAG_SYS_USE_FLASH);
+    ScriptContext1_SetupScript(EventScript_2926F8);
+}
+
+static void sub_81371D4(void)
+{
+    RunTasks();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+}
+
+static void sub_81371EC(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+}
+
+void c2_change_map(void)
+{
+    u16 ime;
+
+    SetVBlankCallback(NULL);
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    SetGpuReg(REG_OFFSET_BG2CNT, 0);
+    SetGpuReg(REG_OFFSET_BG1CNT, 0);
+    SetGpuReg(REG_OFFSET_BG0CNT, 0);
+    SetGpuReg(REG_OFFSET_BG2HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG2VOFS, 0);
+    SetGpuReg(REG_OFFSET_BG1HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG1VOFS, 0);
+    SetGpuReg(REG_OFFSET_BG0HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG0VOFS, 0);
+    DmaFill16(3, 0, (void *)VRAM, VRAM_SIZE);
+    DmaFill32(3, 0, (void *)OAM, OAM_SIZE);
+    DmaFill16(3, 0, (void *)(PLTT + 2), PLTT_SIZE - 2);
+    ResetPaletteFade();
+    ResetTasks();
+    ResetSpriteData();
+    ime = REG_IME;
+    REG_IME = 0;
+    REG_IE |= INTR_FLAG_VBLANK;
+    REG_IME = ime;
+    SetVBlankCallback(sub_81371EC);
+    SetMainCallback2(sub_81371D4);
+    if (!sub_8137304())
+        SetMainCallback2(gMain.savedCallback);
+}
+
+static bool8 sub_8137304(void)
+{
+    u8 i;
+    u8 v0 = get_map_light_from_warp0();
+    u8 v1 = Overworld_GetMapTypeOfSaveblockLocation();
+
+    for (i = 0; gUnknown_085B27C8[i].unk0; i++)
+    {
+        if (gUnknown_085B27C8[i].unk0 == v0 && gUnknown_085B27C8[i].unk1 == v1)
+        {
+            gUnknown_085B27C8[i].func();
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+bool8 sub_8137360(u8 a1, u8 a2)
+{
+    u8 i;
+    u8 v0 = a1;
+    u8 v1 = a2;
+
+    for (i = 0; gUnknown_085B27C8[i].unk0; i++)
+    {
+        if (gUnknown_085B27C8[i].unk0 == v0 && gUnknown_085B27C8[i].unk1 == v1)
+        {
+            return gUnknown_085B27C8[i].unk2;
+        }
+    }
+
+    return FALSE;
+}
+
+bool8 fade_type_for_given_maplight_pair(u8 a1, u8 a2)
+{
+    u8 i;
+    u8 v0 = a1;
+    u8 v1 = a2;
+
+    for (i = 0; gUnknown_085B27C8[i].unk0; i++)
+    {
+        if (gUnknown_085B27C8[i].unk0 == v0 && gUnknown_085B27C8[i].unk1 == v1)
+        {
+            return gUnknown_085B27C8[i].unk3;
+        }
+    }
+
+    return FALSE;
+}
+
+static void sub_81373F0(void)
+{
+    CreateTask(sub_8137404, 0);
+}
+
+static void sub_8137404(u8 taskId)
+{
+    gTasks[taskId].func = sub_8137420;
+}
+
+static void sub_8137420(u8 taskId)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
+    LZ77UnCompVram(gCaveTransitionTilemap, (void *)0x600F800);
+    LoadPalette(gCaveTransitionPalette_White, 0xE0, 0x20);
+    LoadPalette(gUnknown_085B28A0, 0xE0, 0x10);
+    SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG0
+                                | BLDCNT_EFFECT_BLEND
+                                | BLDCNT_TGT2_BG1
+                                | BLDCNT_TGT2_BG2
+                                | BLDCNT_TGT2_BG3
+                                | BLDCNT_TGT2_OBJ
+                                | BLDCNT_TGT2_BD);
+    SetGpuReg(REG_OFFSET_BLDALPHA, 0);
+    SetGpuReg(REG_OFFSET_BLDY, 0);
+    SetGpuReg(REG_OFFSET_BG0CNT, BGCNT_PRIORITY(0)
+                               | BGCNT_CHARBASE(3)
+                               | BGCNT_SCREENBASE(31)
+                               | BGCNT_16COLOR
+                               | BGCNT_TXT256x256);
+    SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_MODE_0
+                                | DISPCNT_OBJ_1D_MAP
+                                | DISPCNT_BG0_ON
+                                | DISPCNT_OBJ_ON);
+    gTasks[taskId].func = sub_81374C4;
+    gTasks[taskId].data[0] = 16;
+    gTasks[taskId].data[1] = 0;
+}
+
+static void sub_81374C4(u8 taskId)
+{
+    u16 count = gTasks[taskId].data[1];
+    u16 blend = count + 0x1000;
+
+    SetGpuReg(REG_OFFSET_BLDALPHA, blend);
+    if (count <= 0x10)
+    {
+        gTasks[taskId].data[1]++;
+    }
+    else
+    {
+        gTasks[taskId].data[2] = 0;
+        gTasks[taskId].func = sub_813750C;
+    }
+}
+
+static void sub_813750C(u8 taskId)
+{
+    u16 count;
+
+    SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(16, 16));
+    count = gTasks[taskId].data[2];
+
+    if (count < 8)
+    {
+        gTasks[taskId].data[2]++;
+        LoadPalette(&gUnknown_085B28A0[count], 0xE0, 16 - 2 * count);
+    }
+    else
+    {
+        LoadPalette(gCaveTransitionPalette_White, 0, 0x20);
+        gTasks[taskId].func = sub_8137574;
+        gTasks[taskId].data[2] = 8;
+    }
+}
+
+static void sub_8137574(u8 taskId)
+{
+    if (gTasks[taskId].data[2])
+        gTasks[taskId].data[2]--;
+    else
+        SetMainCallback2(gMain.savedCallback);
+}
+
+static void sub_81375A8(void)
+{
+    CreateTask(sub_81375BC, 0);
+}
+
+static void sub_81375BC(u8 taskId)
+{
+    gTasks[taskId].func = sub_81375D8;
+}
+
+static void sub_81375D8(u8 taskId)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
+    LZ77UnCompVram(gCaveTransitionTilemap, (void *)0x600F800);
+    SetGpuReg(REG_OFFSET_BLDCNT, 0);
+    SetGpuReg(REG_OFFSET_BLDALPHA, 0);
+    SetGpuReg(REG_OFFSET_BLDY, 0);
+    SetGpuReg(REG_OFFSET_BG0CNT, BGCNT_PRIORITY(0)
+                               | BGCNT_CHARBASE(3)
+                               | BGCNT_SCREENBASE(31)
+                               | BGCNT_16COLOR
+                               | BGCNT_TXT256x256);
+    SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_MODE_0
+                                | DISPCNT_OBJ_1D_MAP
+                                | DISPCNT_BG0_ON
+                                | DISPCNT_OBJ_ON);
+    LoadPalette(gCaveTransitionPalette_White, 0xE0, 0x20);
+    LoadPalette(gCaveTransitionPalette_Black, 0, 0x20);
+    gTasks[taskId].func = sub_8137678;
+    gTasks[taskId].data[0] = 16;
+    gTasks[taskId].data[1] = 0;
+    gTasks[taskId].data[2] = 0;
+}
+
+static void sub_8137678(u8 taskId)
+{
+    u16 count = gTasks[taskId].data[2];
+
+    if (count < 16)
+    {
+        gTasks[taskId].data[2]++;
+        gTasks[taskId].data[2]++;
+        LoadPalette(&gUnknown_085B2890[15 - count], 0xE0, 2 * (count + 1));
+    }
+    else
+    {
+        SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(16, 16));
+        SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG0
+                                    | BLDCNT_EFFECT_BLEND
+                                    | BLDCNT_TGT2_BG1
+                                    | BLDCNT_TGT2_BG2
+                                    | BLDCNT_TGT2_BG3
+                                    | BLDCNT_TGT2_OBJ
+                                    | BLDCNT_TGT2_BD);
+        gTasks[taskId].func = sub_81376DC;
+    }
+}
+
+static void sub_81376DC(u8 taskId)
+{
+    u16 count = 16 - gTasks[taskId].data[1];
+    u16 blend = count + 0x1000;
+
+    SetGpuReg(REG_OFFSET_BLDALPHA, blend);
+    if (count)
+    {
+        gTasks[taskId].data[1]++;
+    }
+    else
+    {
+        LoadPalette(gCaveTransitionPalette_Black, 0, 0x20);
+        SetMainCallback2(gMain.savedCallback);
+    }
+}
diff --git a/src/fldeff_groundshake.c b/src/fldeff_groundshake.c
new file mode 100644
index 000000000..bee4d2c4b
--- /dev/null
+++ b/src/fldeff_groundshake.c
@@ -0,0 +1,299 @@
+#include "global.h"
+#include "global.fieldmap.h"
+#include "constants/flags.h"
+#include "constants/songs.h"
+#include "event_data.h"
+#include "field_camera.h"
+#include "field_map_obj.h"
+#include "malloc.h"
+#include "random.h"
+#include "roulette_util.h"
+#include "script.h"
+#include "sound.h"
+#include "sprite.h"
+#include "task.h"
+
+// structures
+struct Struct203CF18 {
+    u8 taskId;
+    struct InnerStruct203CF18 unk4;
+}; //size = 0xC8
+
+// extern data
+extern const struct SpriteSheet gUnknown_08617D94[];
+extern const s16 gUnknown_08617D64[][3];
+
+// static functions
+static void sub_81BE808(u8 taskId);
+static void sub_81BE900(u8 taskId);
+static void sub_81BE968(void);
+static void sub_81BE9C0(u8 taskId);
+static void sub_81BEA00(u8 taskId);
+static void sub_81BEA20(void);
+static void sub_81BEAD8(struct Sprite* sprite);
+
+// rodata
+static const u8 gUnknown_08617E18[] = {0x3b, 0x43, 0x61, 0x00, 0x0f, 0x05, 0xff, 0x9b};
+
+static const union AnimCmd gSpriteAnim_8617E20[] =
+{
+    ANIMCMD_FRAME(0, 12),
+    ANIMCMD_JUMP(0),
+};
+
+static const union AnimCmd *const gSpriteAnimTable_8617E28[] =
+{
+    gSpriteAnim_8617E20,
+};
+
+static const struct OamData gUnknown_08617E2C =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 0,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 0,
+    .tileNum = 0,
+    .priority = 0,
+    .paletteNum = 0,
+    .affineParam = 0,
+};
+
+static const struct SpriteTemplate gUnknown_08617E34 = {
+    0x0FA0, 0xFFFF, &gUnknown_08617E2C, gSpriteAnimTable_8617E28, NULL, gDummySpriteAffineAnimTable, sub_81BEAD8
+};
+
+static const union AnimCmd gSpriteAnim_8617E4C[] =
+{
+    ANIMCMD_FRAME(0, 12),
+    ANIMCMD_JUMP(0),
+};
+
+static const union AnimCmd *const gSpriteAnim_8617E54[] =
+{
+    gSpriteAnim_8617E4C,
+};
+
+static const struct OamData gSpriteAnim_8617E58 =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 0,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 1,
+    .tileNum = 0,
+    .priority = 0,
+    .paletteNum = 0,
+    .affineParam = 0,
+};
+
+static const struct SpriteTemplate gUnknown_08617E60 = {
+    0x0FA0, 0xFFFF, &gSpriteAnim_8617E58, gSpriteAnim_8617E54, NULL, gDummySpriteAffineAnimTable, sub_81BEAD8
+};
+
+// ewram
+EWRAM_DATA struct Struct203CF18 *gUnknown_0203CF18 = NULL;
+
+// text
+bool8 sub_81BE66C(void)
+{
+    if (!(gSaveBlock1Ptr->location.mapGroup == 0x0 && gSaveBlock1Ptr->location.mapNum == 0x1A))
+        return 0;
+    return FlagGet(FLAG_0x14E);
+}
+
+void sub_81BE698(u8 taskId)
+{
+    sub_8151E50(&(gUnknown_0203CF18->unk4));
+}
+
+void sub_81BE6AC(void)
+{
+    gUnknown_0203CF18 = NULL;
+}
+
+void sub_81BE6B8(void)
+{
+    if(gUnknown_0203CF18 != NULL)
+    {
+        gUnknown_0203CF18 = NULL;
+        return;
+    }
+    if(!(gSaveBlock1Ptr->location.mapGroup == 0x0 && gSaveBlock1Ptr->location.mapNum == 0x1A) || !FlagGet(FLAG_0x14E))
+        return;
+
+    gUnknown_0203CF18 = (struct Struct203CF18 *)AllocZeroed(sizeof(struct Struct203CF18));
+    sub_8151B3C(&(gUnknown_0203CF18->unk4));
+    sub_8151B68(&(gUnknown_0203CF18->unk4), gUnknown_08617E18);
+    sub_8151CA8(&(gUnknown_0203CF18->unk4), 1, 1);
+    gUnknown_0203CF18->taskId = CreateTask(sub_81BE698, 0xFF);
+}
+
+void sub_81BE72C(void)
+{
+    if(!(gSaveBlock1Ptr->location.mapGroup == 0x0 && gSaveBlock1Ptr->location.mapNum == 0x1A) || !FlagGet(FLAG_0x14E) || gUnknown_0203CF18 == NULL)
+        return;
+    if(FuncIsActiveTask(sub_81BE698))
+        DestroyTask(gUnknown_0203CF18->taskId);
+    sub_8151D28(&(gUnknown_0203CF18->unk4), 1, 1);
+    sub_8151C50(&(gUnknown_0203CF18->unk4), 1, 1);
+    Free(gUnknown_0203CF18);
+    gUnknown_0203CF18 = NULL;
+}
+
+void sub_81BE79C(void)
+{
+    u16 rand;
+    bool8 chance;
+
+    if(VarGet(VAR_0x40CB) != 0)
+    {
+        FlagClear(FLAG_0x14E);
+        return;
+    }
+    rand = Random();
+    chance = rand & 1;
+    if(FlagGet(FLAG_0x09D) == TRUE)
+        chance = TRUE;
+    if(chance)
+    {
+        FlagSet(FLAG_0x14E);
+        sub_81BE6B8();
+        return;
+    }
+    FlagClear(FLAG_0x14E);
+}
+
+void sub_81BE7F4(void)
+{
+    CreateTask(sub_81BE808, 0x8);
+}
+
+static void sub_81BE808(u8 taskId)
+{
+    u8 mapObjectIdBuffer;
+    struct MapObject *fieldMapObject;
+    struct MapObject *playerAvatarMapObject;
+
+    TryGetFieldObjectIdByLocalIdAndMap(0x2D, gSaveBlock1Ptr->location.mapNum, gSaveBlock1Ptr->location.mapGroup, &mapObjectIdBuffer);
+    fieldMapObject = &(gMapObjects[mapObjectIdBuffer]);
+    gSprites[fieldMapObject->spriteId].pos2.y += 4;
+    playerAvatarMapObject = &(gMapObjects[gPlayerAvatar.mapObjectId]);
+
+    if((gSprites[fieldMapObject->spriteId].pos1.y + gSprites[fieldMapObject->spriteId].pos2.y) >=
+       (gSprites[playerAvatarMapObject->spriteId].pos1.y + gSprites[playerAvatarMapObject->spriteId].pos2.y))
+    {
+        DestroyTask(taskId);
+        EnableBothScriptContexts();
+    }
+}
+
+static void sp136_strengh_sound(u8 a, u8 b, u8 c, u8 d)
+{
+    u8 taskId;
+
+    taskId = CreateTask(sub_81BE900, 0x9);
+    gTasks[taskId].data[0] = b;
+    gTasks[taskId].data[1] = 0;
+    gTasks[taskId].data[2] = c;
+    gTasks[taskId].data[3] = d;
+    gTasks[taskId].data[4] = a;
+    SetCameraPanningCallback(NULL);
+    PlaySE(SE_W070);
+}
+
+static void sub_81BE900(u8 taskId)
+{
+    s16 *data;
+
+    data = gTasks[taskId].data;
+    data[1]++;
+    if((data[1] % data[3]) == 0)
+    {
+        data[1] = 0;
+        data[2]--;
+        data[0] = -data[0];
+        data[4] = -data[4];
+        SetCameraPanning(data[0], data[4]);
+        if(!data[2])
+        {
+            sub_81BE968();
+            DestroyTask(taskId);
+            InstallCameraPanAheadCallback();
+        }
+    }
+}
+
+static void sub_81BE968(void)
+{
+    u8 taskId;
+
+    taskId = FindTaskIdByFunc(sub_81BE9C0);
+    if(taskId != 0xFF)
+        gTasks[taskId].data[0]++;
+}
+
+void sub_81BE994(void)
+{
+    LoadSpriteSheets(gUnknown_08617D94);
+    sub_81BEA20();
+    CreateTask(sub_81BE9C0, 0x8);
+    sp136_strengh_sound(2, 1, 16, 3);
+}
+
+static void sub_81BE9C0(u8 taskId)
+{
+    u16 *data;
+
+    data = gTasks[taskId].data;
+    data[1]++;
+    if(data[1] == 1000 || data[0] == 17)
+        gTasks[taskId].func = sub_81BEA00;
+}
+
+static void sub_81BEA00(u8 taskId)
+{
+    FreeSpriteTilesByTag(4000);
+    DestroyTask(taskId);
+    EnableBothScriptContexts();
+}
+
+static void sub_81BEA20(void)
+{
+    u8 i;
+    u8 spriteId;
+
+    for(i = 0; i < 8; i++)
+    {
+        spriteId = CreateSprite(&gUnknown_08617E60, gUnknown_08617D64[i][0] + 120, gUnknown_08617D64[i][1], 8);
+        gSprites[spriteId].oam.priority = 0;
+        gSprites[spriteId].oam.paletteNum = 0;
+        gSprites[spriteId].data[0] = i;
+    }
+    for(i = 0; i < 8; i++)
+    {
+        spriteId = CreateSprite(&gUnknown_08617E34, gUnknown_08617D64[i][0] + 115, gUnknown_08617D64[i][1] - 3, 8);
+        gSprites[spriteId].oam.priority = 0;
+        gSprites[spriteId].oam.paletteNum = 0;
+        gSprites[spriteId].data[0] = i;
+    }
+}
+
+static void sub_81BEAD8(struct Sprite* sprite)
+{
+    sprite->data[1] += 2;
+    sprite->pos2.y = (sprite->data[1] / 2);
+    if(((sprite->pos1.y) + (sprite->pos2.y)) >  gUnknown_08617D64[sprite->data[0]][2])
+    {
+        DestroySprite(sprite);
+        sub_81BE968();
+    }
+}
diff --git a/src/fldeff_softboiled.c b/src/fldeff_softboiled.c
index b61cf9f32..d0a40a9a9 100644
--- a/src/fldeff_softboiled.c
+++ b/src/fldeff_softboiled.c
@@ -9,10 +9,10 @@
 #include "strings.h"
 #include "task.h"
 
-void sub_816166C(u8 taskId);
-void sub_81617B8(u8 taskId);
-void sub_81616C0(u8 taskId);
-void sub_8161724(u8 taskId);
+static void sub_816166C(u8 taskId);
+static void sub_81616C0(u8 taskId);
+static void sub_8161724(u8 taskId);
+static void sub_81617B8(u8 taskId);
 
 bool8 SetUpFieldMove_SoftBoiled(void)
 {
@@ -63,13 +63,13 @@ void sub_81615A8(u8 taskId)
     sub_81B1F18(taskId, unk9, -1, GetMonData(&gPlayerParty[unk9], MON_DATA_MAX_HP)/5, sub_816166C);
 }
 
-void sub_816166C(u8 taskId)
+static void sub_816166C(u8 taskId)
 {
     PlaySE(SE_KAIFUKU);
     sub_81B1F18(taskId, gUnknown_0203CEC8.unkA, 1, GetMonData(&gPlayerParty[gUnknown_0203CEC8.unk9], MON_DATA_MAX_HP)/5, sub_81616C0);
 }
 
-void sub_81616C0(u8 taskId)
+static void sub_81616C0(u8 taskId)
 {
     GetMonNickname(&gPlayerParty[gUnknown_0203CEC8.unkA], gStringVar1);
     StringExpandPlaceholders(gStringVar4, gText_PkmnHPRestoredByVar2);
@@ -78,7 +78,7 @@ void sub_81616C0(u8 taskId)
     gTasks[taskId].func = sub_8161724;
 }
 
-void sub_8161724(u8 taskId)
+static void sub_8161724(u8 taskId)
 {
     if(sub_81B1BD4() == 1)
         return;
@@ -92,7 +92,7 @@ void sub_8161724(u8 taskId)
     gTasks[taskId].func = sub_81B1370;
 }
 
-void sub_8161784(u8 taskId)
+static void sub_8161784(u8 taskId)
 {
     if(sub_81B1BD4() == 1)
         return;
@@ -100,7 +100,7 @@ void sub_8161784(u8 taskId)
     gTasks[taskId].func = sub_81B1370;
 }
 
-void sub_81617B8(u8 taskId)
+static void sub_81617B8(u8 taskId)
 {
     PlaySE(SE_SELECT);
     sub_81B1B5C(&gText_CantBeUsedOnPkmn, 0);
diff --git a/src/fldeff_strength.c b/src/fldeff_strength.c
index c1965d983..162479c73 100644
--- a/src/fldeff_strength.c
+++ b/src/fldeff_strength.c
@@ -7,9 +7,11 @@
 #include "script.h"
 #include "task.h"
 
-void FldEff_UseStrength(void);
-void sub_8145E74(void);
+// static functions
+static void FldEff_UseStrength(void);
+static void sub_8145E74(void);
 
+// text
 bool8 SetUpFieldMove_Strength(void)
 {
     if (npc_before_player_of_type(87) == TRUE)
@@ -22,7 +24,7 @@ bool8 SetUpFieldMove_Strength(void)
     return FALSE;
 }
 
-void FldEff_UseStrength(void)
+static void FldEff_UseStrength(void)
 {
     gFieldEffectArguments[0] = GetCursorSelectionMonId();
     ScriptContext1_SetupScript(FieryPath_EventScript_2908FD);
@@ -37,7 +39,7 @@ bool8 sub_8145E2C(void)
     return FALSE;
 }
 
-void sub_8145E74(void)
+static void sub_8145E74(void)
 {
     FieldEffectActiveListRemove(FLDEFF_USE_STRENGTH);
     EnableBothScriptContexts();
diff --git a/src/fldeff_sweetscent.c b/src/fldeff_sweetscent.c
index 3dfcd640d..100e440a5 100644
--- a/src/fldeff_sweetscent.c
+++ b/src/fldeff_sweetscent.c
@@ -6,7 +6,6 @@
 #include "field_effect.h"
 #include "field_player_avatar.h"
 #include "field_screen.h"
-#include "fldeff_groundshake.h"
 #include "palette.h"
 #include "party_menu.h"
 #include "rom6.h"
@@ -20,6 +19,8 @@ void hm2_sweet_scent(void);
 void sub_8159F5C(void);
 void sub_8159FEC(u8 taskId);
 void sub_815A090(u8 taskId);
+void sub_81BE6B8(void);
+void sub_81BE72C(void);
 
 bool8 SetUpFieldMove_SweetScent(void)
 {
diff --git a/src/fossil_specials.c b/src/fossil_specials.c
new file mode 100644
index 000000000..95fafc17b
--- /dev/null
+++ b/src/fossil_specials.c
@@ -0,0 +1,770 @@
+#include "global.h"
+#include "constants/flags.h"
+#include "constants/songs.h"
+#include "bg.h"
+#include "event_data.h"
+#include "field_camera.h"
+#include "field_map_obj.h"
+#include "fieldmap.h"
+#include "global.fieldmap.h"
+#include "gpu_regs.h"
+#include "malloc.h"
+#include "menu.h"
+#include "random.h"
+#include "script.h"
+#include "sound.h"
+#include "sprite.h"
+#include "task.h"
+#include "window.h"
+
+#define MIRAGE_TOWER_GFX_LENGTH (sizeof(gUnknown_08617274) + sizeof(gMirageTower_Gfx))
+#define MIRAGE_TOWER_PALETTE_LENGTH 0x800
+#define ROOT_FOSSIL_GFX_LENGTH sizeof(gRootFossil_Gfx)
+#define ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH 0x100
+
+//struct
+struct Struct8617DA4 {
+    u8 x;
+    u8 y;
+    u16 tileId;
+};
+
+struct Struct203CF10 {
+    u8 *buffer;
+    u8 curr_buffer_index;
+};
+
+struct DynamicSpriteFrameImage{
+    u8 *data;
+    u16 size;
+};
+
+struct Struct203CF0C {
+    u8 *frameImageTiles;
+    struct DynamicSpriteFrameImage *frameImage;
+    u8 spriteId;
+    u16 *unkC;
+    u16 unk10;
+};
+
+// static functions
+static void sub_81BED50(u8 taskId);
+static void sub_81BEBF4(u8 taskId);
+static void sub_81BF028(u8 taskId);
+static void sub_81BF248(struct Sprite *);
+/*static*/ void sub_81BF2B8(u8* a, u16 b, u8 c, u8 d, u8 e);
+
+// .rodata
+static const u8 gUnknown_08617274[] = {00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00};
+static const u8 gMirageTower_Gfx[] = INCBIN_U8("graphics/misc/mirage_tower.4bpp");
+static const u16 gUnknown_08617B94[] = INCBIN_U16("graphics/misc/mirage_tower.bin");
+static const u16 gRootFossil_Pal[] = INCBIN_U16("graphics/misc/fossil.gbapal");
+static const u8 gRootFossil_Gfx[] = INCBIN_U8("graphics/misc/fossil.4bpp");
+static const u8 gMirageTowerCrumbles_Gfx[] = INCBIN_U8("graphics/misc/mirage_tower_crumbles.4bpp");
+static const u16 gMirageTowerCrumbles_Palette[] = INCBIN_U16("graphics/misc/mirage_tower_crumbles.gbapal");
+
+const s16 gUnknown_08617D64[][3] =
+    {
+        {  0,  10,  65},
+        { 17,   3,  50},
+        {-12,   0,  75},
+        { 10,  15,  90},
+        {  7,   8,  65},
+        {-18,   5,  75},
+        { 22, -10,  55},
+        {-24,  -4,  65},
+    };
+
+const struct SpriteSheet gUnknown_08617D94[] =
+{
+    {gMirageTowerCrumbles_Gfx, 0x0080, 0x0fa0},
+    {NULL}
+};
+
+static const struct Struct8617DA4 gUnknown_08617DA4[] =
+    {
+        {0x12, 0x35, 0x251},
+        {0x13, 0x35, 0x251},
+        {0x14, 0x35, 0x251},
+        {0x12, 0x36, 0x251},
+        {0x13, 0x36, 0x251},
+        {0x14, 0x36, 0x251},
+        {0x12, 0x37, 0x251},
+        {0x13, 0x37, 0x251},
+        {0x14, 0x37, 0x251},
+        {0x12, 0x38, 0x251},
+        {0x13, 0x38, 0x251},
+        {0x14, 0x38, 0x251},
+        {0x12, 0x39, 0x259},
+        {0x13, 0x39, 0x259},
+        {0x14, 0x39, 0x259},
+        {0x12, 0x3A, 0x121},
+        {0x13, 0x3A, 0x121},
+        {0x14, 0x3A, 0x121},
+    };
+
+static const union AnimCmd gSpriteAnim_8617DEC[] =
+{
+    ANIMCMD_FRAME(0, 1),
+    ANIMCMD_END,
+};
+
+static const struct OamData gOamData_8617DF4 =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 0,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 1,
+    .tileNum = 0,
+    .priority = 0,
+    .paletteNum = 3,
+    .affineParam = 0,
+};
+
+static const union AnimCmd *const gSpriteAnimTable_8617DFC[] =
+{
+    gSpriteAnim_8617DEC,
+};
+
+static const struct SpriteTemplate gUnknown_08617E00 = {
+    0xFFFF, 0xFFFF, &gOamData_8617DF4, gSpriteAnimTable_8617DFC, NULL, gDummySpriteAffineAnimTable, SpriteCallbackDummy
+};
+
+// ewram
+EWRAM_DATA u8* gUnknown_0203CF04 = NULL;
+EWRAM_DATA u8* gUnknown_0203CF08 = NULL;
+EWRAM_DATA struct Struct203CF0C *gUnknown_0203CF0C = NULL;
+EWRAM_DATA struct Struct203CF10 *gUnknown_0203CF10 = NULL;
+EWRAM_DATA u16 *gUnknown_0203CF14 = NULL;
+
+// iwram
+IWRAM_DATA u16 gUnknown_030012A8[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+
+// text
+void sub_81BEB24(void)
+{
+    u8 i;
+    for(i = 0; i < (sizeof(gUnknown_08617DA4)/sizeof(gUnknown_08617DA4[0])); i++)
+        MapGridSetMetatileIdAt(gUnknown_08617DA4[i].x + 7, gUnknown_08617DA4[i].y + 7, gUnknown_08617DA4[i].tileId);
+    DrawWholeMapView();
+}
+
+void sub_81BEB54(void)
+{
+    CreateTask(sub_81BED50, 0x9);
+}
+
+void sub_81BEB68(void)
+{
+    CreateTask(sub_81BEBF4, 0x9);
+}
+
+void sub_81BEB7C(void)
+{
+    CreateTask(sub_81BF028, 0x9);
+}
+
+void sub_81BEB90(void)
+{
+    SetGpuReg(REG_OFFSET_BG0HOFS, gUnknown_0203CF14[0]);
+    SetGpuReg(REG_OFFSET_BG0VOFS, gUnknown_0203CF14[1]);
+}
+
+void sub_81BEBB4(u8 taskId)
+{
+    if(!(gTasks[taskId].data[0]))
+    {
+        gUnknown_0203CF14[0] = -gUnknown_0203CF14[0];
+        gTasks[taskId].data[0] = 2;
+        sub_81BEB90();
+    }
+    else
+        gTasks[taskId].data[0]--;
+}
+
+static void sub_81BEBF4(u8 taskId)
+{
+    u8 zero;
+
+    switch(gTasks[taskId].data[0])
+    {
+    case 0:
+        FreeAllWindowBuffers();
+        SetBgAttribute(0, BG_CTRL_ATTR_MOSAIC, 2);
+        gTasks[taskId].data[0]++;
+        break;
+    case 1:
+        gUnknown_0203CF04 = (u8 *)AllocZeroed(MIRAGE_TOWER_GFX_LENGTH);
+        gUnknown_0203CF08 = (u8 *)AllocZeroed(MIRAGE_TOWER_PALETTE_LENGTH);
+        ChangeBgX(0, 0, 0);
+        ChangeBgY(0, 0, 0);
+        gTasks[taskId].data[0]++;
+        break;
+    case 2:
+        CpuSet(gUnknown_08617274, gUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH / 2);
+        LoadBgTiles(0, gUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH, 0);
+        gTasks[taskId].data[0]++;
+        break;
+    case 3:
+        SetBgTilemapBuffer(0, gUnknown_0203CF08);
+        CopyToBgTilemapBufferRect_ChangePalette(0, &gUnknown_08617B94, 12, 29, 6, 12, 17);
+        CopyBgTilemapBufferToVram(0);
+        gTasks[taskId].data[0]++;
+        break;
+    case 4:
+        ShowBg(0);
+        gTasks[taskId].data[0]++;
+        break;
+    case 5:
+        sub_81BEB24();
+        gTasks[taskId].data[0]++;
+        break;
+    case 6:
+        gUnknown_0203CF14 = (u16 *)Alloc(4);
+        zero = 0;
+        gUnknown_0203CF14[0] = 2;
+        gUnknown_0203CF14[1] = zero;
+        CreateTask(sub_81BEBB4, 0xA);
+        DestroyTask(taskId);
+        EnableBothScriptContexts();
+        break;
+    }
+}
+
+#ifdef NONMATCHING
+#define OUTER_BUFFER_LENGTH 0x60
+#define INNER_BUFFER_LENGTH 0x30
+static void sub_81BED50(u8 taskId)
+{
+    u8 anotherTaskId, j;
+
+
+    switch(gTasks[taskId].data[0])
+    {
+    case 1:
+        gUnknown_0203CF10 = (struct Struct203CF10 *)AllocZeroed(OUTER_BUFFER_LENGTH * sizeof(struct Struct203CF10));
+        break;
+    case 3:
+        {
+            u16 i;
+            u16 left;
+            u32 index, next;
+
+            index = (u16)gTasks[taskId].data[3];
+            if(gTasks[taskId].data[3] <= (OUTER_BUFFER_LENGTH - 1))
+            {
+                if(gTasks[taskId].data[1] > 1)
+                {
+                    index = (u8)index;
+                    gUnknown_0203CF10[index].buffer = (u8 *)Alloc(INNER_BUFFER_LENGTH);
+                    for(i = 0; i <= (INNER_BUFFER_LENGTH - 1); i++)
+                        gUnknown_0203CF10[index].buffer[i] = i;
+                    for(i = 0; i <= (INNER_BUFFER_LENGTH - 1); i++)
+                    {
+                        u16 rand1, rand2, temp;
+
+                        rand1 = Random() % 0x30;
+                        rand2 = Random() % 0x30;
+                        temp = gUnknown_0203CF10[index].buffer[rand2];
+                        gUnknown_0203CF10[index].buffer[rand2] = gUnknown_0203CF10[index].buffer[rand1];
+                        gUnknown_0203CF10[index].buffer[rand1] = temp;
+                    }
+                    if(gTasks[taskId].data[3] <= (OUTER_BUFFER_LENGTH - 1))
+                        gTasks[taskId].data[3]++;
+                    gTasks[taskId].data[1] = 0;
+                }
+                gTasks[taskId].data[1]++;
+            }
+            index = (u8)gTasks[taskId].data[3];
+            for(left = (u8)gTasks[taskId].data[2]; left < (u16)index; left = next)
+            {
+                j = 0;
+                next = left + 1;
+                while(!j)
+                {
+                    sub_81BF2B8(gUnknown_0203CF04, ((((OUTER_BUFFER_LENGTH - 1) - left) * INNER_BUFFER_LENGTH) + gUnknown_0203CF10[left].buffer[(gUnknown_0203CF10[left].curr_buffer_index)++]), 0, INNER_BUFFER_LENGTH, 1);
+                    j++;
+                }
+                if(gUnknown_0203CF10[left].curr_buffer_index > (INNER_BUFFER_LENGTH - 1))
+                {
+                    FREE_AND_SET_NULL(gUnknown_0203CF10[left].buffer);
+                    gTasks[taskId].data[2]++;
+                    if((left % 2) ==  1)
+                        gUnknown_0203CF14[1]--;
+                }
+            }
+            LoadBgTiles(0, gUnknown_0203CF04, MIRAGE_TOWER_GFX_LENGTH, 0);
+            if(gUnknown_0203CF10[OUTER_BUFFER_LENGTH - 1].curr_buffer_index > (INNER_BUFFER_LENGTH - 1))
+                break;
+            return;
+        }
+    case 4:
+        UnsetBgTilemapBuffer(0);
+        anotherTaskId = FindTaskIdByFunc(sub_81BEBB4);
+        if(anotherTaskId != 0xFF)
+            DestroyTask(anotherTaskId);
+        gUnknown_0203CF14[1] = gUnknown_0203CF14[0] = 0;
+        sub_81BEB90();
+        break;
+    case 5:
+        FREE_AND_SET_NULL(gUnknown_0203CF14);
+        FREE_AND_SET_NULL(gUnknown_0203CF10);
+        FREE_AND_SET_NULL(gUnknown_0203CF04);
+        FREE_AND_SET_NULL(gUnknown_0203CF08);
+        break;
+    case 6:
+        SetGpuRegBits(REG_OFFSET_BG2CNT, 0x2);
+        SetGpuRegBits(REG_OFFSET_BG0CNT, 0x0);
+        SetBgAttribute(0, BG_CTRL_ATTR_MOSAIC, 0);
+        sub_81971D0();
+        break;
+    case 7:
+        ShowBg(0);
+        break;
+    case 8:
+        DestroyTask(taskId);
+        EnableBothScriptContexts();
+        break;
+    }
+    gTasks[taskId].data[0]++;
+}
+
+#else
+ASM_DIRECT
+static void sub_81BED50(u8 taskId)
+{
+    asm("\n\
+        .syntax unified\n\
+        push {r4-r7,lr}\n\
+        mov r7, r10\n\
+        mov r6, r9\n\
+        mov r5, r8\n\
+        push {r5-r7}\n\
+        sub sp, 0x10\n\
+        lsls r0, 24\n\
+        lsrs r0, 24\n\
+        mov r10, r0\n\
+        ldr r1, =gTasks\n\
+        lsls r0, 2\n\
+        add r0, r10\n\
+        lsls r0, 3\n\
+        adds r0, r1\n\
+        ldrh r0, [r0, 0x8]\n\
+        subs r0, 0x1\n\
+        lsls r0, 16\n\
+        asrs r0, 16\n\
+        adds r6, r1, 0\n\
+        cmp r0, 0x7\n\
+        bls _081BED7C\n\
+        b _081BF002\n\
+    _081BED7C:\n\
+        lsls r0, 2\n\
+        ldr r1, =_081BED90\n\
+        adds r0, r1\n\
+        ldr r0, [r0]\n\
+        mov pc, r0\n\
+        .pool\n\
+        .align 2, 0\n\
+    _081BED90:\n\
+        .4byte _081BEDB0\n\
+        .4byte _081BF002\n\
+        .4byte _081BEDC4\n\
+        .4byte _081BEF64\n\
+        .4byte _081BEF94\n\
+        .4byte _081BEFD0\n\
+        .4byte _081BEFF0\n\
+        .4byte _081BEFF8\n\
+    _081BEDB0:\n\
+        ldr r4, =gUnknown_0203CF10\n\
+        movs r0, 0xC0\n\
+        lsls r0, 2\n\
+        bl AllocZeroed\n\
+        str r0, [r4]\n\
+        b _081BF002\n\
+        .pool\n\
+    _081BEDC4:\n\
+        mov r1, r10\n\
+        lsls r0, r1, 2\n\
+        adds r1, r0, r1\n\
+        lsls r1, 3\n\
+        adds r2, r1, r6\n\
+        ldrh r3, [r2, 0xE]\n\
+        movs r4, 0xE\n\
+        ldrsh r1, [r2, r4]\n\
+        str r0, [sp, 0x8]\n\
+        cmp r1, 0x5F\n\
+        bgt _081BEE8A\n\
+        movs r1, 0xA\n\
+        ldrsh r0, [r2, r1]\n\
+        cmp r0, 0x1\n\
+        ble _081BEE7C\n\
+        lsls r0, r3, 24\n\
+        lsrs r4, r0, 24\n\
+        movs r0, 0x30\n\
+        bl Alloc\n\
+        ldr r3, =gUnknown_0203CF10\n\
+        ldr r1, [r3]\n\
+        lsls r2, r4, 3\n\
+        adds r1, r2, r1\n\
+        str r0, [r1]\n\
+        movs r5, 0\n\
+        adds r4, r2, 0\n\
+    _081BEDFA:\n\
+        ldr r0, [r3]\n\
+        adds r0, r4, r0\n\
+        ldr r0, [r0]\n\
+        adds r0, r5\n\
+        strb r5, [r0]\n\
+        adds r0, r5, 0x1\n\
+        lsls r0, 16\n\
+        lsrs r5, r0, 16\n\
+        cmp r5, 0x2F\n\
+        bls _081BEDFA\n\
+        movs r5, 0\n\
+        ldr r7, =gUnknown_0203CF10\n\
+        adds r6, r2, 0\n\
+    _081BEE14:\n\
+        bl Random\n\
+        lsls r0, 16\n\
+        lsrs r0, 16\n\
+        movs r1, 0x30\n\
+        bl __umodsi3\n\
+        adds r4, r0, 0\n\
+        lsls r4, 16\n\
+        lsrs r4, 16\n\
+        bl Random\n\
+        lsls r0, 16\n\
+        lsrs r0, 16\n\
+        movs r1, 0x30\n\
+        bl __umodsi3\n\
+        lsls r0, 16\n\
+        lsrs r0, 16\n\
+        ldr r1, [r7]\n\
+        adds r1, r6, r1\n\
+        ldr r1, [r1]\n\
+        adds r0, r1, r0\n\
+        ldrb r2, [r0]\n\
+        adds r1, r4 \n\
+        ldrb r1, [r1]\n\
+        strb r1, [r0]\n\
+        ldr r0, [r7]\n\
+        adds r0, r6, r0\n\
+        ldr r0, [r0]\n\
+        adds r0, r4\n\
+        strb r2, [r0]\n\
+        adds r0, r5, 0x1\n\
+        lsls r0, 16\n\
+        lsrs r5, r0, 16\n\
+        cmp r5, 0x2F\n\
+        bls _081BEE14\n\
+        ldr r0, =gTasks\n\
+        ldr r1, [sp, 0x8]\n\
+        add r1, r10\n\
+        lsls r1, 3\n\
+        adds r2, r1, r0\n\
+        ldrh r3, [r2, 0xE]\n\
+        movs r4, 0xE\n\
+        ldrsh r1, [r2, r4]\n\
+        adds r6, r0, 0\n\
+        cmp r1, 0x5F\n\
+        bgt _081BEE78\n\
+        adds r0, r3, 0x1\n\
+        strh r0, [r2, 0xE]\n\
+    _081BEE78:\n\
+        movs r0, 0\n\
+        strh r0, [r2, 0xA]\n\
+    _081BEE7C:\n\
+        ldr r1, [sp, 0x8]\n\
+        add r1, r10\n\
+        lsls r1, 3\n\
+        adds r1, r6\n\
+        ldrh r0, [r1, 0xA]\n\
+        adds r0, 0x1\n\
+        strh r0, [r1, 0xA]\n\
+    _081BEE8A:\n\
+        ldr r0, [sp, 0x8]\n\
+        add r0, r10\n\
+        lsls r0, 3\n\
+        adds r0, r6\n\
+        ldrb r4, [r0, 0xE]\n\
+        ldrb r5, [r0, 0xC]\n\
+        lsls r0, r4, 16\n\
+        cmp r5, r4\n\
+        bcs _081BEF32\n\
+        str r0, [sp, 0xC]\n\
+    _081BEE9E:\n\
+        movs r6, 0\n\
+        adds r0, r5, 0x1\n\
+        str r0, [sp, 0x4]\n\
+        lsls r4, r5, 3\n\
+        movs r2, 0x5F\n\
+        subs r1, r2, r5\n\
+        lsls r0, r1, 1\n\
+        adds r0, r1\n\
+        lsls r0, 4\n\
+        mov r9, r0\n\
+    _081BEEB2:\n\
+        ldr r0, =gUnknown_0203CF04\n\
+        ldr r0, [r0]\n\
+        ldr r7, =gUnknown_0203CF10\n\
+        ldr r3, [r7]\n\
+        adds r3, r4, r3\n\
+        ldrb r2, [r3, 0x4]\n\
+        adds r1, r2, 0x1\n\
+        strb r1, [r3, 0x4]\n\
+        lsls r2, 24\n\
+        lsrs r2, 24\n\
+        ldr r1, [r3]\n\
+        adds r1, r2\n\
+        ldrb r1, [r1]\n\
+        add r1, r9\n\
+        lsls r1, 16\n\
+        lsrs r1, 16\n\
+        movs r2, 0x1\n\
+        mov r8, r2\n\
+        str r2, [sp]\n\
+        movs r2, 0\n\
+        movs r3, 0x30\n\
+        bl sub_81BF2B8\n\
+        adds r0, r6, 0x1\n\
+        lsls r0, 24\n\
+        lsrs r6, r0, 24\n\
+        cmp r6, 0\n\
+        beq _081BEEB2\n\
+        ldr r0, [r7]\n\
+        adds r1, r4, r0\n\
+        ldrb r0, [r1, 0x4]\n\
+        cmp r0, 0x2F\n\
+        bls _081BEF24\n\
+        ldr r0, [r1]\n\
+        bl Free\n\
+        ldr r0, [r7]\n\
+        adds r0, r4, r0\n\
+        movs r1, 0\n\
+        str r1, [r0]\n\
+        ldr r1, [sp, 0x8]\n\
+        add r1, r10\n\
+        lsls r1, 3\n\
+        ldr r4, =gTasks\n\
+        adds r1, r4\n\
+        ldrh r0, [r1, 0xC]\n\
+        adds r0, 0x1\n\
+        strh r0, [r1, 0xC]\n\
+        mov r0, r8\n\
+        ands r5, r0\n\
+        cmp r5, 0x1\n\
+        bne _081BEF24\n\
+        ldr r0, =gUnknown_0203CF14\n\
+        ldr r1, [r0]\n\
+        ldrh r0, [r1, 0x2]\n\
+        subs r0, 0x1\n\
+        strh r0, [r1, 0x2]\n\
+    _081BEF24:\n\
+        ldr r1, [sp, 0x4]\n\
+        lsls r0, r1, 16\n\
+        lsrs r5, r0, 16\n\
+        ldr r2, [sp, 0xC]\n\
+        lsrs r0, r2, 16\n\
+        cmp r5, r0\n\
+        bcc _081BEE9E\n\
+    _081BEF32:\n\
+        ldr r0, =gUnknown_0203CF04\n\
+        ldr r1, [r0]\n\
+        movs r2, 0x92\n\
+        lsls r2, 4\n\
+        movs r0, 0\n\
+        movs r3, 0\n\
+        bl LoadBgTiles\n\
+        ldr r0, =gUnknown_0203CF10\n\
+        ldr r0, [r0]\n\
+        movs r4, 0xBE\n\
+        lsls r4, 2\n\
+        adds r0, r4\n\
+        ldrb r0, [r0, 0x4]\n\
+        cmp r0, 0x2F\n\
+        bhi _081BF002\n\
+        b _081BF014\n\
+        .pool\n\
+    _081BEF64:\n\
+        movs r0, 0\n\
+        bl UnsetBgTilemapBuffer\n\
+        ldr r0, =sub_81BEBB4\n\
+        bl FindTaskIdByFunc\n\
+        lsls r0, 24\n\
+        lsrs r0, 24\n\
+        cmp r0, 0xFF\n\
+        beq _081BEF7C\n\
+        bl DestroyTask\n\
+    _081BEF7C:\n\
+        ldr r0, =gUnknown_0203CF14\n\
+        ldr r1, [r0]\n\
+        movs r0, 0\n\
+        strh r0, [r1]\n\
+        strh r0, [r1, 0x2]\n\
+        bl sub_81BEB90\n\
+        b _081BF002\n\
+        .pool\n\
+    _081BEF94:\n\
+        ldr r4, =gUnknown_0203CF14\n\
+        ldr r0, [r4]\n\
+        bl Free\n\
+        movs r5, 0\n\
+        str r5, [r4]\n\
+        ldr r4, =gUnknown_0203CF10\n\
+        ldr r0, [r4]\n\
+        bl Free\n\
+        str r5, [r4]\n\
+        ldr r4, =gUnknown_0203CF04\n\
+        ldr r0, [r4]\n\
+        bl Free\n\
+        str r5, [r4]\n\
+        ldr r4, =gUnknown_0203CF08\n\
+        ldr r0, [r4]\n\
+        bl Free\n\
+        str r5, [r4]\n\
+        b _081BF002\n\
+        .pool\n\
+    _081BEFD0:\n\
+        movs r0, 0xC\n\
+        movs r1, 0x2\n\
+        bl SetGpuRegBits\n\
+        movs r0, 0x8\n\
+        movs r1, 0\n\
+        bl SetGpuRegBits\n\
+        movs r0, 0\n\
+        movs r1, 0x7\n\
+        movs r2, 0\n\
+        bl SetBgAttribute\n\
+        bl sub_81971D0\n\
+        b _081BF002\n\
+    _081BEFF0:\n\
+        movs r0, 0\n\
+        bl ShowBg\n\
+        b _081BF002\n\
+    _081BEFF8:\n\
+        mov r0, r10\n\
+        bl DestroyTask\n\
+        bl EnableBothScriptContexts\n\
+    _081BF002:\n\
+        ldr r0, =gTasks\n\
+        mov r2, r10\n\
+        lsls r1, r2, 2\n\
+        add r1, r10\n\
+        lsls r1, 3\n\
+        adds r1, r0\n\
+        ldrh r0, [r1, 0x8]\n\
+        adds r0, 0x1\n\
+        strh r0, [r1, 0x8]\n\
+    _081BF014:\n\
+        add sp, 0x10\n\
+        pop {r3-r5}\n\
+        mov r8, r3\n\
+        mov r9, r4\n\
+        mov r10, r5\n\
+        pop {r4-r7}\n\
+        pop {r0}\n\
+        bx r0\n\
+        .pool\n\
+        .syntax divided");
+}
+#endif // NONMATCHING
+
+static void sub_81BF028(u8 taskId)
+{
+    u16 i;
+
+    switch(gTasks[taskId].data[0])
+    {
+    case 1:
+        gUnknown_0203CF0C = (struct Struct203CF0C *)AllocZeroed(sizeof(struct Struct203CF0C));
+        gUnknown_0203CF0C->frameImageTiles = (u8 *)AllocZeroed(ROOT_FOSSIL_GFX_LENGTH);
+        gUnknown_0203CF0C->frameImage = (struct DynamicSpriteFrameImage *) AllocZeroed(sizeof(struct DynamicSpriteFrameImage));
+        gUnknown_0203CF0C->unkC = (u16 *)AllocZeroed(ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16));
+        gUnknown_0203CF0C->unk10 = 0;
+        break;
+    case 2:
+        {
+            u8 *buffer;
+            buffer = gUnknown_0203CF0C->frameImageTiles;
+            for(i = 0; i < ROOT_FOSSIL_GFX_LENGTH; i++, buffer++)
+                *buffer = gRootFossil_Gfx[i];
+        }
+        break;
+    case 3:
+        gUnknown_0203CF0C->frameImage->data = gUnknown_0203CF0C->frameImageTiles;
+        gUnknown_0203CF0C->frameImage->size = ROOT_FOSSIL_GFX_LENGTH;
+        break;
+    case 4:
+        {
+            u8 spriteId, zero;
+            struct SpriteTemplate fossilTemplate;
+
+            fossilTemplate = gUnknown_08617E00;
+            fossilTemplate.images = (struct SpriteFrameImage *)(gUnknown_0203CF0C->frameImage);
+            spriteId = CreateSprite(&fossilTemplate, 128, -16, 1);
+            gUnknown_0203CF0C->spriteId = spriteId;
+            zero = 0;
+            gSprites[gUnknown_0203CF0C->spriteId].centerToCornerVecX = zero;
+            gSprites[gUnknown_0203CF0C->spriteId].data[0] = gSprites[gUnknown_0203CF0C->spriteId].pos1.x;
+            gSprites[gUnknown_0203CF0C->spriteId].data[1] = 1;
+        }
+    case 5:
+        for(i = 0; i < ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH; i++)
+            gUnknown_0203CF0C->unkC[i] = i;
+        break;
+    case 6:
+        {
+            u16 rand1, rand2, temp, j;
+            j = (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16)) - 1;
+            for(i = 0; i <= j; i++)
+            {
+                rand1 = Random() % 0x100;
+                rand2 = Random() % 0x100;
+                j = (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH * sizeof(u16)) - 1;
+                temp = gUnknown_0203CF0C->unkC[rand2];
+                gUnknown_0203CF0C->unkC[rand2] = gUnknown_0203CF0C->unkC[rand1];
+                gUnknown_0203CF0C->unkC[rand1] = temp;
+            }
+            gSprites[gUnknown_0203CF0C->spriteId].callback = sub_81BF248;
+            break;
+        }
+    case 7:
+        if(gSprites[gUnknown_0203CF0C->spriteId].callback != SpriteCallbackDummy)
+            return;
+        DestroySprite(&gSprites[gUnknown_0203CF0C->spriteId]);
+        FREE_AND_SET_NULL(gUnknown_0203CF0C->unkC);;
+        FREE_AND_SET_NULL(gUnknown_0203CF0C->frameImage);
+        FREE_AND_SET_NULL(gUnknown_0203CF0C->frameImageTiles);
+        FREE_AND_SET_NULL(gUnknown_0203CF0C);
+        break;
+    case 8:
+        EnableBothScriptContexts();
+    }
+    ++gTasks[taskId].data[0];
+}
+
+static void sub_81BF248(struct Sprite *sprite)
+{
+    if (gUnknown_0203CF0C->unk10 >= (ROOT_FOSSIL_GFX_RANDOMIZER_LENGTH))
+    {
+        sprite->callback = SpriteCallbackDummy;
+    }
+    else if (sprite->pos1.y >= 0x60)
+    {
+        u8 i;
+        for (i = 0; i < 2; i++)
+        {
+            sub_81BF2B8(gUnknown_0203CF0C->frameImageTiles, gUnknown_0203CF0C->unkC[gUnknown_0203CF0C->unk10++], 0, 16, 0);
+        }
+        StartSpriteAnim(sprite, 0);
+    }
+    else
+    {
+        sprite->pos1.y++;
+    }
+}