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Merge pull request #522 from ketsuban/the-diffening
Convert code samples to diffs
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dc1d0217a1
@ -76,21 +76,21 @@ This is a bug with `SpeciesItemBoost` in [engine/battle/effect_commands.asm](/en
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**Fix:**
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```asm
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```diff
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; Double the stat
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sla l
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rl h
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ld a, HIGH(MAX_STAT_VALUE)
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cp h
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jr c, .cap
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ld a, LOW(MAX_STAT_VALUE)
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cp l
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ret nc
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.cap
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ld h, HIGH(MAX_STAT_VALUE)
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ld l, LOW(MAX_STAT_VALUE)
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+
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+ ld a, HIGH(MAX_STAT_VALUE)
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+ cp h
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+ jr c, .cap
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+ ld a, LOW(MAX_STAT_VALUE)
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+ cp l
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+ ret nc
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+
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+.cap
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+ ld h, HIGH(MAX_STAT_VALUE)
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+ ld l, LOW(MAX_STAT_VALUE)
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ret
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```
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@ -123,7 +123,7 @@ This is a bug with `DittoMetalPowder` in [engine/battle/effect_commands.asm](/en
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**Fix:**
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```asm
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```diff
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ld a, c
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srl a
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add c
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@ -138,17 +138,17 @@ This is a bug with `DittoMetalPowder` in [engine/battle/effect_commands.asm](/en
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.done
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scf
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rr c
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ld a, HIGH(MAX_STAT_VALUE)
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cp b
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jr c, .cap
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ld a, LOW(MAX_STAT_VALUE)
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cp c
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ret nc
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.cap
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ld b, HIGH(MAX_STAT_VALUE)
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ld c, LOW(MAX_STAT_VALUE)
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+
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+ ld a, HIGH(MAX_STAT_VALUE)
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+ cp b
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+ jr c, .cap
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+ ld a, LOW(MAX_STAT_VALUE)
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+ cp c
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+ ret nc
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+
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+.cap
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+ ld b, HIGH(MAX_STAT_VALUE)
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+ ld c, LOW(MAX_STAT_VALUE)
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ret
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```
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@ -430,16 +430,16 @@ BattleCommand_BeatUpFailText:
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**Fix:**
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```asm
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```diff
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BattleCommand_BeatUpFailText:
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; beatupfailtext
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ld a, [wBeatUpHitAtLeastOnce]
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and a
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ret nz
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inc a
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ld [wAttackMissed], a
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+
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+ inc a
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+ ld [wAttackMissed], a
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jp PrintButItFailed
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```
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@ -640,22 +640,22 @@ CalcExpAtLevel:
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**Fix:**
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```asm
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```diff
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CalcExpAtLevel:
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; (a/b)*n**3 + c*n**2 + d*n - e
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ld a, d
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cp 1
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jr nz, .UseExpFormula
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; Pokémon have 0 experience at level 1
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xor a
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ld hl, hProduct
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ld [hli], a
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ld [hli], a
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ld [hli], a
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ld [hl], a
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ret
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.UseExpFormula
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+ ld a, d
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+ cp 1
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+ jr nz, .UseExpFormula
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+; Pokémon have 0 experience at level 1
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+ xor a
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+ ld hl, hProduct
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+ ld [hli], a
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+ ld [hli], a
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+ ld [hli], a
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+ ld [hl], a
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+ ret
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+
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+.UseExpFormula
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ld a, [wBaseGrowthRate]
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add a
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add a
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@ -864,10 +864,11 @@ HappinessData_DaisysGrooming:
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**Fix:**
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```asm
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```diff
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HappinessData_DaisysGrooming:
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db $80, 2, HAPPINESS_GROOMING ; 50% chance
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db $ff, 2, HAPPINESS_GROOMING ; 50% chance
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- db $ff, 2, HAPPINESS_GROOMING ; 99.6% chance
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+ db $80, 2, HAPPINESS_GROOMING ; 50% chance
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+ db $ff, 2, HAPPINESS_GROOMING ; 50% chance
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```
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@ -1061,18 +1062,18 @@ This is a bug with `PlayBattleMusic` in [engine/battle/start_battle.asm](/engine
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**Fix:**
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```asm
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```diff
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ld de, MUSIC_ROCKET_BATTLE
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cp GRUNTM
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jr z, .done
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cp GRUNTF
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jr z, .done
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cp EXECUTIVEM
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jr z, .done
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cp EXECUTIVEF
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jr z, .done
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cp SCIENTIST
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jr z, .done
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+ cp EXECUTIVEM
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+ jr z, .done
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+ cp EXECUTIVEF
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+ jr z, .done
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+ cp SCIENTIST
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+ jr z, .done
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```
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@ -1107,10 +1108,12 @@ This is a bug with `DoPlayerMovement.CheckWarp` in [engine/overworld/player_move
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**Fix:**
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```asm
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```diff
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ld a, [wWalkingDirection]
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cp STANDING
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jr z, .not_warp
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- ; cp STANDING
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- ; jr z, .not_warp
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+ cp STANDING
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+ jr z, .not_warp
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ld e, a
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ld d, 0
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ld hl, .EdgeWarps
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@ -1122,6 +1125,9 @@ This is a bug with `DoPlayerMovement.CheckWarp` in [engine/overworld/player_move
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ld a, 1
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ld [wd041], a
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ld a, [wWalkingDirection]
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- ; This is in the wrong place.
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- cp STANDING
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- jr z, .not_warp
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```
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@ -1303,15 +1309,27 @@ This is a bug with `PokeBallEffect` in [engine/items/item_effects.asm](/engine/i
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**Fix:**
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```asm
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```diff
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ld hl, wEnemySubStatus5
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ld a, [hl]
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push af
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set SUBSTATUS_TRANSFORMED, [hl]
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-; This code is buggy. Any wild Pokémon that has Transformed will be
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-; caught as a Ditto, even if it was something else like Mew.
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-; To fix, do not set [wTempEnemyMonSpecies] to DITTO.
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bit SUBSTATUS_TRANSFORMED, a
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jr nz, .load_data
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- jr nz, .ditto
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- jr .not_ditto
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+ jr nz, .load_data
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-.ditto
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- ld a, DITTO
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- ld [wTempEnemyMonSpecies], a
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- jr .load_data
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-
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-.not_ditto
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- set SUBSTATUS_TRANSFORMED, [hl]
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ld hl, wEnemyBackupDVs
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ld a, [wEnemyMonDVs]
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ld [hli], a
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@ -1347,12 +1365,14 @@ This is a bug with `PokeBallEffect` in [engine/items/item_effects.asm](/engine/i
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**Fix:**
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```asm
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```diff
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.room_in_party
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xor a
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ld [wWildMon], a
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ld a, [wBattleType]
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cp BATTLETYPE_CONTEST
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- ld a, [wCurItem]
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- cp PARK_BALL
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+ ld a, [wBattleType]
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+ cp BATTLETYPE_CONTEST
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call nz, ReturnToBattle_UseBall
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```
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@ -1429,10 +1449,10 @@ This is a bug with `PlacePartyMonEvoStoneCompatibility.DetermineCompatibility` i
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ld a, [hli]
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and a
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jr z, .nope
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cp EVOLVE_STAT
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jr nz, .not_four_bytes
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inc hl
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.not_four_bytes
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+ cp EVOLVE_STAT
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+ jr nz, .not_four_bytes
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+ inc hl
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+.not_four_bytes
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inc hl
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inc hl
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cp EVOLVE_ITEM
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@ -1542,11 +1562,12 @@ ValidateTempWildMonSpecies:
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**Fix:**
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```asm
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```diff
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ld a, b
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ld [wCurPartyLevel], a
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ld b, [hl]
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ld a, b
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- ; ld a, b
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+ ld a, b
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call ValidateTempWildMonSpecies
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jr c, .nowildbattle
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@ -152,21 +152,22 @@ Don't enforce `org $4000` in pokecrystal.link.
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Modify `GetFrontpicPointer`:
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```asm
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```diff
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ld a, [wCurPartySpecies]
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cp UNOWN
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jr z, .unown
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ld a, [wCurPartySpecies]
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ld hl, PokemonPicPointers
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+ ld hl, PokemonPicPointers
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ld d, BANK(PokemonPicPointers)
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jr .ok
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.unown
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ld a, [wUnownLetter]
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ld hl, UnownPicPointers
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+ ld hl, UnownPicPointers
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ld d, BANK(UnownPicPointers)
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.ok
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- ld hl, PokemonPicPointers ; UnownPicPointers
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dec a
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ld bc, 6
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call AddNTimes
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@ -175,13 +176,15 @@ Modify `GetFrontpicPointer`:
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And `GetMonBackpic`:
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```asm
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- ; These are assumed to be at the same address in their respective banks.
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- ld hl, PokemonPicPointers ; UnownPicPointers
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ld a, b
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ld hl, PokemonPicPointers
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+ ld hl, PokemonPicPointers
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ld d, BANK(PokemonPicPointers)
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cp UNOWN
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jr nz, .ok
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ld a, c
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ld hl, UnownPicPointers
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+ ld hl, UnownPicPointers
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ld d, BANK(UnownPicPointers)
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.ok
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dec a
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@ -268,12 +271,26 @@ INCBIN "gfx/footprints/wartortle.1bpp"
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Modify `Pokedex_LoadAnyFootprint`:
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```asm
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```diff
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- push hl
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ld e, l
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ld d, h
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ld hl, vTiles2 tile $62
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lb bc, BANK(Footprints), 4
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- lb bc, BANK(Footprints), 2
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+ lb bc, BANK(Footprints), 4
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call Request1bpp
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- pop hl
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-
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- ; Whoever was editing footprints forgot to fix their
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- ; tile editor. Now each bottom half is 8 tiles off.
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- ld de, 8 tiles
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- add hl, de
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-
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- ld e, l
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- ld d, h
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- ld hl, vTiles2 tile $64
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- lb bc, BANK(Footprints), 2
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- call Request1bpp
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```
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@ -341,10 +358,19 @@ Move `ITEM_C3` and `ITEM_DC` above all the TMs in every table of item data.
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Modify engine/items/items.asm:
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```asm
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```diff
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GetTMHMNumber::
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; Return the number of a TM/HM by item id c.
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ld a, c
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-; Skip any dummy items.
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- cp ITEM_C3 ; TM04-05
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- jr c, .done
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- cp ITEM_DC ; TM28-29
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- jr c, .skip
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- dec a
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-.skip
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- dec a
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-.done
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sub TM01
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inc a
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ld c, a
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@ -353,6 +379,16 @@ GetTMHMNumber::
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GetNumberedTMHM:
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; Return the item id of a TM/HM by number c.
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ld a, c
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-; Skip any gaps.
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- cp ITEM_C3 - (TM01 - 1)
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- jr c, .done
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- cp ITEM_DC - (TM01 - 1) - 1
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- jr c, .skip_one
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-.skip_two
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- inc a
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-.skip_one
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- inc a
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-.done
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add TM01
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dec a
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ld c, a
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