Guides:Goldenrod Glitch Pokédex Mode ACE setup (FR): Difference between revisions

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Revision as of 04:53, 7 December 2023 (view source) TimoVM (talk \| contribs) m (→‎Addendum: Repairing the setup) ← Older edit		Latest revision as of 23:43, 8 December 2023 (view source) TimoVM (talk \| contribs) mNo edit summary
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Line 36: * Obtaining duplicate key items requires obtaining a glitch pokémon that cannot be manually released. * Hatching a $00 species pokémon sets the seen/caught flags for an pokémon species that should not exist. * Duplicate key item swap glitch removes the CANCEL button from the key item pocket. * Buying or obtaining additional poké balls causes issues when done with an extended ball pocket. Line 158 ⟶ 157: The party will now contain two Drowzee/Machop that will both be holding a bicycle each. Take these held items to add them to the bottom of the Key Item list. '''It is now safe to save.''' ===Setting up glitch pokédex mode ACE=== # Arrange the Ball pocket as follows: Line 403 ⟶ 402: \|\| 21 7A D6 2A 23 F6 84 22 AF 21 E1 D5 47 4E 09 23 36 FF 2E FC 36 01 21 0322 DCDA CB4E BE35 2E09 2336 ~~CB BE 21~~FF C9 ~~22 DA 4E 35 09 36 FF C9~~ \|} Line 411 ⟶ 409: # Add a CANCEL button at the end of the key item list. # Set the amount of items in the ball pocket to 1. ~~# Remove the seen/caught flags of the hatched $00 species.~~ # Remove the glitch pokémon at the end of the party. ===Optional: Altering the current Pokédex Mode=== This code will alter the current active Pokédex Mode. By default, it sets the Pokédex Mode to zero, making it possible to use the Pokédex normally again. By changing the value marked in bold, you can change the value that the Pokédex Mode will be set to. You can reactivate Mode 25, the Mode that executes from $~~F8CD~~D8CD onward, by changing the value in bold to $19. {\| class="wikitable" style="margin-left: auto; margin-right: auto; border: none;" Line 466 ⟶ 463: [[File:Box French GS Reset.png]] \|} * Make sure to put the "BOXCODES" nicknamed pokémon in the 2nd party slot. * Write a new mail with the following content: * Use TM25 to execute the code. If the game crashes, double check the box name code and ensure you've performed every step of the process correctly. * If the code executes succesfully, the "MAILWRITER" nicknamed pokémon has now been repaired. =Appendix= ==Plain text transcripts of codes== * Glitch Pokédex mail {\| class="wikitable" style="margin-left: auto; margin-right: auto; border: none;" ! Language !! Mail \| \|- ~~[[File:Mail French GS.png]]~~ ! scope="row" \| French \|\| p 0 ç é 5 4 j' 7 é 4 4 j' é é 6 4 é Mn 2 j' W ♀ j' + 's ç 2 Pk p 0 - 1 \|} * Before using TM25, make sure to re-read the mail. * Setup box name code * Use TM25 to execute the code. If the game crashes, double check the box name code and ensure you've performed every step of the process correctly * If the code executes succesfully, the "MAILWRITER" nicknamed pokémon has now been repaired. {\| class="wikitable" style="margin-left: auto; margin-right: auto; border: none;" ! Language !! Box names \|- ! scope="row"\| French \|\| Box 1: é 5 2 ? O é 2 2 Box 2: n' n' n' n' n' p ♀ Pk Box 3: 0 g ♂ u' s é 6 2 Box 4: ? b é ♀ 2 u' ♂ 5 Box 5: é 3 2 u' t é 0 2 Box 6: é ; 4 p u' 6 ♀ ] Box 7: ♀ ♀ ♀ ♀ ♀ 's 5 5 Box 8: ? ♀ é [ 4 u' x 5 Box 9: é ( 4 H u' z 5 5 Box 10: é : 4 * é ) 4 n' \|} * Reset box name code (Glitch Pokédex Mode) {\| class="wikitable" style="margin-left: auto; margin-right: auto; border: none;" ! Language !! Box names \|- ! scope="row" \| French \|\| Box 1: p u' 6 é ) 4 u' F Box 2: é ; 4 n' n' p ♀ Pk Box 3: 0 g ♂ T é [ 4 5 Box 4: u' X é ( 4 H u' z Box 5: é : 4 n' \|} * Reset box name code (Wrong Pocket TM) {\| class="wikitable" style="margin-left: auto; margin-right: auto; border: none;" ! Language !! Box names \|- ! scope="row" \| French \|\| Box 1: p u' 6 é ) 4 u' F Box 2: é ; 4 u' I é [ 4 Box 3: u' w é ( 4 H u' z Box 4: é : 4 n' \|} ==In-depth explanation of the setup== ===Effect of the glitch pokédex mode=== In the 2nd generation of Pokémon games, the Pokédex offers three different modes of sorting pokémon species (New, Old, A-Z). When the Pokédex is opened, the game checks which mode was last active, then launches a function to sort all species. Since the game needs to know which mode was last active, the last used Pokédex mode is stored in RAM at address $D67E. By swapping an item stack using the extended Ball Pocket, we can directly overwrite the value for the last used mode. When the Pokédex is next opened, the game will read this value and attempt to launch an invalid sorting function depending on the value used, some of which will trigger ACE. For the French versions of Gold & Silver, mode 25 ($19) will trigger ACE from $D8CD onward, which corresponds to the 6th character of the 2nd box name. ===Effect of the mail=== The last read mail is buffered from $CEED onward. Converting the characters from the mail to assembly results in the following, ordered by language: ====French==== <pre> Mail AF xor a ; a = $00 F6 BF or $BF ; a = $BF EA FB FA ld ($FAFB), a D6 FD sub $FD ; a = $C2 EA FA FA ld ($FAFA), a D6 EA sub $EA ; a = $D8 EA FC FA ld ($FAFC), a 4E ld c, (hl) EA B8 D5 ld (wItems), a ; Change first item in main item pocket to TM25 D6 96 sub $96 ; a = $42 F5 push af DE E4 sbc $E4 ; a = $5E, set carry flag DC BF F8 call c, wBoxNames E1 pop hl ; h = $42 AF xor a ; a = $00 F6 E3 or $E3 ; a = $E3 F7 rst30h ; Jump to $10:42E3, final bytes of Pokedex_ReinitDexEntryScreen. This will set $CE63 to $FF, causing immediate exit of Pokédex after return Bootstrap ($FAFA, 5th party pokémon's stat experience) C2 BF D8 jr nz, wBoxNames </pre> ===Effect of the setup box name code=== Converting the characters from box names to assembly results in the following code. Please note that the box name code overwrites part of itself, the translated assembly assumes the code was already used once. The code overwrites part of itself to call the byteFill function. This will fill the area between $D57E and $D5AF with $FF values, setting all 50 TM quantities to 255. Separately, this code overwrites the latter half of party pokémon #5's stat experience data, allowing it to function as a TM25 bootstrap that redirects execution to the Mail Writer. ====French==== <pre> Box 1: $D8BF EA FB F8 ld ($F8FB), a ; a = $5E E6 8E and $8E ; a = $0E EA F9 F8 ld ($F8F9), a 50 ld d, b Box 2: $D8C8 D9 reti D9 reti D9 reti D9 reti D9 reti AF xor a ; Entry point of mode 25, a = $00 F5 push af E1 pop hl ; hl = $0080 50 ld d; b Box 3: $D8D1 F6 A6 or $A6 ; a = $A6 EF rst28h JumpTable; Due to ROM header structure, call $CEEA, three bytes before the last read mail DE B2 sbc $B2 ; a = $31 EA FC F8 ld ($F8FC), a FB ei 50 ld d, b Box 4: $D8DA E6 A1 and $A1 ; a = $21 EA F5 F8 ld ($F8F5), a DE EF sbc $EF ; a = $32, carry flag set FB ei 50 ld d, b Box 5: $D8E3 EA F8 F8 ld ($F8F8), a DE B3 sbc $B3 ; a = $7E EA F6 F8 ld ($FD8F6), a 50 ld d, b Box 6: $D8EC EA 9D FA ld ($FA9D), a AF xor a ; a = $00, carry flag reset DE FC sbc $FC ; a = $04, carry flag set F5 push af 9F sbc a ; a = $FF, carry flag set 21 Box 7: $D8F5 7E F5 ld hl, wTMsHMs 01 32 00 ld bc, $0032 DC 5E 31 call c, byteFill 50 ld d, b Box 8: $D8FE E6 F5 and $F5 ; a = $F5, carry flag reset EA 9E FA ld ($FA9E), a DE B7 sub $B7 ; a = $3E, carry flag reset FB ei 50 ld d, b Box 9: $D907 EA 9A FA ld ($FA9A), a 87 add a ; a = $7C, carry flag reset DE B9 sbc $B9 ; a = $C3, carry flag set FB ei FB ei 50 ld d, b Box 10: $D910 EA 9C FA ld ($FA9C), a F1 pop af ; a = $04, carry flag set EA 9B FA ld ($FA9B), a D9 ret c 50 ld d, b Party pokémon #3's stat experience, starting from $DA9A 3E 04 ld a, $04 C3 7E F5 jp wTMsHMs </pre> ===Effect of the TM code=== Converting the TM quantities to assembly results in the following code. Please note that this code requires a value of $04 in register a in order to properly work. ====French==== <pre> 11 55 DD ld de, $DD55 D5 push de D5 push de ; .nextMail D5 push de 21 2B 62 ld hl, _ComposeMailMessage CF rst08h, FarCall a:hl E1 pop hl D1 pop de 2A ldi a, (hl) ; .continue FE 50 cp $50 38 FB jr c, .continue 28 0A jr z, .terminator 87 add a, a 86 add a, (hl) 12 ld (de), a 13 inc de 23 inc hl 81 add a, c 4F ld c, a 12 ld (de), a 18 EF jr .continue 21 01 C4 ld hl, $C401 ; .screenLoop 4D ld c, l CD 90 3A call PrintBCDNumber.loop 1B dec de ; .goBack CD 3B 37 call JoyTextDelay_ForcehJoyDown BD cp a, l ; l = $04 28 D9 jr z, .nextMail 38 F0 jr c, .displayLoop FE 08 cp $08 C8 ret z 18 F2 jr .goBack </pre> ===Effect of the side effect-fixing code=== When using the Mail Writer, the assembly from this code is directly written and executed as follows: <pre> 21 7A D6 ld hl, $D67A ; Address where the original pokégear flags have been displaced to 2A ldi a, (hl) 23 inc hl F6 84 or $84 ; Ensures that minimal pokégears are restored if $D67A is empty 22 ldi (hl), a AF xor a ; a = $00 21 E1 D5 ld wNumKeyItems ; Current amount of key items in key item pocket 47 ld b, a ; b = $00 4E ld c, (hl) ; Set c to amount of key items 09 add hl, bc 23 inc hl 36 FF ld (hl), $FF ; Restore cancel button to key item pocket 2E FC ld l, $FC ; hl targets wNumBalls 36 01 ld (hl), $01 ; Set current amount of balls in ball pocket to 1 21 22 DA ld hl, wPartyCount 4E ld a, (hl) 35 dec (hl) ; Remove last party pokémon 09 add hl, bc 36 FF ld (hl), $FF ; Re-add proper terminator to party list C9 ret </pre> ===Effect of the pokédex mode-altering code=== When using the Mail Writer, the assembly from this code is directly written and executed as follows: <pre> 3E XX ld a, $XX EA 7E D6 ld (wLastDexMode), a C9 ret </pre> ===Effect of the reset box name code (Glitch Pokédex Mode)=== Converting the characters from box names to assembly results in the following code. This code overwrites the latter half of party pokémon #3's stat experience data, allowing it to function as a TM25 bootstrap that redirects execution to the Mail Writer. ====French==== <pre> Box 1: $D8BF AF xor a ; a = $00, reset carry flag DE FC sbc $FC ; a = $04, set carry flag EA 9B FA ld ($FA9B), a D6 85 sbc $85 ; a = $7E, set carry flag 50 ld d, b Box 2: $D8C8 EA 9D FA ld ($FA9B), a D9 reti D9 reti AF xor a ; Entry point of mode 25, a = $00 F5 push af E1 pop hl ; hl = $0080 50 ld d, b Box 3: $D8D1 F6 A6 or $A6 ; a = $A6 EF rst28h JumpTable; Due to ROM header structure, call $CEEA, three bytes before the last read mail 93 sub e ; a = $F5, set carry flag EA 9E FA ld ($FA9E), a FB ei 50 ld d; b Box 4: $D8DA DE 97 sub $97 ; a = $3E, reset carry flag EA 9A FA ld ($FA9A), a 87 add a, a ; a = $7C, reset carry flag DE B9 sbc $B9 ; a = $C3, set carry flag 50 ld d, b Box 5: $D8E3 EA 9C FA ld ($FA9C), a D9 reti 50 ld d, b Party pokémon #3's stat experience, starting from $DA9A 3E 04 ld a, $04 C3 7E F5 jp wTMsHMs </pre> ===Effect of the reset box name code (Wrong Pocket TM)=== Converting the characters from box names to assembly results in the following code. This code overwrites the latter half of party pokémon #3's stat experience data, allowing it to function as a TM25 bootstrap that redirects execution to the Mail Writer. This code requires a bootstrap pokémon in the 2nd party slot that redirects execution to box names. ====French==== <pre> Box 1: $D8BF AF xor a ; a = $00, reset carry flag DE FC sbc $FC ; a = $04, set carry flag EA 9B FA ld ($FA9B), a D6 85 sbc $85 ; a = $7E, set carry flag 50 ld d, b Box 2: $D8C8 EA 9D FA ld ($FA9B), a DE 88 sbc $88 ; a = $F5, set carry flag EA 9E FA ld ($FA9E), a 50 ld d; b Box 3: $D8D1 DE B6 sub $D6 ; a = $3E, reset carry flag EA 9A FA ld ($FA9A), a 87 add a, a ; a = $7C, reset carry flag DE B9 sbc $B9 ; a = $C3, set carry flag 50 ld d, b Box 4: $D8DA EA 9C FA ld ($FA9C), a D9 reti 50 ld d, b Party pokémon #3's stat experience, starting from $DA9A 3E 04 ld a, $04 C3 7E F5 jp wTMsHMs </pre> [[Category:Guides]]