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Pokémon 3rd Generation/Pokémon FireRed and LeafGreen/ROM map
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The following article is a ROM map for Pokémon 3rd Generation/Pokémon FireRed and LeafGreen.
General pointers
| Offset | Pointer | Comment |
|---|---|---|
| 08000128 | 082350AC | Pointer to graphic table, which contains pointers to front pokemon images. |
| 0800012C | 0823654C | Pointer to graphic table, which contains pointers to back pokemon images. |
| 08000130 | 0823730C | Pointer to palette table, which contains pointers to normal palettes for pokemon images. |
| 08000134 | 082380CC | Pointer to palette table, which contains pointers to shiny palettes for pokemon images. |
Hex address to wild Pokemon
NOTE: This hacking I test in EUROPE (Spanish) version games.
Go to 3C438C address corresponding to Route 101 at the beginning of the game.
Then, in these address change the wild pokemon code, with the hex pokemon code that you like appear.
Hex address to Poke Market in first town
NOTE: This hacking I test in EUROPE (Spanish) version games.
Go to 16A30C address showing the codes first town.
Then you can change the code of first item that they sell you, to other code, for example a MasterBall (code 0100).
Copy array from a RAM address to another
- arguments:
- r0 = copy_destination
- r1 = copy_source
- r2 = number_of_bytes_to_copy
08008DD0 B570 push r4-r6,r14 ; 08008DD2 1C04 mov r4,r0 ;r4 = copy_destination 08008DD4 1C0E mov r6,r1 ;r6 = copy_source 08008DD6 0612 lsl r2,r2,18h ; 08008DD8 0E15 lsr r5,r2,18h ;r5 = number_of_bytes_to_copy; max length is 255 08008DDA 2300 mov r3,0h ;current_byte = 0 08008DDC 1C28 mov r0,r5 ;r0 = number_of_bytes_to_copy 08008DDE 4283 cmp r3,r0 ; 08008DE0 D209 bcs Lxx_8008DF6h ;if(number_of_bytes_to_copy == 0), exit this function 08008DE2 1C02 mov r2,r0 ;r2 = number_of_bytes_to_copy 08008DE4 18E1 add r1,r4,r3 ;r1 = copy_destination + current_byte 08008DE6 18F0 add r0,r6,r3 ;r0 = copy_source + current_byte 08008DE8 7800 ldrb r0,[r0] ;load byte to copy 08008DEA 7008 strb r0,[r1] ;store copied byte in destination 08008DEC 1C58 add r0,r3,1 ; 08008DEE 0400 lsl r0,r0,10h ; 08008DF0 0C03 lsr r3,r0,10h ;current_byte++ 08008DF2 4293 cmp r3,r2 ; 08008DF4 D3F6 bcc Lxx_8008DE4h ;loop until the number_of_bytes_to_copy have been copied 08008DF6 1960 add r0,r4,r5 ;r0 = copy_destination + number_of_bytes_to_copy 08008DF8 BC70 pop r4-r6 ; 08008DFA BC02 pop r1 ; 08008DFC 4708 bx r1 ;
Pokémon in Old Man Tutorial
In US 1.1, 0x7F8A0 contains the Pokémon ID, 0x7F8A2 the level, the instructions at 0x7F8B4 sets the battle type to OLD_MAN_TUTORIAL.
If you try to set the Pokémon ID to a genderless Pokémon, you will softlock unless you change the check done on r0 ≠ 0 and the bne at 0x3DF54 after the call of func_3F7A0.
Check if Pokémon is male, female, or genderless
0x3F7A0- Retrieves Pokémon gender ratio, checks if always male, always female or genderless, then checks pid to determine if male or female- arguments:
- r0 = pokemon_id
- r1 = pid
- returns:
- r0 = 0x0 if male; 0xFE if female; 0xFF if genderless
0803F7A0 B500 push r14 ; 0803F7A2 1C0B mov r3,r1 ;r3 = pokemon_pid 0803F7A4 0400 lsl r0,r0,10h ; 0803F7A6 0C02 lsr r2,r0,10h ;r2 = pokemon_id 0803F7A8 490C ldr r1,=Lxx_82547F4h ;r1 = pointer_to_pokemon_data 0803F7AA 00D0 lsl r0,r2,3h ; 0803F7AC 1A80 sub r0,r0,r2 ; 0803F7AE 0080 lsl r0,r0,2h ;r0 = pokemon_id × 28 0803F7B0 1840 add r0,r0,r1 ;r0 = pointer_to_pokemon_datum 0803F7B2 7C00 ldrb r0,[r0,10h] ;r0 = pokemon_gender_ratio 0803F7B4 2800 cmp r0,0h ; 0803F7B6 D014 beq Lxx_803F7E2h ;if (pokemon_always_male), exit this function 0803F7B8 2800 cmp r0,0h ; 0803F7BA DB03 blt Lxx_803F7C4h ; 0803F7BC 28FF cmp r0,0FFh ; 0803F7BE DC01 bgt Lxx_803F7C4h ; 0803F7C0 28FE cmp r0,0FEh ; 0803F7C2 DA0E bge Lxx_803F7E2h ;if (pokemon_always_female || pokemon_is_genderless), exit this function 0803F7C4 00D0 lsl r0,r2,3h ; 0803F7C6 1A80 sub r0,r0,r2 ; 0803F7C8 0080 lsl r0,r0,2h ;r0 = pokemon_id × 28 0803F7CA 1840 add r0,r0,r1 ;r0 = pointer_to_pokemon_datum 0803F7CC 7C01 ldrb r1,[r0,10h] ;r1 = pokemon_gender_ratio 0803F7CE 20FF mov r0,0FFh ; 0803F7D0 4018 and r0,r3 ;r0 = 0xFF & pokemon_pid 0803F7D2 4281 cmp r1,r0 ; 0803F7D4 D804 bhi Lxx_803F7E0h ;if (pokemon_is_female), r0 = 0xFE, and exit this function 0803F7D6 2000 mov r0,0h ;else r0 = 0 0803F7D8 E003 b Lxx_803F7E2h ;exit this function 0803F7DA 0000 lsl r0,r0,0h ; 0803F7DC 082547F4 ;(pointer_to_pokemon_data) 0803F7E0 20FE mov r0,0FEh ;r0 = 0xFE 0803F7E2 BC02 pop r1 ; 0803F7E4 4708 bx r1 ;
Rival name selection
081303B2 0600 lsl r0,r0,18h ; 081303B4 1604 asr r4,r0,18h ;r4 = cursor_position 081303B6 2C00 cmp r4,0h ; 081303B8 D022 beq Lxx_8130400h ;to Name Entry screen 081303BA 2C00 cmp r4,0h ; 081303BC DD30 ble Lxx_8130420h ;Player didn't validate a choice yet; exit this function 081303BE 2C04 cmp r4,4h ;There's only 5 option in the Rival name selection 081303C0 DC2E bgt Lxx_8130420h ;Invalid menu ID I suppose ? Does the same thin as not having selected a choice; exit this function 081303C2 2005 mov r0,5h ;r0 = 5 081303C4 F741FF8C bl Lxx_80722E0h ; 081303C8 7EA8 ldrb r0,[r5,1Ah] ; 081303CA 2101 mov r1,1h ;r1 = 1 081303CC F7DFF8C0 bl Lxx_810F550h ; 081303D0 7EA8 ldrb r0,[r5,1Ah] ; 081303D2 F6D3FD3D bl Lxx_8003E50h ; 081303D6 4808 ldr r0,=Lxx_203B108h ; 081303D8 6800 ldr r0,[r0] ; 081303DA 7C00 ldrb r0,[r0,10h] ; 081303DC 1E61 sub r1,r4,1 ; 081303DE 0609 lsl r1,r1,18h ; 081303E0 0E09 lsr r1,r1,18h ; 081303E2 F001F9F3 bl Lxx_81317CCh ;call Fixed Rival name subroutine 081303E6 2001 mov r0,1h ; 081303E8 83E8 strh r0,[r5,1Eh] ; 081303EA 1C38 mov r0,r7 ; 081303EC 3808 sub r0,8h ; 081303EE 1830 add r0,r6,r0 ; 081303F0 4902 ldr r1,=Lxx_81304DDh ; 081303F2 E014 b Lxx_813041Eh ;exit this function 081303F4 5098 str r0,[r3,r2] ; 081303F6 0300 lsl r0,r0,0Ch ; 081303F8 B108 ???? ; 081303FA 0203 lsl r3,r0,8h ; 081303FC 04DD lsl r5,r3,13h ; 081303FE 0813 lsr r3,r2,20h ; 08130400 2005 mov r0,5h ;r0 = 5 08130402 F741FF6D bl Lxx_80722E0h ; 08130406 2001 mov r0,1h ; 08130408 4240 neg r0,r0 ;r0 = -1 0813040A 9400 str r4,[sp] ; 0813040C 2100 mov r1,0h ; 0813040E 2200 mov r2,0h ; 08130410 2310 mov r3,10h ; 08130412 F740F8C3 bl Lxx_807059Ch ; 08130416 1C38 mov r0,r7 ; 08130418 3808 sub r0,8h ; 0813041A 1830 add r0,r6,r0 ; 0813041C 4902 ldr r1,=Lxx_813042Dh ;Prolly call to Name Entry screen 0813041E 6001 str r1,[r0] ; 08130420 B001 add sp,4h ; 08130422 BCF0 pop r4-r7 ; 08130424 BC01 pop r0 ; 08130426 4700 bx r0 ;
Fixed Rival name subroutine
Call to 0x1317CC at address 0x1303B2 in US 1.1
Internal Data for Pokémon 3rd Generation/Pokémon FireRed and LeafGreen
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