Merge branch 'DizzyEggg-decompile_cut'

asm/field_screen.s

@@ -8656,7 +8656,7 @@ task_mpl_807E3C8: @ 80AF6B0
 	bl ScriptContext2_Disable
 	adds r0, r4, 0
 	bl DestroyTask
-	bl sub_80984F4
+	bl ScriptUnfreezeEventObjects
 _080AF6CC:
 	pop {r4}
 	pop {r0}

asm/fldeff_80F9BCC.s

@@ -467,7 +467,7 @@ _080F9F54:
 	thumb_func_start sub_80F9F5C
 sub_80F9F5C: @ 80F9F5C
 	push {lr}
-	ldr r0, =gUnknown_0203AB40
+	ldr r0, =gPlayerFacingPosition
 	ldr r1, =gMapHeader
 	ldr r1, [r1, 0x4]
 	bl sub_80E9608
@@ -572,7 +572,7 @@ sub_80FA004: @ 80FA004
 	lsrs r0, 24
 	cmp r0, 0x2
 	bne _080FA0AE
-	ldr r4, =gUnknown_0203AB40
+	ldr r4, =gPlayerFacingPosition
 	adds r1, r4, 0x2
 	adds r0, r4, 0
 	bl GetXYCoordsOneStepInFrontOfPlayer
@@ -590,10 +590,10 @@ sub_80FA004: @ 80FA004
 	cmp r0, 0x1
 	bne _080FA070
 	bl sub_80F9F5C
-	ldr r1, =gUnknown_03005DB0
+	ldr r1, =gFieldCallback2
-	ldr r0, =FieldCallback_Teleport
+	ldr r0, =FieldCallback_PrepareFadeInFromMenu
 	str r0, [r1]
-	ldr r1, =gUnknown_0203CEEC
+	ldr r1, =gPostMenuFieldCallback
 	ldr r0, =sub_80FA0DC
 	b _080FA0C0
 	.pool
@@ -605,10 +605,10 @@ _080FA070:
 	cmp r0, 0x1
 	bne _080FA0A0
 	bl sub_80F9F5C
-	ldr r1, =gUnknown_03005DB0
+	ldr r1, =gFieldCallback2
-	ldr r0, =FieldCallback_Teleport
+	ldr r0, =FieldCallback_PrepareFadeInFromMenu
 	str r0, [r1]
-	ldr r1, =gUnknown_0203CEEC
+	ldr r1, =gPostMenuFieldCallback
 	ldr r0, =sub_80FA1E8
 	b _080FA0C0
 	.pool
@@ -624,10 +624,10 @@ _080FA0AE:
 	b _080FA0C4
 _080FA0B2:
 	bl sub_80F9F5C
-	ldr r1, =gUnknown_03005DB0
+	ldr r1, =gFieldCallback2
-	ldr r0, =FieldCallback_Teleport
+	ldr r0, =FieldCallback_PrepareFadeInFromMenu
 	str r0, [r1]
-	ldr r1, =gUnknown_0203CEEC
+	ldr r1, =gPostMenuFieldCallback
 	ldr r0, =sub_80FA34C
 _080FA0C0:
 	str r0, [r1]
@@ -824,7 +824,7 @@ sub_80FA234: @ 80FA234
 	thumb_func_start sub_80FA248
 sub_80FA248: @ 80FA248
 	push {r4,lr}
-	ldr r1, =gUnknown_0203AB40
+	ldr r1, =gPlayerFacingPosition
 	movs r2, 0
 	ldrsh r0, [r1, r2]
 	movs r2, 0x2

asm/party_menu.s

@@ -10199,10 +10199,10 @@ _081B5714:
 	movs r0, 0x5
 	bl PlaySE
 _081B571A:
-	ldr r0, =gUnknown_03005DB0
+	ldr r0, =gFieldCallback2
 	movs r1, 0
 	str r1, [r0]
-	ldr r0, =gUnknown_0203CEEC
+	ldr r0, =gPostMenuFieldCallback
 	str r1, [r0]
 	adds r0, r4, 0
 	bl sub_81B1C1C
@@ -10213,8 +10213,8 @@ _081B572A:
 	.pool
 	thumb_func_end sub_81B56D8
 
-	thumb_func_start FieldCallback_Teleport
+	thumb_func_start FieldCallback_PrepareFadeInFromMenu
-FieldCallback_Teleport: @ 81B5738
+FieldCallback_PrepareFadeInFromMenu: @ 81B5738
 	push {lr}
 	bl pal_fill_black
 	ldr r0, =task_launch_hm_phase_2
@@ -10224,7 +10224,7 @@ FieldCallback_Teleport: @ 81B5738
 	pop {r1}
 	bx r1
 	.pool
-	thumb_func_end FieldCallback_Teleport
+	thumb_func_end FieldCallback_PrepareFadeInFromMenu
 
 	thumb_func_start task_launch_hm_phase_2
 task_launch_hm_phase_2: @ 81B5750
@@ -10241,7 +10241,7 @@ task_launch_hm_phase_2: @ 81B5750
 	lsls r0, 16
 	lsrs r0, 16
 	str r0, [r1]
-	ldr r0, =gUnknown_0203CEEC
+	ldr r0, =gPostMenuFieldCallback
 	ldr r0, [r0]
 	bl _call_via_r0
 	adds r0, r4, 0
@@ -10345,10 +10345,10 @@ sub_81B5820: @ 81B5820
 	lsrs r0, 24
 	cmp r0, 0x1
 	bne _081B585C
-	ldr r1, =gUnknown_03005DB0
+	ldr r1, =gFieldCallback2
-	ldr r0, =FieldCallback_Teleport
+	ldr r0, =FieldCallback_PrepareFadeInFromMenu
 	str r0, [r1]
-	ldr r1, =gUnknown_0203CEEC
+	ldr r1, =gPostMenuFieldCallback
 	ldr r0, =hm_surf_run_dp02scr
 	str r0, [r1]
 	movs r0, 0x1
@@ -10463,10 +10463,10 @@ hm_prepare_waterfall: @ 81B58F0
 	lsrs r0, 24
 	cmp r0, 0x1
 	bne _081B594C
-	ldr r1, =gUnknown_03005DB0
+	ldr r1, =gFieldCallback2
-	ldr r0, =FieldCallback_Teleport
+	ldr r0, =FieldCallback_PrepareFadeInFromMenu
 	str r0, [r1]
-	ldr r1, =gUnknown_0203CEEC
+	ldr r1, =gPostMenuFieldCallback
 	ldr r0, =hm2_waterfall
 	str r0, [r1]
 	movs r0, 0x1
@@ -10510,10 +10510,10 @@ sub_81B5974: @ 81B5974
 	b _081B599E
 	.pool
 _081B5990:
-	ldr r1, =gUnknown_03005DB0
+	ldr r1, =gFieldCallback2
-	ldr r0, =FieldCallback_Teleport
+	ldr r0, =FieldCallback_PrepareFadeInFromMenu
 	str r0, [r1]
-	ldr r1, =gUnknown_0203CEEC
+	ldr r1, =gPostMenuFieldCallback
 	ldr r0, =sub_81B5958
 	str r0, [r1]
 	movs r0, 0x1
@@ -17276,7 +17276,7 @@ sub_81B9354: @ 81B9354
 	sub sp, 0xC
 	lsls r0, 24
 	lsrs r0, 24
-	ldr r2, =gUnknown_03005DB0
+	ldr r2, =gFieldCallback2
 	ldr r1, =hm_add_c3_without_phase_2
 	str r1, [r2]
 	movs r1, 0
@@ -17308,7 +17308,7 @@ sub_81B9390: @ 81B9390
 	movs r0, 0xFF
 	strh r0, [r4]
 _081B93A6:
-	ldr r0, =gUnknown_03005DB0
+	ldr r0, =gFieldCallback2
 	ldr r1, =hm_add_c3_without_phase_2
 	str r1, [r0]
 	ldr r0, =CB2_ReturnToField
@@ -17417,7 +17417,7 @@ _081B9486:
 	ldr r1, =gSpecialVar_0x8004
 	ldrb r0, [r2]
 	strh r0, [r1]
-	ldr r1, =gUnknown_03005DB0
+	ldr r1, =gFieldCallback2
 	ldr r0, =hm_add_c3_without_phase_2
 	str r0, [r1]
 	ldr r0, =CB2_ReturnToField
@@ -17553,7 +17553,7 @@ _081B95A4:
 	lsrs r0, 24
 	strh r0, [r4]
 _081B95BA:
-	ldr r0, =gUnknown_03005DB0
+	ldr r0, =gFieldCallback2
 	ldr r1, =hm_add_c3_without_phase_2
 	str r1, [r0]
 	ldr r0, =CB2_ReturnToField

asm/pokemon_summary_screen.s

@@ -2070,7 +2070,7 @@ sub_81C4F44: @ 81C4F44
 	cmp r0, 0
 	bne _081C4F6E
 	bl overworld_free_bg_tilemaps
-	ldr r0, =gUnknown_03005DB0
+	ldr r0, =gFieldCallback2
 	ldr r1, =hm_add_c3_without_phase_2
 	str r1, [r0]
 	ldr r1, =CB2_ReturnToField

asm/pokenav.s

@@ -26527,8 +26527,8 @@ _081D4A0E:
 	bx r1
 	thumb_func_end EventObjectIsFarawayIslandMew
 
-	thumb_func_start unown_chamber_related
+	thumb_func_start IsMewPlayingHideAndSeek
-unown_chamber_related: @ 81D4A14
+IsMewPlayingHideAndSeek: @ 81D4A14
 	push {lr}
 	ldr r0, =gSaveBlock1Ptr
 	ldr r0, [r0]
@@ -26557,7 +26557,7 @@ _081D4A50:
 _081D4A52:
 	pop {r1}
 	bx r1
-	thumb_func_end unown_chamber_related
+	thumb_func_end IsMewPlayingHideAndSeek
 
 	thumb_func_start sub_81D4A58
 sub_81D4A58: @ 81D4A58

common_syms/overworld.txt

@@ -1,5 +1,5 @@
 gUnknown_03005DA8
 gFieldCallback
-gUnknown_03005DB0
+gFieldCallback2
 gUnknown_03005DB4
 gFieldLinkPlayerCount

data/field_effect_scripts.s

@@ -78,11 +78,11 @@ gFieldEffectScript_ExclamationMarkIcon1:: @ 82DBAE0
 	field_eff_end
 
 gFieldEffectScript_UseCutOnTallGrass:: @ 82DBAE6
-	field_eff_callnative sub_80D3A6C
+	field_eff_callnative FldEff_UseCutOnGrass
 	field_eff_end
 
 gFieldEffectScript_UseCutOnTree:: @ 82DBAEC
-	field_eff_callnative sub_80D3ABC
+	field_eff_callnative FldEff_UseCutOnTree
 	field_eff_end
 
 gFieldEffectScript_Shadow:: @ 82DBAF2
@@ -308,7 +308,7 @@ gFieldEffectScript_Unknown57:: @ 82DBCB8
 	field_eff_end
 
 gFieldEffectScript_Unknown58:: @ 82DBCC2
-	field_eff_loadfadedpal_callnative gFieldEffectObjectPaletteInfo6, sub_80D3B00
+	field_eff_loadfadedpal_callnative gFieldEffectObjectPaletteInfo6, FldEff_CutGrass
 	field_eff_end
 
 gFieldEffectScript_FieldMoveShowMonInit:: @ 82DBCCC

data/fldeff_cut.s

@@ -1,32 +0,0 @@
-    .include "asm/macros.inc"
-    .include "constants/constants.inc"
-
-    .section .rodata
-    .align 2, 0
-
-gUnknown_0857C608:: @ 857C608
-	.byte 0xfe, 0xfe, 0x01, 0x00, 0xff, 0xfe, 0x01, 0x00, 0x00, 0xfe, 0x02, 0x00, 0x01, 0xfe, 0x03, 0x00, 0x02, 0xfe, 0x03, 0x00, 0xfe, 0xff, 0x01, 0x00, 0x02, 0xff, 0x03, 0x00, 0xfe, 0x00, 0x04, 0x00, 0x02, 0x00
-	.byte 0x06, 0x00, 0xfe, 0x01, 0x07, 0x00, 0x02, 0x01, 0x09, 0x00, 0xfe, 0x02, 0x07, 0x00, 0xff, 0x02, 0x07, 0x00, 0x00, 0x02, 0x08, 0x00, 0x01, 0x02, 0x09, 0x00, 0x02, 0x02, 0x09, 0x00
-	
-gUnknown_0857C648:: @ 857C648
-	.2byte 0
-	.2byte 0
-	.2byte 0x1401
-	.2byte 0
-
-gUnknown_0857C650:: @ 857C650	
-	obj_image_anim_frame 0, 0x1E
-	obj_image_anim_jump 0
-	
-gUnknown_0857C658:: @ 857C658	
-	.4byte gUnknown_0857C650
-	
-gUnknown_0857C65C:: @ 857C65C
-	obj_frame_tiles gFieldEffectObjectPic_ShadowExtraLarge + 0x520, 32
-
-	.align 2
-gFieldEffectObjectPaletteInfo6:: @ 857C664
-	obj_pal gFieldEffectObjectPalette6, 0x1000
-
-gUnknown_0857C66C:: @ 857C66C
-	spr_template -1, 0x1000, gUnknown_0857C648, gUnknown_0857C658, gUnknown_0857C65C, gDummySpriteAffineAnimTable, objc_8097BA8

data/party_menu.s

@@ -431,7 +431,7 @@ gUnknown_08615D7E:: @ 8615D7E
 
 	.align 2
 gUnknown_08615D9C:: @ 8615D9C
-	.4byte sub_80D3718, 0x00000007
+	.4byte SetUpFieldMove_Cut, 0x00000007
 	.4byte SetUpFieldMove_Flash, 0x0000000d
 	.4byte SetUpFieldMove_RockSmash, 0x0000000d
 	.4byte SetUpFieldMove_Strength, 0x0000000d

include/field_effect.h

@@ -78,8 +78,8 @@ enum FieldEffectScriptIdx
 };
 
 extern s32 gFieldEffectArguments[8];
-extern void (*gUnknown_0203CEEC)(void);
+extern void (*gPostMenuFieldCallback)(void);
-extern bool8 (*gUnknown_03005DB0)(void);
+extern bool8 (*gFieldCallback2)(void);
 
 u32 FieldEffectStart(u8);
 bool8 FieldEffectActiveListContains(u8 id);

include/fldeff_cut.h

@@ -1,7 +1,13 @@
 #ifndef GUARD_FLDEFF_CUT_H
 #define GUARD_FLDEFF_CUT_H
 
-void sub_80D423C(s16, s16);
+extern const struct SpritePalette gFieldEffectObjectPaletteInfo6;
-void sub_80D42B8(s16, s16);
+
+bool8 SetUpFieldMove_Cut(void);
+bool8 FldEff_UseCutOnGrass(void);
+bool8 FldEff_UseCutOnTree(void);
+bool8 FldEff_CutGrass(void);
+void sub_80D423C(s16 x, s16 y);
+void sub_80D42B8(s16 x, s16 y);
 
 #endif // GUARD_FLDEFF_CUT_H

include/global.h

@@ -867,7 +867,7 @@ struct MapPosition
 {
     s16 x;
     s16 y;
-    u8 height;
+    s8 height;
 };
 
 struct UnkStruct_8054FF8

include/metatile_behavior.h

@@ -74,7 +74,7 @@ bool8 MetatileBehavior_IsPuddle(u8);
 bool8 MetatileBehavior_IsTallGrass(u8);
 bool8 MetatileBehavior_IsLongGrass(u8);
 bool8 MetatileBehavior_IsBerryTreeSoil(u8);
-bool8 MetatileBehavior_IsAsh(u8);
+bool8 MetatileBehavior_IsAshGrass(u8);
 bool8 MetatileBehavior_IsUnusedFootprintMetatile(u8);
 bool8 MetatileBehavior_IsBridge(u8);
 u8 MetatileBehavior_GetBridgeSth(u8);

include/party_menu.h

@@ -28,7 +28,7 @@ void DoWallyTutorialBagMenu(void);
 u8 pokemon_ailments_get_primary(u32 status);
 u8 *GetMonNickname(struct Pokemon *mon, u8 *dst);
 u8 GetCursorSelectionMonId(void);
-bool8 FieldCallback_Teleport(void);
+bool8 FieldCallback_PrepareFadeInFromMenu(void);
 void sub_81B7F60(void);
 
 void sub_81B0FCC(u8 partyIdx, u8 a);

include/rom6.h

@@ -12,7 +12,7 @@ void UpdateFrontierManiac(u16 days);
 void UpdateFrontierGambler(u16 days);
 void SetShoalItemFlag(u16 days);
 
-bool8 npc_before_player_of_type(u8);
+bool8 CheckObjectGraphicsInFrontOfPlayer(u8);
 u8 oei_task_add(void);
 
 #endif //GUARD_ROM6_H

ld_script.txt

@@ -128,7 +128,7 @@ SECTIONS {
         asm/pokemon_storage_system.o(.text);
         src/pokemon_icon.o(.text);
         src/script_movement.o(.text);
-        asm/fldeff_cut.o(.text);
+        src/fldeff_cut.o(.text);
         src/mail_data.o(.text);
         src/map_name_popup.o(.text);
         src/item_menu_icons.o(.text);
@@ -425,7 +425,7 @@ SECTIONS {
         src/pokemon_storage_system.o(.rodata);
         data/pokemon_storage_system.o(.rodata);
         src/pokemon_icon.o(.rodata);
-        data/fldeff_cut.o(.rodata);
+        src/fldeff_cut.o(.rodata);
         src/map_name_popup.o(.rodata);
         src/item_menu_icons.o(.rodata);
         data/contest.o(.rodata);

src/data/field_event_obj/event_object_graphics.h

@@ -1376,7 +1376,9 @@ const u32 gFieldEffectObjectPic_ShadowSmall[] = INCBIN_U32("graphics/event_objec
 const u32 gFieldEffectObjectPic_ShadowMedium[] = INCBIN_U32("graphics/event_objects/pics/effects/shadow_medium.4bpp");
 const u32 gFieldEffectObjectPic_ShadowLarge[] = INCBIN_U32("graphics/event_objects/pics/effects/shadow_large.4bpp");
 const u32 gFieldEffectObjectPic_ShadowExtraLarge[] = INCBIN_U32("graphics/event_objects/pics/effects/shadow_extra_large.4bpp");
-const u32 gUnknown_084F6D38[] = INCBIN_U32("graphics/event_objects/pics/effects/unknown_4F6D38/0.4bpp");
+const u32 filler_8368A08[0x48] = {};
+const u8 gFieldEffectPic_CutGrass[] = INCBIN_U8("graphics/event_objects/pics/effects/cut_grass.4bpp");
+const u32 gFieldEffectPic_CutGrass_Copy[] = INCBIN_U32("graphics/event_objects/pics/effects/cut_grass.4bpp");
 const u16 gFieldEffectObjectPalette6[] = INCBIN_U16("graphics/event_objects/palettes/field_effect_object_palette_06.gbapal");
 const u32 gFieldEffectObjectPic_Ripple_0[] = INCBIN_U32("graphics/event_objects/pics/effects/ripple/0.4bpp");
 const u32 gFieldEffectObjectPic_Ripple_1[] = INCBIN_U32("graphics/event_objects/pics/effects/ripple/1.4bpp");

src/event_obj_lock.c

@@ -87,7 +87,7 @@ void LockSelectedEventObject(void)
     }
 }
 
-void sub_80984F4(void)
+void ScriptUnfreezeEventObjects(void)
 {
     u8 objectId = GetEventObjectIdByLocalIdAndMap(0xFF, 0, 0);
     EventObjectClearHeldMovementIfFinished(&gEventObjects[objectId]);

src/field_effect.c

@@ -561,7 +561,7 @@ u8 CreateMonSprite_PicBox(u16 species, s16 x, s16 y)
     PreservePaletteInWeather(IndexOfSpritePaletteTag(gMonPaletteTable[species].tag) + 0x10);
     if (spriteId == 0xFFFF)
         return 0x40;
-    
+
     return spriteId;
 }
 #else
@@ -623,7 +623,7 @@ u8 CreateMonSprite_FieldMove(u16 species, u32 d, u32 g, s16 x, s16 y, u8 subprio
     PreservePaletteInWeather(IndexOfSpritePaletteTag(spritePalette->tag) + 0x10);
     if (spriteId == 0xFFFF)
         return 0x40;
-    
+
     return spriteId;
 }
 

src/field_tasks.c

@@ -623,7 +623,7 @@ static void PerStepCallback_8069F64(u8 taskId)
     {
         data[1] = x;
         data[2] = y;
-        if (MetatileBehavior_IsAsh(MapGridGetMetatileBehaviorAt(x, y)))
+        if (MetatileBehavior_IsAshGrass(MapGridGetMetatileBehaviorAt(x, y)))
         {
             if (MapGridGetMetatileIdAt(x, y) == 0x20a)
             {

src/fldeff_cut.c

@@ -1,19 +1,683 @@
-
-// Includes
 #include "global.h"
+#include "fldeff_cut.h"
+#include "field_camera.h"
+#include "field_effect.h"
+#include "event_object_movement.h"
+#include "field_player_avatar.h"
+#include "fieldmap.h"
+#include "event_obj_lock.h"
+#include "metatile_behavior.h"
+#include "party_menu.h"
+#include "overworld.h"
+#include "script.h"
+#include "sound.h"
+#include "sprite.h"
+#include "task.h"
+#include "trig.h"
+#include "malloc.h"
+#include "constants/event_objects.h"
+#include "constants/songs.h"
+#include "constants/abilities.h"
 
-// Static type declarations
+extern bool8 CheckObjectGraphicsInFrontOfPlayer(u8);
+extern u8 oei_task_add(void);
+extern void ScriptUnfreezeEventObjects(void);
+extern bool8 IsMewPlayingHideAndSeek(void);
 
-// Static RAM declarations
+extern struct MapPosition gPlayerFacingPosition;
 
-IWRAM_DATA u8 gUnknown_03001100;
+extern const u8 Route103_EventScript_290705[];
-IWRAM_DATA u8 gUnknown_03001101;
+extern const u8 FarawayIsland_Interior_EventScript_267EDB[];
-IWRAM_DATA u8 gUnknown_03001102;
-IWRAM_DATA u32 fldeff_cut_unused_03001104;
-IWRAM_DATA u8 gUnknown_03001108[25];
 
-// Static ROM declarations
+extern const u8 gFieldEffectPic_CutGrass[];
+extern const u16 gFieldEffectObjectPalette6[];
 
-// .rodata
+// tileset 0 as first
+#define METATILE_ID_GRASS 0x1
+#define METATILE_ID_POKE_GRASS 0xD
 
-// .text
+#define METATILE_ID_POKE_GRASS_TREE_UP 0x25
+#define METATILE_ID_GRASS_TREE_UP 0xE
+
+#define METATILE_ID_POKE_GRASS_TREE_LEFT 0x1C6
+#define METATILE_ID_POKE_GRASS_TREE_RIGHT 0x1C7
+
+#define METATILE_ID_GRASS_TREE_LEFT 0x1CE
+#define METATILE_ID_GRASS_TREE_RIGHT 0x1CF
+
+#define METATILE_ID_POKE_LONG_GRASS 0x15
+
+// tileset 6 as second
+#define METATILE_ID_POKE_STEP_LAVA_GRASS 0x206
+#define METATILE_ID_POKE_LAVA_GRASS 0x207
+#define METATILE_ID_LAVA_FIELD 0x271
+
+// tileset 7 as second
+#define METATILE_ID_POKE_ASH_GRASS 0x20A
+#define METATILE_ID_POKE_STEP_ASH_GRASS 0x212
+#define METATILE_ID_ASH 0x218
+
+// tileset 8 as second
+#define METATILE_ID_POKE_LONG_GRASS_START 0x208
+
+#define METATILE_ID_SECRET_BASE_LEFT_LONG_GRASS 0x279
+#define METATILE_ID_SECRET_BASE_CENTER_LONG_GRASS 0x27A
+#define METATILE_ID_SECRET_BASE_RIGHT_LONG_GRASS 0x27B
+
+#define METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS 0x281
+#define METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS 0x282
+#define METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS 0x283
+
+// cut 'square' defines
+#define CUT_NORMAL_SIDE 3
+#define CUT_NORMAL_AREA CUT_NORMAL_SIDE * CUT_NORMAL_SIDE
+
+#define CUT_HYPER_SIDE 5
+#define CUT_HYPER_AREA CUT_HYPER_SIDE * CUT_HYPER_SIDE
+
+#define CUT_SPRITE_ARRAY_COUNT 8
+
+struct HyperCutterUnk
+{
+    s8 x;
+    s8 y;
+    u8 unk2[2];
+};
+
+// this file's functions
+static void FieldCallback_CutTree(void);
+static void FieldCallback_CutGrass(void);
+static void StartCutTreeFieldEffect(void);
+static void StartCutGrassFieldEffect(void);
+static void SetCutGrassMetatile(s16, s16);
+static void SetCutGrassMetatiles(s16, s16);
+static void CutGrassSpriteCallback1(struct Sprite *);
+static void CutGrassSpriteCallback2(struct Sprite *);
+static void CutGrassSpriteCallbackEnd(struct Sprite *);
+static void HandleLongGrassOnHyper(u8, s16, s16);
+
+// IWRAM variables
+static IWRAM_DATA u8 sCutSquareSide;
+static IWRAM_DATA u8 sTileCountFromPlayer_X;
+static IWRAM_DATA u8 sTileCountFromPlayer_Y;
+static IWRAM_DATA u32 sUnused;
+static IWRAM_DATA bool8 sHyperCutTiles[CUT_HYPER_AREA];
+
+// EWRAM variables
+static EWRAM_DATA u8 *sCutGrassSpriteArrayPtr = NULL;
+
+// const rom data
+static const struct HyperCutterUnk sHyperCutStruct[] =
+{
+    {-2, -2, {1}},
+    {-1, -2, {1}},
+    {0, -2, {2}},
+    {1, -2, {3}},
+    {2, -2, {3}},
+    {-2, -1, {1}},
+    {2, -1, {3}},
+    {-2, 0, {4}},
+    {2, 0, {6}},
+    {-2, 1, {7}},
+    {2, 1, {9}},
+    {-2, 2, {7}},
+    {-1, 2, {7}},
+    {0, 2, {8}},
+    {1, 2, {9}},
+    {2, 2, {9}},
+};
+
+static const struct OamData sOamData_CutGrass =
+{
+    .y = 0,
+    .affineMode = 0,
+    .objMode = 0,
+    .mosaic = 0,
+    .bpp = 0,
+    .shape = 0,
+    .x = 0,
+    .matrixNum = 0,
+    .size = 0,
+    .tileNum = 1,
+    .priority = 1,
+    .paletteNum = 1,
+    .affineParam = 0,
+};
+
+static const union AnimCmd sSpriteAnim_CutGrass[] =
+{
+    ANIMCMD_FRAME(0, 30),
+    ANIMCMD_JUMP(0),
+};
+
+static const union AnimCmd *const sSpriteAnimTable_CutGrass[] =
+{
+    sSpriteAnim_CutGrass,
+};
+
+static const struct SpriteFrameImage sSpriteImageTable_CutGrass[] =
+{
+    {gFieldEffectPic_CutGrass, 0x20},
+};
+
+const struct SpritePalette gFieldEffectObjectPaletteInfo6 = {gFieldEffectObjectPalette6, 0x1000};
+
+static const struct SpriteTemplate sSpriteTemplate_CutGrass =
+{
+    .tileTag = 0xFFFF,
+    .paletteTag = 0x1000,
+    .oam = &sOamData_CutGrass,
+    .anims = sSpriteAnimTable_CutGrass,
+    .images = sSpriteImageTable_CutGrass,
+    .affineAnims = gDummySpriteAffineAnimTable,
+    .callback = CutGrassSpriteCallback1,
+};
+
+// code
+bool8 SetUpFieldMove_Cut(void)
+{
+    s16 x, y;
+    u8 i, j;
+    u8 tileBehavior;
+    u8 userAbility;
+    bool8 cutTiles[CUT_NORMAL_AREA];
+    bool8 ret;
+
+    if (CheckObjectGraphicsInFrontOfPlayer(EVENT_OBJ_GFX_CUTTABLE_TREE) == TRUE)
+    {
+        // Standing in front of cuttable tree.
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
+        gPostMenuFieldCallback = FieldCallback_CutTree;
+        return TRUE;
+    }
+    else
+    {
+        PlayerGetDestCoords(&gPlayerFacingPosition.x, &gPlayerFacingPosition.y);
+        userAbility = GetMonAbility(&gPlayerParty[GetCursorSelectionMonId()]);
+        if (userAbility == ABILITY_HYPER_CUTTER)
+        {
+            sCutSquareSide = CUT_HYPER_SIDE;
+            sTileCountFromPlayer_X = 2;
+            sTileCountFromPlayer_Y = 2;
+        }
+        else
+        {
+            sCutSquareSide = CUT_NORMAL_SIDE;
+            sTileCountFromPlayer_X = 1;
+            sTileCountFromPlayer_Y = 1;
+        }
+
+        for (i = 0; i < CUT_NORMAL_AREA; i++)
+            cutTiles[i] = FALSE;
+        for (i = 0; i < CUT_HYPER_AREA; i++)
+            sHyperCutTiles[i] = FALSE;
+
+        ret = FALSE;
+
+        for (i = 0; i < CUT_NORMAL_SIDE; i++)
+        {
+            y = i - 1 + gPlayerFacingPosition.y;
+            for (j = 0; j < CUT_NORMAL_SIDE; j++)
+            {
+                x = j - 1 + gPlayerFacingPosition.x;
+                if (MapGridGetZCoordAt(x, y) == gPlayerFacingPosition.height)
+                {
+                    tileBehavior = MapGridGetMetatileBehaviorAt(x, y);
+                    if (MetatileBehavior_IsPokeGrass(tileBehavior) == TRUE
+                    || MetatileBehavior_IsAshGrass(tileBehavior) == TRUE)
+                    {
+                        // Standing in front of grass.
+                        sHyperCutTiles[6 + (i * 5) + j] = TRUE;
+                        ret = TRUE;
+                    }
+                    if (MapGridIsImpassableAt(x, y) == TRUE)
+                    {
+                        cutTiles[i * 3 + j] = FALSE;
+                    }
+                    else
+                    {
+                        cutTiles[i * 3 + j] = TRUE;
+                        if (MetatileBehavior_IsCuttableGrass(tileBehavior) == TRUE)
+                            sHyperCutTiles[6 + (i * 5) + j] = TRUE;
+                    }
+                }
+                else
+                {
+                    cutTiles[i * 3 + j] = FALSE;
+                }
+            }
+        }
+
+        if (userAbility != ABILITY_HYPER_CUTTER)
+        {
+            if (ret == TRUE)
+            {
+                gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
+                gPostMenuFieldCallback = FieldCallback_CutGrass;
+            }
+        }
+        else
+        {
+            bool8 tileCuttable;
+            for (i = 0; i < 16; i++)
+            {
+                x = gPlayerFacingPosition.x + sHyperCutStruct[i].x;
+                y = gPlayerFacingPosition.y + sHyperCutStruct[i].y;
+                tileCuttable = TRUE;
+
+                j = 0;
+                do
+                {
+                    if (sHyperCutStruct[i].unk2[j] == 0)
+                        break;
+                    if (cutTiles[(u8)(sHyperCutStruct[i].unk2[j] - 1)] == FALSE)
+                    {
+                        tileCuttable = FALSE;
+                        break;
+                    }
+                } while (++j <= 1);
+
+                if (tileCuttable == TRUE)
+                {
+                    if (MapGridGetZCoordAt(x, y) == gPlayerFacingPosition.height)
+                    {
+                        u8 tileArrayId = ((sHyperCutStruct[i].y * 5) + 12) + (sHyperCutStruct[i].x);
+                        tileBehavior = MapGridGetMetatileBehaviorAt(x, y);
+                        if (MetatileBehavior_IsPokeGrass(tileBehavior) == TRUE
+                        || MetatileBehavior_IsAshGrass(tileBehavior) == TRUE)
+                        {
+                            gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
+                            gPostMenuFieldCallback = FieldCallback_CutGrass;
+                            sHyperCutTiles[tileArrayId] = TRUE;
+                            ret = TRUE;
+                        }
+                        else
+                        {
+                            if (MetatileBehavior_IsCuttableGrass(tileBehavior) == TRUE)
+                                sHyperCutTiles[tileArrayId] = TRUE;
+                        }
+                    }
+                }
+            }
+
+            if (ret == TRUE)
+            {
+                gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
+                gPostMenuFieldCallback = FieldCallback_CutGrass;
+            }
+        }
+
+        return ret;
+    }
+}
+
+static void FieldCallback_CutGrass(void)
+{
+    FieldEffectStart(FLDEFF_USE_CUT_ON_GRASS);
+    gFieldEffectArguments[0] = GetCursorSelectionMonId();
+}
+
+bool8 FldEff_UseCutOnGrass(void)
+{
+    u8 taskId = oei_task_add();
+
+    gTasks[taskId].data[8] = (u32)StartCutGrassFieldEffect >> 16;
+    gTasks[taskId].data[9] = (u32)StartCutGrassFieldEffect;
+    IncrementGameStat(GAME_STAT_USED_CUT);
+    return FALSE;
+}
+
+static void FieldCallback_CutTree(void)
+{
+    gFieldEffectArguments[0] = GetCursorSelectionMonId();
+    ScriptContext1_SetupScript(Route103_EventScript_290705);
+}
+
+bool8 FldEff_UseCutOnTree(void)
+{
+    u8 taskId = oei_task_add();
+
+    gTasks[taskId].data[8] = (u32)StartCutTreeFieldEffect >> 16;
+    gTasks[taskId].data[9] = (u32)StartCutTreeFieldEffect;
+    IncrementGameStat(GAME_STAT_USED_CUT);
+    return FALSE;
+}
+
+static void StartCutGrassFieldEffect(void)
+{
+    FieldEffectActiveListRemove(FLDEFF_USE_CUT_ON_GRASS);
+    FieldEffectStart(FLDEFF_CUT_GRASS);
+}
+
+bool8 FldEff_CutGrass(void)
+{
+    s16 x, y;
+    u8 i = 0;
+
+    PlaySE(SE_W015);
+    PlayerGetDestCoords(&gPlayerFacingPosition.x, &gPlayerFacingPosition.y);
+    for (i = 0; i < CUT_HYPER_AREA; i++)
+    {
+        if (sHyperCutTiles[i] == TRUE)
+        {
+            s8 xAdd = (i % 5) - 2;
+            s8 yAdd = (i / 5) - 2;
+
+            x = xAdd + gPlayerFacingPosition.x;
+            y = yAdd + gPlayerFacingPosition.y;
+
+            SetCutGrassMetatile(x, y);
+            sub_808E75C(x, y);
+        }
+    }
+
+    SetCutGrassMetatiles(gPlayerFacingPosition.x - sTileCountFromPlayer_X, gPlayerFacingPosition.y - (1 + sTileCountFromPlayer_Y));
+    DrawWholeMapView();
+    sCutGrassSpriteArrayPtr = AllocZeroed(CUT_SPRITE_ARRAY_COUNT);
+
+    // populate sprite ID array
+    for (i = 0; i < CUT_SPRITE_ARRAY_COUNT; i++)
+    {
+        sCutGrassSpriteArrayPtr[i] = CreateSprite(&sSpriteTemplate_CutGrass,
+        gSprites[gPlayerAvatar.spriteId].oam.x + 8, gSprites[gPlayerAvatar.spriteId].oam.y + 20, 0);
+        gSprites[sCutGrassSpriteArrayPtr[i]].data[2] = 32 * i;
+    }
+
+    return FALSE;
+}
+
+// set map grid metatile depending on x, y
+static void SetCutGrassMetatile(s16 x, s16 y)
+{
+    s32 metatileId = MapGridGetMetatileIdAt(x, y);
+
+    switch (metatileId)
+    {
+    case METATILE_ID_POKE_LONG_GRASS_START:
+    case METATILE_ID_POKE_LONG_GRASS:
+    case METATILE_ID_POKE_GRASS:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_GRASS);
+        break;
+    case METATILE_ID_POKE_GRASS_TREE_LEFT:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_GRASS_TREE_LEFT);
+        break;
+    case METATILE_ID_POKE_GRASS_TREE_RIGHT:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_GRASS_TREE_RIGHT);
+        break;
+    case METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_SECRET_BASE_LEFT_LONG_GRASS);
+        break;
+    case METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_SECRET_BASE_CENTER_LONG_GRASS);
+        break;
+    case METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_SECRET_BASE_RIGHT_LONG_GRASS);
+        break;
+    case METATILE_ID_POKE_STEP_LAVA_GRASS:
+    case METATILE_ID_POKE_LAVA_GRASS:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_LAVA_FIELD);
+        break;
+    case METATILE_ID_POKE_STEP_ASH_GRASS:
+    case METATILE_ID_POKE_ASH_GRASS:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_ASH);
+        break;
+    case METATILE_ID_POKE_GRASS_TREE_UP:
+        MapGridSetMetatileIdAt(x, y, METATILE_ID_GRASS_TREE_UP);
+        break;
+    }
+}
+
+enum
+{
+    LONG_GRASS_NONE,
+    LONG_GRASS_FIELD,
+    LONG_GRASS_BASE_LEFT,
+    LONG_GRASS_BASE_CENTER,
+    LONG_GRASS_BASE_RIGHT
+};
+
+static u8 GetLongGrassCaseAt(s16 x, s16 y)
+{
+    u16 metatileId = MapGridGetMetatileIdAt(x, y);
+
+    if (metatileId == METATILE_ID_GRASS)
+        return LONG_GRASS_FIELD;
+    else if (metatileId == METATILE_ID_SECRET_BASE_LEFT_LONG_GRASS)
+        return LONG_GRASS_BASE_LEFT;
+    else if (metatileId == METATILE_ID_SECRET_BASE_CENTER_LONG_GRASS)
+        return LONG_GRASS_BASE_CENTER;
+    else if (metatileId == METATILE_ID_SECRET_BASE_RIGHT_LONG_GRASS)
+        return LONG_GRASS_BASE_RIGHT;
+    else
+        return LONG_GRASS_NONE;
+}
+
+static void SetCutGrassMetatiles(s16 x, s16 y)
+{
+    s16 i;
+    s16 lowerY = y + sCutSquareSide;
+
+    for (i = 0; i < sCutSquareSide; i++)
+    {
+        s16 currentX = x + i;
+        if (MapGridGetMetatileIdAt(currentX, y) == METATILE_ID_POKE_LONG_GRASS)
+        {
+            switch (GetLongGrassCaseAt(currentX, y + 1))
+            {
+            case LONG_GRASS_FIELD:
+                MapGridSetMetatileIdAt(currentX, y + 1, METATILE_ID_POKE_LONG_GRASS_START);
+                break;
+            case LONG_GRASS_BASE_LEFT:
+                MapGridSetMetatileIdAt(currentX, y + 1, METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS);
+                break;
+            case LONG_GRASS_BASE_CENTER:
+                MapGridSetMetatileIdAt(currentX, y + 1, METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS);
+                break;
+            case LONG_GRASS_BASE_RIGHT:
+                MapGridSetMetatileIdAt(currentX, y + 1, METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS);
+                break;
+            }
+        }
+        if (MapGridGetMetatileIdAt(currentX, lowerY) == METATILE_ID_GRASS)
+        {
+            if (MapGridGetMetatileIdAt(currentX, lowerY + 1) == METATILE_ID_POKE_LONG_GRASS_START)
+                MapGridSetMetatileIdAt(currentX, lowerY + 1, METATILE_ID_GRASS);
+            if (MapGridGetMetatileIdAt(currentX, lowerY + 1) == METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS)
+                MapGridSetMetatileIdAt(currentX, lowerY + 1, METATILE_ID_SECRET_BASE_LEFT_LONG_GRASS);
+            if (MapGridGetMetatileIdAt(currentX, lowerY + 1) == METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS)
+                MapGridSetMetatileIdAt(currentX, lowerY + 1, METATILE_ID_SECRET_BASE_CENTER_LONG_GRASS);
+            if (MapGridGetMetatileIdAt(currentX, lowerY + 1) == METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS)
+                MapGridSetMetatileIdAt(currentX, lowerY + 1, METATILE_ID_SECRET_BASE_RIGHT_LONG_GRASS);
+        }
+    }
+
+    if (sCutSquareSide == CUT_HYPER_SIDE)
+    {
+        HandleLongGrassOnHyper(0, x, y);
+        HandleLongGrassOnHyper(1, x, y);
+    }
+}
+
+static void HandleLongGrassOnHyper(u8 caseId, s16 x, s16 y)
+{
+    s16 newX;
+    bool8 arr[3];
+
+    if (caseId == 0)
+    {
+        arr[0] = sHyperCutTiles[5];
+        arr[1] = sHyperCutTiles[10];
+        arr[2] = sHyperCutTiles[15];
+        newX = x;
+    }
+    else if (caseId == 1)
+    {
+        arr[0] = sHyperCutTiles[9];
+        arr[1] = sHyperCutTiles[14];
+        arr[2] = sHyperCutTiles[19];
+        newX = x + 4;
+    }
+    else // invalid case
+    {
+        return;
+    }
+
+    if (arr[0] == TRUE)
+    {
+        if (MapGridGetMetatileIdAt(newX, y + 3) == METATILE_ID_POKE_LONG_GRASS_START)
+            MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_GRASS);
+        if (MapGridGetMetatileIdAt(newX, y + 3) == METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS)
+            MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_SECRET_BASE_LEFT_LONG_GRASS);
+        if (MapGridGetMetatileIdAt(newX, y + 3) == METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS)
+            MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_SECRET_BASE_CENTER_LONG_GRASS);
+        if (MapGridGetMetatileIdAt(newX, y + 3) == METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS)
+            MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_SECRET_BASE_RIGHT_LONG_GRASS);
+    }
+    if (arr[1] == TRUE)
+    {
+        if (MapGridGetMetatileIdAt(newX, y + 2) == METATILE_ID_POKE_LONG_GRASS)
+        {
+            switch (GetLongGrassCaseAt(newX, y + 3))
+            {
+            case LONG_GRASS_FIELD:
+                MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_POKE_LONG_GRASS_START);
+                break;
+            case LONG_GRASS_BASE_LEFT:
+                MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS);
+                break;
+            case LONG_GRASS_BASE_CENTER:
+                MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS);
+                break;
+            case LONG_GRASS_BASE_RIGHT:
+                MapGridSetMetatileIdAt(newX, y + 3, METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS);
+                break;
+            }
+        }
+
+        if (MapGridGetMetatileIdAt(newX, y + 4) == METATILE_ID_POKE_LONG_GRASS_START)
+            MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_GRASS);
+        if (MapGridGetMetatileIdAt(newX, y + 4) == METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS)
+            MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_SECRET_BASE_LEFT_LONG_GRASS);
+        if (MapGridGetMetatileIdAt(newX, y + 4) == METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS)
+            MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_SECRET_BASE_CENTER_LONG_GRASS);
+        if (MapGridGetMetatileIdAt(newX, y + 4) == METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS)
+            MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_SECRET_BASE_RIGHT_LONG_GRASS);
+    }
+    if (arr[2] == TRUE)
+    {
+        if (MapGridGetMetatileIdAt(newX, y + 3) == METATILE_ID_POKE_LONG_GRASS)
+        {
+            switch (GetLongGrassCaseAt(newX, y + 4))
+            {
+            case LONG_GRASS_FIELD:
+                MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_POKE_LONG_GRASS_START);
+                break;
+            case LONG_GRASS_BASE_LEFT:
+                MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS);
+                break;
+            case LONG_GRASS_BASE_CENTER:
+                MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS);
+                break;
+            case LONG_GRASS_BASE_RIGHT:
+                MapGridSetMetatileIdAt(newX, y + 4, METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS);
+                break;
+            }
+        }
+    }
+}
+
+static void CutGrassSpriteCallback1(struct Sprite *sprite)
+{
+    sprite->data[0] = 8;
+    sprite->data[1] = 0;
+    sprite->data[3] = 0;
+    sprite->callback = CutGrassSpriteCallback2;
+}
+
+static void CutGrassSpriteCallback2(struct Sprite *sprite)
+{
+    sprite->pos2.x = Sin(sprite->data[2], sprite->data[0]);
+    sprite->pos2.y = Cos(sprite->data[2], sprite->data[0]);
+
+    sprite->data[2] = (sprite->data[2] + 8) & 0xFF;
+    sprite->data[0] += 1 + (sprite->data[3] >> 2); // right shift by 2 is dividing by 4
+    sprite->data[3]++;
+
+    if (sprite->data[1] != 28)
+        sprite->data[1]++;
+    else
+        sprite->callback = CutGrassSpriteCallbackEnd; // done rotating the grass, execute clean up function
+}
+
+static void CutGrassSpriteCallbackEnd(struct Sprite *sprite)
+{
+    u8 i;
+
+    for (i = 1; i < CUT_SPRITE_ARRAY_COUNT; i++)
+        DestroySprite(&gSprites[sCutGrassSpriteArrayPtr[i]]);
+
+    FieldEffectStop(&gSprites[sCutGrassSpriteArrayPtr[0]], FLDEFF_CUT_GRASS);
+    FREE_AND_SET_NULL(sCutGrassSpriteArrayPtr);
+    ScriptUnfreezeEventObjects();
+    ScriptContext2_Disable();
+
+    if (IsMewPlayingHideAndSeek() == TRUE)
+        ScriptContext1_SetupScript(FarawayIsland_Interior_EventScript_267EDB);
+}
+
+void sub_80D423C(s16 x, s16 y)
+{
+    u8 metatileBehavior = MapGridGetMetatileBehaviorAt(x, y);
+    if (MetatileBehavior_IsLongGrass_Duplicate(metatileBehavior))
+    {
+        switch (GetLongGrassCaseAt(x, y + 1))
+        {
+        case LONG_GRASS_FIELD:
+            MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_POKE_LONG_GRASS_START);
+            break;
+        case LONG_GRASS_BASE_LEFT:
+            MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS);
+            break;
+        case LONG_GRASS_BASE_CENTER:
+            MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS);
+            break;
+        case LONG_GRASS_BASE_RIGHT:
+            MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS);
+            break;
+        }
+    }
+}
+
+void sub_80D42B8(s16 x, s16 y)
+{
+    if (MapGridGetMetatileIdAt(x, y) == METATILE_ID_GRASS)
+    {
+        u8 metatileBehavior = MapGridGetMetatileBehaviorAt(x, y + 1);
+        if (MetatileBehavior_IsLongGrassSouthEdge(metatileBehavior))
+        {
+            s32 metatileId = MapGridGetMetatileIdAt(x, y + 1);
+            switch (metatileId)
+            {
+            case METATILE_ID_POKE_LONG_GRASS_START:
+                MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_GRASS);
+                break;
+            case METATILE_ID_SECRET_BASE_LEFT_POKE_LONG_GRASS:
+                MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_SECRET_BASE_LEFT_LONG_GRASS);
+                break;
+            case METATILE_ID_SECRET_BASE_CENTER_POKE_LONG_GRASS:
+                MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_SECRET_BASE_CENTER_LONG_GRASS);
+                break;
+            case METATILE_ID_SECRET_BASE_RIGHT_POKE_LONG_GRASS:
+                MapGridSetMetatileIdAt(x, y + 1, METATILE_ID_SECRET_BASE_RIGHT_LONG_GRASS);
+                break;
+            }
+        }
+    }
+}
+
+static void StartCutTreeFieldEffect(void)
+{
+    PlaySE(SE_W015);
+    FieldEffectActiveListRemove(FLDEFF_USE_CUT_ON_TREE);
+    EnableBothScriptContexts();
+}

src/fldeff_flash.c

@@ -78,14 +78,14 @@ bool8 SetUpFieldMove_Flash(void)
     if (ShouldDoBrailleFlyEffect())
     {
         gSpecialVar_Result = GetCursorSelectionMonId();
-        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-        gUnknown_0203CEEC = sub_8179918;
+        gPostMenuFieldCallback = sub_8179918;
         return TRUE;
     }
     else if (gMapHeader.cave == TRUE && !FlagGet(FLAG_SYS_USE_FLASH))
     {
-        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-        gUnknown_0203CEEC = hm2_flash;
+        gPostMenuFieldCallback = hm2_flash;
         return TRUE;
     }
 

src/fldeff_strength.c

@@ -6,6 +6,7 @@
 #include "rom6.h"
 #include "script.h"
 #include "task.h"
+#include "constants/event_objects.h"
 
 // static functions
 static void FldEff_UseStrength(void);
@@ -14,11 +15,11 @@ static void sub_8145E74(void);
 // text
 bool8 SetUpFieldMove_Strength(void)
 {
-    if (npc_before_player_of_type(87) == TRUE)
+    if (CheckObjectGraphicsInFrontOfPlayer(EVENT_OBJ_GFX_PUSHABLE_BOULDER) == TRUE)
     {
         gSpecialVar_Result = GetCursorSelectionMonId();
-        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-        gUnknown_0203CEEC = FldEff_UseStrength;
+        gPostMenuFieldCallback = FldEff_UseStrength;
         return TRUE;
     }
     return FALSE;

src/fldeff_sweetscent.c

@@ -24,8 +24,8 @@ void sub_81BE72C(void);
 
 bool8 SetUpFieldMove_SweetScent(void)
 {
-    gUnknown_03005DB0 = FieldCallback_Teleport;
+    gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-    gUnknown_0203CEEC = hm2_sweet_scent;
+    gPostMenuFieldCallback = hm2_sweet_scent;
     return TRUE;
 }
 

src/fldeff_teleport.c

@@ -11,8 +11,8 @@ bool8 SetUpFieldMove_Teleport(void)
 {
     if (Overworld_MapTypeAllowsTeleportAndFly(gMapHeader.mapType) == TRUE)
     {
-        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-        gUnknown_0203CEEC = hm_teleport_run_dp02scr;
+        gPostMenuFieldCallback = hm_teleport_run_dp02scr;
         return TRUE;
     }
     return FALSE;

src/item_use.c

@@ -39,7 +39,7 @@ extern void sub_81C5B14(u8 taskId);
 extern u8 gText_DadsAdvice[];
 extern u8 gText_CantDismountBike[];
 extern void sub_8197434(u8 a, u8 b);
-extern void sub_80984F4(void);
+extern void ScriptUnfreezeEventObjects(void);
 extern void ItemUseOutOfBattle_TMHM(u8 a);
 extern void ItemUseOutOfBattle_EvolutionStone(u8 b);
 extern void bag_menu_mail_related(void);
@@ -197,7 +197,7 @@ void CleanUpAfterFailingToUseRegisteredKeyItemOnField(u8 taskId)
 {
     sub_8197434(0, 1);
     DestroyTask(taskId);
-    sub_80984F4();
+    ScriptUnfreezeEventObjects();
     ScriptContext2_Disable();
 }
 
@@ -252,7 +252,7 @@ void ItemUseOnFieldCB_Bike(u8 taskId)
         GetOnOffBike(2);
     else
         GetOnOffBike(4);
-    sub_80984F4();
+    ScriptUnfreezeEventObjects();
     ScriptContext2_Disable();
     DestroyTask(taskId);
 }
@@ -358,7 +358,7 @@ void sub_80FD504(u8 taskId)
 void sub_80FD5CC(u8 taskId)
 {
     sub_8197434(0, 1);
-    sub_80984F4();
+    ScriptUnfreezeEventObjects();
     ScriptContext2_Disable();
     DestroyTask(taskId);
 }

src/metatile_behavior.c

@@ -846,7 +846,7 @@ bool8 MetatileBehavior_IsBerryTreeSoil(u8 var)
         return FALSE;
 }
 
-bool8 MetatileBehavior_IsAsh(u8 var)
+bool8 MetatileBehavior_IsAshGrass(u8 var)
 {
     if (var == MB_ASHGRASS)
         return TRUE;

src/overworld.c

@@ -88,7 +88,7 @@ extern const u16 gUnknown_82EC7C4[];
 
 u16 gUnknown_03005DA8;
 MainCallback gFieldCallback;
-bool8 (*gUnknown_03005DB0)(void);
+bool8 (*gFieldCallback2)(void);
 u8 gUnknown_03005DB4;
 u8 gFieldLinkPlayerCount;
 
@@ -1518,15 +1518,15 @@ void sub_8085E94(void *a0)
 
 static bool8 map_post_load_hook_exec(void)
 {
-    if (gUnknown_03005DB0 != NULL)
+    if (gFieldCallback2 != NULL)
     {
-        if (!gUnknown_03005DB0())
+        if (!gFieldCallback2())
         {
             return FALSE;
         }
         else
         {
-            gUnknown_03005DB0 = NULL;
+            gFieldCallback2 = NULL;
             gFieldCallback = NULL;
         }
     }
@@ -1554,7 +1554,7 @@ void CB2_NewGame(void)
     ScriptContext1_Init();
     ScriptContext2_Disable();
     gFieldCallback = ExecuteTruckSequence;
-    gUnknown_03005DB0 = NULL;
+    gFieldCallback2 = NULL;
     do_load_map_stuff_loop(&gMain.state);
     SetFieldVBlankCallback();
     SetMainCallback1(CB1_Overworld);
@@ -1684,7 +1684,7 @@ void c2_8056854(void)
 void CB2_ReturnToFieldWithOpenMenu(void)
 {
     FieldClearVBlankHBlankCallbacks();
-    gUnknown_03005DB0 = sub_80AF6A4;
+    gFieldCallback2 = sub_80AF6A4;
     CB2_ReturnToField();
 }
 

src/rom6.c

@@ -27,16 +27,16 @@ static void hm2_dig(void);
 static void sub_8135780(void);
 
 // extern RAM loc
-extern struct MapPosition gUnknown_0203AB40;
+extern struct MapPosition gPlayerFacingPosition;
 
 // text
-bool8 npc_before_player_of_type(u8 a)
+bool8 CheckObjectGraphicsInFrontOfPlayer(u8 a)
 {
     u8 eventObjId;
 
-    GetXYCoordsOneStepInFrontOfPlayer(&gUnknown_0203AB40.x, &gUnknown_0203AB40.y);
+    GetXYCoordsOneStepInFrontOfPlayer(&gPlayerFacingPosition.x, &gPlayerFacingPosition.y);
-    gUnknown_0203AB40.height = PlayerGetZCoord();
+    gPlayerFacingPosition.height = PlayerGetZCoord();
-    eventObjId = GetEventObjectIdByXYZ(gUnknown_0203AB40.x, gUnknown_0203AB40.y, gUnknown_0203AB40.height);
+    eventObjId = GetEventObjectIdByXYZ(gPlayerFacingPosition.x, gPlayerFacingPosition.y, gPlayerFacingPosition.height);
     if (gEventObjects[eventObjId].graphicsId != a)
     {
         return FALSE;
@@ -50,7 +50,7 @@ bool8 npc_before_player_of_type(u8 a)
 
 u8 oei_task_add(void)
 {
-    GetXYCoordsOneStepInFrontOfPlayer(&gUnknown_0203AB40.x, &gUnknown_0203AB40.y);
+    GetXYCoordsOneStepInFrontOfPlayer(&gPlayerFacingPosition.x, &gPlayerFacingPosition.y);
     return CreateTask(task08_080C9820, 8);
 }
 
@@ -118,17 +118,17 @@ static void sub_813561C(u8 taskId)
 
 bool8 SetUpFieldMove_RockSmash(void)
 {
-    if(ShouldDoBrailleStrengthEffect())
+    if (ShouldDoBrailleStrengthEffect())
     {
         gSpecialVar_Result = GetCursorSelectionMonId();
-        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-        gUnknown_0203CEEC = sub_8179834;
+        gPostMenuFieldCallback = sub_8179834;
         return TRUE;
     }
-    else if (npc_before_player_of_type(0x56) == TRUE)
+    else if (CheckObjectGraphicsInFrontOfPlayer(EVENT_OBJ_GFX_BREAKABLE_ROCK) == TRUE)
     {
-        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-        gUnknown_0203CEEC = sub_81356C4;
+        gPostMenuFieldCallback = sub_81356C4;
         return TRUE;
     }
     else
@@ -164,8 +164,8 @@ bool8 SetUpFieldMove_Dig(void)
 {
     if (CanUseEscapeRopeOnCurrMap() == TRUE)
     {
-        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gFieldCallback2 = FieldCallback_PrepareFadeInFromMenu;
-        gUnknown_0203CEEC = hm2_dig;
+        gPostMenuFieldCallback = hm2_dig;
         return TRUE;
     }
     else

src/start_menu.c

@@ -90,7 +90,7 @@ extern void sub_80C4DDC(void (*)(void));
 extern void sub_80C51C4(void (*)(void));
 extern void sub_80C4E74(u8, void (*)(void));
 extern void sub_81C4EFC(void);
-extern void sub_80984F4(void);
+extern void ScriptUnfreezeEventObjects(void);
 extern void sub_81A9EC8(void);
 extern void save_serialize_map(void);
 extern void sub_81A9E90(void);
@@ -526,7 +526,7 @@ void sub_809FA18(void) // Called from field_screen.s
 {
     sUnknown_02037619[0] = 0;
     sUnknown_02037619[1] = 0;
-    gUnknown_03005DB0 = sub_809FA00;
+    gFieldCallback2 = sub_809FA00;
 }
 
 void sub_809FA34(u8 taskId) // Referenced in field_screen.s and rom_8011DC0.s
@@ -769,7 +769,7 @@ static bool8 StartMenuBattlePyramidRetireCallback(void)
 void sub_809FDD4(void) // Called from battle_frontier_2.s
 {
     sub_8197DF8(0, FALSE);
-    sub_80984F4();
+    ScriptUnfreezeEventObjects();
     CreateStartMenuTask(sub_809FA34);
     ScriptContext2_Enable();
 }
@@ -811,7 +811,7 @@ static bool8 SaveCallback(void)
     case SAVE_SUCCESS:
     case SAVE_ERROR:    // Close start menu
         sub_8197DF8(0, TRUE);
-        sub_80984F4();
+        ScriptUnfreezeEventObjects();
         ScriptContext2_Disable();
         sub_81A9EC8();
         return TRUE;
@@ -848,7 +848,7 @@ static bool8 BattlePyramidRetireCallback(void)
         return FALSE;
     case SAVE_CANCELED: // Yes (Retire from battle pyramid)
         sub_8197DF8(0, TRUE);
-        sub_80984F4();
+        ScriptUnfreezeEventObjects();
         ScriptContext2_Disable();
         ScriptContext1_SetupScript(BattleFrontier_BattlePyramidEmptySquare_EventScript_252C88);
         return TRUE;
@@ -1405,7 +1405,7 @@ static void HideStartMenuWindow(void)
 {
     sub_819746C(GetStartMenuWindowId(), TRUE);
     RemoveStartMenuWindow();
-    sub_80984F4();
+    ScriptUnfreezeEventObjects();
     ScriptContext2_Disable();
 }
 

sym_ewram.txt

@@ -384,10 +384,7 @@ gUnknown_02039D8C: @ 2039D8C
 	.space 0x4
 
 	.include "src/script_movement.o"
-
+	.include "src/fldeff_cut.o"
-gUnknown_02039DD0: @ 2039DD0
-	.space 0x4
-
 	.include "src/map_name_popup.o"
 	.include "src/item.o"
 
@@ -607,7 +604,7 @@ gUnknown_0203AB34: @ 203AB34
     .include "src/battle_ai_script_commands.o"
     
 .align 2
-gUnknown_0203AB40: @ 203AB40
+gPlayerFacingPosition: @ 203AB40
 	.space 0x8
 	
 	.include "src/pokeblock.o"
@@ -844,7 +841,7 @@ gUnknown_0203CEE8: @ 203CEE8
 gUnknown_0203CEE9: @ 203CEE9
 	.space 0x3
 
-gUnknown_0203CEEC: @ 203CEEC
+gPostMenuFieldCallback: @ 203CEEC
 	.space 0x4
 
 gUnknown_0203CEF0: @ 203CEF0