Glitchfinder
Let's all get along, please?
- 477
- Posts
- 17
- Years
- Age 34
- The Twilight Zone
- Seen May 4, 2014
This tutorial was translated from the tutorial at the German site ROM Hacker's World.
Egg Moves
The attacks that are transferred by breeding, are found in a list according to the following pattern:
[Pokémon1][Attack1][Attack2]... [Pokémon2][Attack1]...
It puts the first digit in 3 or more digit references after the last two digits. (Thus having two bytes for every attack)
Example: Geodude
The data would look like this:
[ 6A4E][0500][9D00][4F01 ]
First word (at 20074 in the ROM) indicates that it concerns Geodude. On The following indicates the learnable attacks:
0500 - > 5 = Mega Punch
9D00 - > 9D = Rock Slide
4F01 - > 14F = Block
Learnable TMs/HMs
This actually does very little since Gold/Silver. The data is only accommodated through special means, not through Pokémon data.
8 bytes are assigned to each Pokémon:
[TMs 8-1][TMs 16-9][TMs 24-17][TMs 32-25][TMs 40-33][TMs 48-41][HMS 6-1 and TMs 50-49][6 zero-bytes and HMs 8-7 ]
Pay attention to the fact that the sequence is in descending order within the bytes. For example, byte 1 looks like this:
[ TM8, TM7, TM6, TM5, TM4, TM3, TM2, TM1 ]
If the bit is a 1, then the Pokémon can learn the TM/HM.
Example: Bulbasaur
The first byte of Bulbasaur is [00100000].
With this information, you can see that of the first 8 TMs, Bulbasaur only learns TM6, Toxic.
Attacks Learnable by Leveling Up
The level-up attacks that Pokémon learn are stored in an easily compressed form. (OK, it isn't really compression, is only a little tightly squeezed)
Every attack has the level it was learned, in two bytes. Any one Pokémon has it's attacks separated from those of others by two bytes that form FFFF, like this:
[Attack1][Attack2][Attack3]...[FFFF]
(There isn't anything there that you can see about which Pokémon learns the attacks. The lists are in the order of the Pokémon within the ROM's hexadecimal list.)
This is how you will see the attacks listed where you can edit them:
[byte2: L64, L32, L16, L8, L4, L2, L1, A256][byte1: A128, a64, a32, a16, a8, a4, a2, a1 ]
All L-bits show the level, all A-bits show the attack ID.
Example: Treecko
First word [ 0102 ] is turned and converted then into the following:
- > 0201 - > 0000001 000000001
The seven bits indicate the level, which, in this example, is level 1. The attack results from the nine following bits, where 1=Pound. Thus, Treecko learns Pound at level 1.
Egg Moves
The attacks that are transferred by breeding, are found in a list according to the following pattern:
[Pokémon1][Attack1][Attack2]... [Pokémon2][Attack1]...
It puts the first digit in 3 or more digit references after the last two digits. (Thus having two bytes for every attack)
Example: Geodude
The data would look like this:
[ 6A4E][0500][9D00][4F01 ]
First word (at 20074 in the ROM) indicates that it concerns Geodude. On The following indicates the learnable attacks:
0500 - > 5 = Mega Punch
9D00 - > 9D = Rock Slide
4F01 - > 14F = Block
Learnable TMs/HMs
This actually does very little since Gold/Silver. The data is only accommodated through special means, not through Pokémon data.
8 bytes are assigned to each Pokémon:
[TMs 8-1][TMs 16-9][TMs 24-17][TMs 32-25][TMs 40-33][TMs 48-41][HMS 6-1 and TMs 50-49][6 zero-bytes and HMs 8-7 ]
Pay attention to the fact that the sequence is in descending order within the bytes. For example, byte 1 looks like this:
[ TM8, TM7, TM6, TM5, TM4, TM3, TM2, TM1 ]
If the bit is a 1, then the Pokémon can learn the TM/HM.
Example: Bulbasaur
The first byte of Bulbasaur is [00100000].
With this information, you can see that of the first 8 TMs, Bulbasaur only learns TM6, Toxic.
Attacks Learnable by Leveling Up
The level-up attacks that Pokémon learn are stored in an easily compressed form. (OK, it isn't really compression, is only a little tightly squeezed)
Every attack has the level it was learned, in two bytes. Any one Pokémon has it's attacks separated from those of others by two bytes that form FFFF, like this:
[Attack1][Attack2][Attack3]...[FFFF]
(There isn't anything there that you can see about which Pokémon learns the attacks. The lists are in the order of the Pokémon within the ROM's hexadecimal list.)
This is how you will see the attacks listed where you can edit them:
[byte2: L64, L32, L16, L8, L4, L2, L1, A256][byte1: A128, a64, a32, a16, a8, a4, a2, a1 ]
All L-bits show the level, all A-bits show the attack ID.
Example: Treecko
First word [ 0102 ] is turned and converted then into the following:
- > 0201 - > 0000001 000000001
The seven bits indicate the level, which, in this example, is level 1. The attack results from the nine following bits, where 1=Pound. Thus, Treecko learns Pound at level 1.