Quick Research & Development Thread

[eildonp]

[FR] A friend told me he figured out how to switch between world maps in the fly menu in Fire Red, just like the town map menu.
This allows you to fly between the world maps.

Just replace the first two bytes at 0xC004C with 00 00, this will make the switch button appear above the cancel button.

He hasn't fully checked for possible bugs, however he believes there is none.

Edit: The switch button works exactly the same way as the town map one, meaning you must unlock it first.

 

[Criminon]

Remove Mail Data from Items [FR]

Hello Everyone,

I started the process to remove Mail items from my game, and I noticed something odd. Even when removing all of the Mail data from the items, and essentially turning them into held items, the game still recognized them as Mail.

I'm assuming there is a table somewhere with these. Using the link below, I have looked through the hex to try to find any errors with the program I was using to edit:

Item Data Structure Gen III

[S-HIGHLIGHT]C0 E9 E6 00 CA D5 E8 D7 DC FF E9 E6 FF 00 82 00 F4 01 00 00 60 6B 3D 08 00 00 01 04 39 22 0A 08 00 00 00 00 00 00 00 00 00 00 00 00[/S-HIGHLIGHT]

This is the item below. Nothing in here links back to mail, however it still displays the mail icon, etc. I have also tried also searching for a table, unfortunately with no luck.





EDIT:

Placing [S-HIGHLIGHT]C0 46 C0 46 C0 46 C0 46 C0 46 C0 46 C0 46 C0 46[/S-HIGHLIGHT] at 980FA will completely remove the check for Mail Items making these act as normal items. (Items 0x79 - 0x84 will then be cleared up and function as standard items)

Credits to Skeli for finding this. (Thank you man!)

 

[rubenturen]

gen vi exp share system (em):

4A4BE - 02 21
4A594 - 01 22
4A634 - 01 20

ok this should be finalized
no more crap from me ahaha

This may be a old post but I have a problem

It works but all the other Pokemon get 0 exp

 

[Caption Faclon]

Disable Item Usage [EM]
At 0x31BC10, put 05 B9

 

[BluRose]

This may be a old post but I have a problem

It works but all the other Pokemon get 0 exp

like it awards them the exp but then you look at it outside of the battle, and it shows that no pokemon were awarded exp?

 

[rubenturen]

like it awards them the exp but then you look at it outside of the battle, and it shows that no pokemon were awarded exp?

no, it shows (inside the battle) that the others than the ones you used got 0 exp.
but it did show that it got exp just it sayed 0.

 

[DemICE]

so I've been looking at the contents and... do we really not know the offset for Fire Red's experience gain formula? there is for Emerald but not for Fire Red. All i need is add a multiplier to it xd

 

[Super Versekr Dark]

Remove Mail Data from Items [FR]

Hello Everyone,

I started the process to remove Mail items from my game, and I noticed something odd. Even when removing all of the Mail data from the items, and essentially turning them into held items, the game still recognized them as Mail.

I'm assuming there is a table somewhere with these. Using the link below, I have looked through the hex to try to find any errors with the program I was using to edit:

Item Data Structure Gen III

[S-HIGHLIGHT]C0 E9 E6 00 CA D5 E8 D7 DC FF E9 E6 FF 00 82 00 F4 01 00 00 60 6B 3D 08 00 00 01 04 39 22 0A 08 00 00 00 00 00 00 00 00 00 00 00 00[/S-HIGHLIGHT]

This is the item below. Nothing in here links back to mail, however it still displays the mail icon, etc. I have also tried also searching for a table, unfortunately with no luck.





EDIT:

Placing [S-HIGHLIGHT]C0 46 C0 46 C0 46 C0 46 C0 46 C0 46 C0 46 C0 46[/S-HIGHLIGHT] at 980FA will completely remove the check for Mail Items making these act as normal items. (Items 0x79 - 0x84 will then be cleared up and function as standard items)

Credits to Skeli for finding this. (Thank you man!)

Remove Mail Data from Items [Ruby]

A2F2E: C0 46 C0 46 C0 46 C0 46 C0 46 C0 46 C0 46 C0 46

 

[Super Versekr Dark]

Adding New Evolution Methods[Ruby]

Spoiler:

Based on:

https://www.pokecommunity.com/posts/8487017/

FR: 0x42FC0

Ruby: 0x3F588

--------------------------------------------------

Limiter:

FR: 0x42FAA

Ruby: 0x3F574

--------------------------------------------------

Table:

FR: 0x42FC4

Ruby: 0x3F58C

copy 3C bytes

--------------------------------------------------

Routine by FamiliaWerneck:

Spoiler:

.text
.align 2
.thumb
.thumb_func
.global LevelItemEvo

Main:
mov r0, r8
mov r5, r2
mov r10, r3
bl Decrypt
mov r2, r5
mov r5, #0x0
mov r3, r10
mov r10, r0
add r0, r6, r7
lsl r0, r0, #0x3
add r0, r2, r0
add r1, r0, r3
ldrb r0, [r1, #0x2]
mov r2, r10
mov r10, r1

Level10:
mov r1, r9
cmp r1, #0x9
bhi Level10SilverPowder
Level12:
cmp r1, #0xB
bhi Level12BeigeBelt
Level20:
cmp r1, #0x13
bhi Level20DeepSeaTooth
Level30:
cmp r1, #0x1D
bhi Level30RazorFang
Level40:
cmp r1, #0x27
bhi Level40Magnet
Level50:
cmp r1, #0x31
bhi Level50MetalCoat
mov r2, #0x0
b ArgumentCheck

Level10SilverPowder:
cmp r2, #0xBC
bne Level10PoisonBarb
mov r2, #0x1
b ArgumentCheck
Level10PoisonBarb:
cmp r2, #0xD3
bne Level12
mov r2, #0x2
b ArgumentCheck

Level12BeigeBelt:
cmp r2, #0xItemId
bne Level12RedBelt
mov r2, #0x3
b ArgumentCheck
Level12RedBelt:
cmp r2, #0xItemId
bne Level12BlueBelt
mov r2, #0x4
b ArgumentCheck
Level12BlueBelt:
cmp r2, #0xItemId
bne Level12OvalStone
mov r2, #0x5
b ArgumentCheck
Level12OvalStone:
cmp r2, #0xItemId
bne Level20
mov r2, #0x6
b ArgumentCheck

Level20DeepSeaTooth:
cmp r2, #0xC0
bne Level20DeepSeaScale
mov r2, #0x7
b ArgumentCheck
Level20DeepSeaScale:
cmp r2, #0xC1
bne Level30
mov r2, #0x8
b ArgumentCheck

Level30RazorFang:
cmp r2, #0xItemId
bne Level30RazorClaw
mov r2, #0x9
b ArgumentCheck
Level30RazorClaw:
cmp r2, #0xItemId
bne Level30MetalCoat
mov r2, #0xA
b ArgumentCheck
Level30MetalCoat:
cmp r2, #0xC7
bne Level30UpGrade
mov r2, #0xB
b ArgumentCheck
Level30UpGrade:
cmp r2, #0xDA
bne Level30KingRock
mov r2, #0xC
b ArgumentCheck
Level30KingRock:
cmp r2, #0xBB
bne Level30WhippedDream
mov r2, #0xD
b ArgumentCheck
Level30WhippedDream:
cmp r2, #0xItemId
bne Level30Sachet
mov r2, #0xE
b ArgumentCheck
Level30Sachet:
cmp r2, #0xItemId
bne Level40
mov r2, #0xF
b ArgumentCheck

Level40Magnet:
cmp r2, #0xD0
bne Level40DragonScale
mov r2, #0x10
b ArgumentCheck
Level40DragonScale:
cmp r2, #0xC9
bne Level40MetalCoat
mov r2, #0x11
b ArgumentCheck
Level40MetalCoat:
cmp r2, #0xC7
bne Level40Electirizer
mov r2, #0x12
b ArgumentCheck
Level40Electirizer:
cmp r2, #0xItemId
bne Level40Magmarizer
mov r2, #0x13
b ArgumentCheck
Level40Magmarizer:
cmp r2, #0xItemId
bne Level40ReaperCloth
mov r2, #0x14
b ArgumentCheck
Level40ReaperCloth:
cmp r2, #0xItemId
bne Level40KingRock
mov r2, #0x15
b ArgumentCheck
Level40KingRock:
cmp r2, #0xBB
bne Level40DubiousDisc
mov r2, #0x16
b ArgumentCheck
Level40DubiousDisc:
cmp r2, #0xItemId
bne Level40PrismScale
mov r2, #0x17
b ArgumentCheck
Level40PrismScale:
cmp r2, #0xItemId
bne Level50
mov r2, #0x18
b ArgumentCheck

Level50MetalCoat:
cmp r2, #0xC7
bne Level50Protector
mov r2, #0x19
b ArgumentCheck
Level50Protector:
cmp r2, #0xItemId
bne WrongItem
mov r2, #0x1A
b ArgumentCheck

Decrypt:
mov r1, #0xC
ldr r2, DecryptPoke
bx r2

WrongItem:
mov r2, #0x0
b ArgumentCheck

ArgumentCheck:
mov r1, r10
mov r10, r5
cmp r0, r2
bne NoEvo
b Evo

NoEvo:
ldr r2, NoEvolution
mov pc, r2

Evo:
ldrh r0, [r1, #0x4]
ldr r2, Evolution
mov pc, r2

.align 2
NoEvolution: .word 0x0803F726
Evolution: .word 0x0803F7A4
DecryptPoke: .word 0x0803CB61

Male:

Spoiler:

main:
push {r0-r7}
add r0, r6, r7
lsl r0, r0, #0x3
add r0, r2, r0
add r3, r0, r3
ldrb r2, [r3, #0x2]
mov r0, r8
bl decrypt2
mov r11, r0
pop {r0-r7}
mov r1, r11
cmp r1, r2
blt exit
mov r0, r8
mov r1, #0xFF
ldr r0, [r0, #0x0]
and r1, r0
mov r0, r8
bl decrypt
mov r11, r0
pop {r0-r7}
mov r5, r11
ldr r2, pokemondata
mov r4, #0x1C
mul r5, r4
add r5, r5, r2
ldrb r5, [r5, #0x10]
cmp r1, r5
blt exit
mov r10, r3
pop {r0-r7}
mov r1, r10
ldr r0, levelcheckloc
bx r0
exit: pop {r0-r7}
ldr r0, noevo
bx r0
decrypt: push {r0-r7}
mov r1, #0xB
ldr r2, decryptpoke
bx r2
decrypt2: push {r0-r7}
mov r1, #0x38
ldr r2, decryptpoke
bx r2
.align
levelcheckloc: .word 0x0803F62D
noevo: .word 0x0803F727
decryptpoke: .word 0x0803cb61
pokemondata: .word 0x081FEC18*

Pokemon Data: change offset if expanded

Female:

Spoiler:

main:
push {r0-r7}
add r0, r6, r7
lsl r0, r0, #0x3
add r0, r2, r0
add r3, r0, r3
ldrb r2, [r3, #0x2]
mov r0, r8
bl decrypt2
mov r11, r0
pop {r0-r7}
mov r1, r11
cmp r1, r2
blt exit
mov r0, r8
mov r1, #0xFF
ldr r0, [r0, #0x0]
and r1, r0
mov r0, r8
bl decrypt
mov r11, r0
pop {r0-r7}
mov r5, r11
ldr r2, pokemondata
mov r4, #0x1C
mul r5, r4
add r5, r5, r2
ldrb r5, [r5, #0x10]
cmp r1, r5
bge exit
mov r10, r3
pop {r0-r7}
mov r1, r10
ldr r0, levelcheckloc
bx r0
exit: pop {r0-r7}
ldr r0, noevo
bx r0
decrypt: push {r0-r7}
mov r1, #0xB
ldr r2, decryptpoke
bx r2
decrypt2: push {r0-r7}
mov r1, #0x38
ldr r2, decryptpoke
bx r2
.align
levelcheckloc: .word 0x0803F62D
noevo: .word 0x0803F727
decryptpoke: .word 0x0803cb61
pokemondata: .word 0x081FEC18*

Pokemon Data: change offset if expanded

Move:

Spoiler:

.text
.align 2
.thumb
.thumb_func
.global Evomove

main:
push {r0-r7}
add r0, r6, r7
lsl r0, r0, #0x3
add r0, r2, r0
add r3, r0, r3
ldrh r2, [r3, #0x2]
mov r0, r8
mov r5, #0x0
loop:
mov r1, #0xD
add r1, r1, r5
bl decrypt
mov r11, r0
pop {r0-r7}
mov r1, r11
cmp r1, r2
beq true
cmp r5, #0x3
beq exit
add r5, #0x1
b loop

decrypt:
push {r0-r7}
ldr r2, decryptpoke
bx r2
true:
mov r9, r3
pop {r0-r7}
mov r1, r9
ldr r0, levelcheckloc
bx r0
exit:
pop {r0-r7}
ldr r0, noevo
bx r0

.align
levelcheckloc: .word 0x0803F62D
noevo: .word 0x0803F727
decryptpoke: .word 0x0803cb61

 

[Super Versekr Dark]

EV-enhancing items (Power Items)[Ruby]
[/SIZE]

The routine now does not require any new Held Effect Item Byte. The new power items are tied to Macho Brace's Held Item Effect Byte. (Thanks to MrDollSteak for giving the idea.)
The type of EV gain is now differentiated by the Second Held Effect Byte (the byte just after the Primary Held Effect Byte in the Item Table).
There is no need to code the Speed Drop explicitly for Power Items.

Usage is now like this by using the following parameters in the Item Table:
Primary Byte | Secondary Byte | Item Name
0x18 | 0x0 | Macho Brace
0x18 | 0x1 | Power Weight
0x18 | 0x2 | Power Bracer
0x18 | 0x3 | Power Belt
0x18 | 0x4 | Power Anklet
0x18 | 0x5 | Power Lens
0x18 | 0x6 | Power Band

Also, there are additional byte changes mentioned in the Spoiler to limit the EVs for each stat from 255 to 252 to avoid wastage of EVs by normal battling.

For Ruby:

Spoiler:

.text
.align 2
.thumb
.thumb_func

Main:
push {r2}
mov r0, r8 /*Load pokemon slot no*/
mov r1, #0xC
mov r2, #0x0
bl Decrypter /* Load pokemon's item */
lsl r0, r0, #0x10
lsr r0, r0, #0x10
pop {r2} /* Restore Pokerus Factor*/
cmp r0, #0xAF
beq EnigmaBerry
add r3, r0, #0x0
bl GetItemEffect /* Get Held Item's Effect Byte*/
lsl r0, r0, #0x18
lsr r0, r0, #0x18
cmp r0, #0x18
bne NoPowerItem
add r0, r3, #0x0
bl GetSecondEffectByte
lsl r0, r0, #0x18
lsr r0, r0, #0x18
cmp r0, #0x0
beq MachoBrace
add r1, r6, #0x1 /*Load a Power Item's Secondary Effect Byte*/
cmp r1, r0 /*Match items*/
bne NoPowerItem /*No Power Item or No Match for that particular stat*/
lsl r2, r2, #0x2
add r4, r4, r2 /* Add 4 EVs or 8 (due to Pokerus) */
NoPowerItem:
ldr r3, =0x0803FFB9
bx r3

EnigmaBerry:
ldr r3, =0x0803FF6F
bx r3

MachoBrace:
ldr r3, =0x0803FFB5
bx r3

Decrypter:
ldr r3, =0x0803CB61
bx r3

GetItemEffect:
ldr r1, =0x080A993D
bx r1

GetSecondEffectByte:
ldr r1, =0x080A9961
bx r1

/*At 3FF58: 04 1C 54 43 00 49 08 47 XX+1 XX XX 08 00 00 00 00 00 00 00 00 00 00*/
/*At 3FFDC && 3FFE2: FC to limit EV growth for each stat to 252 */

 

[tkim]

Soul Dew works in the Battle Frontier for Lati@s :

C0 46 C0 46 at 0x806979E & 0x80697D4

Has anybody tested this? I couldn't understand the routines.

 

[MobAcc]

Does anyone know how to change the world maps for maps 2-4 in fire red?

 

[Voliol]

The newdex order in Crystal(U) is at offset 40D60.

 

[RichterSnipes]

I don't know if this has been posted before, but whatevs. It came to my attention today that the bag in FireRed crashes if a "main" pocket has more than 42 items (the normal max for regular items). I had always assumed the malloc was done based on a multiple of the numbers inputted at the routine beginning 0x08099E44, because the TM pocket works fine even with over 100 items, but apparently the berry/TM cases mean they run off of something different. Anyhow, to allow for sufficient malloc requests, change ".equ largest_pocket_size" to your new max and insert this:

Spoiler:

.equ largest_pocket_size,	CHANGE THIS LINE
.equ largest_pocket_size_plus_one, largest_pocket_size + 1
.equ strings_size,	largest_pocket_size_plus_one * 19

.org 0x08002B9C
malloc:
	push {lr}
	mov r1, r0

.org 0x081083F4
main:
	push {r4, lr}
	ldr r4, =(0x0203AD18)
	mov r0, #largest_pocket_size_plus_one
	lsl r0, r0, #0x3
	bl malloc
	str r0, [r4, #0x0]
	cmp r0, #0x0
	beq return
	ldr r0, =strings_size
	bl malloc
	str r0, [r4, #0x4]
	cmp r0, #0x0
	beq return
	mov r0, #0x1

return:
	pop {r4}
	pop {r1}
	bx r1

EDIT: I haven't done much testing. I've only thrown like 60 items into the general items pocket before I got bored & assumed this routine was the only problem.

Info on 0x08099E44: https://www.pokecommunity.com/posts/9014911/

Does this modification have any notable side effects? And what limits does it have? I can't imagine that it's a no-strings-attached enhancement. The more in-depth bag expansion codes in the ASM Resource Thread either take over space dedicated for the "Previously" system or rewrite the save function altogether to utilize JPAN's Save Block Recycle hack.

 

[dGxx]

Hi everyone, I got a quick question I'm sure after all these years you might have an answer. I'll try to make it as small as possible. Here it is:

I wanna be able to give whatever pokemon I choose to a person and or whatever is on my top slot, and that person will give me another one right back. For example, I want to give a person my charizard and I want that person to give me back another Charizard with obviously different stats, I have an idea on how to implement it on my hack, i just dont know how i could script it or what or which vars to use. Thanks guys

 

[Voliol]

@dGxx what game are you using as your base?

Either way here are the indexes for your team data in the gen III games: https://bulbapedia.bulbagarden.net/wiki/Pokémon_data_structure_in_Generation_III#Data_location
The part of the Pokémon data that has the species id is hidden behind encryption though, so you'll have to unencrypt it. Dunno exactly how to do that, parts of the solution might be on this page: https://bulbapedia.bulbagarden.net/wiki/Pokémon_data_substructures_in_Generation_III

 

[Voliol]

The newdex order in Crystal(U) is at offset 40D60.

Here is a fuller list, I don't think I've missed any:

Spoiler:

Gold(U): 40D60
Silver(U): 40D60
Crystal(U): 40D60

Gold(JP): 40C2C
Silver(JP): 40C2C
Crystal(JP): 40C2C

Gold(G): 40D5A
Silver(G): 40D5A
Crystal(G): 40D59

Gold(F): 40D68
Silver(F): 40D68
Crystal(F): 40D68

Gold(ES): 40D62
Silver(ES): 40D62
Crystal(ES): 40D64

Gold(I): 40D71
Silver(I): 40D71
Crystal(I): 40D71

Note that German and Spanish Crystal have different offsets from their corresponding GS pair, otherwise the offset within a given language is all the same.

 

[Peter_BimBals]

Disable "The Pokemon Stopped Evolving." [FR]

FR has a feature that if you attempt to evolve a Pokemon into something not in the Kanto Dex (and you don't have the National Dex), it will mysteriously stop evolving. You could just give the player the National Dex at the beginning of the game, but if you don't want to do that, you can easily disable this.

Basically, this will turn some conditional jumps into unconditional jumps, and remove some checks. No free space required.

0x08043156: 02 E0
0x080CE90C: 1C E0
0x080CF566: 17 E0
0x08126C26: C0 46 C0 46 C0 46 C0 46
0x08126C4C: 08 E0

The code explaining the above byte changes is:

Spoiler:

.gba
.thumb
.open "firered.gba", 0x8000000

// trade item removal
.org 0x08043156
b 0x0804315E

// all three
.org 0x080CE90C
b 0x080CE948

// trade
.org 0x080CF566
b 0x080CF598

// stone
.org 0x08126C26
nop
nop
nop
nop

// stone
.org 0x08126C4C
b 0x08126C60

.close

Hey, I'm new at coding and whilst making a minor edit hack for Pokemon Leaf Green, I had a few questions regarding this; Firstly, and this might be a dumb question, am I able to simply change out the text from firered to leafgreen? Secondly, where would I put this script? I've only writen one script and have had only a few days of experience in writing scripts. Thank you in advance ~

 

[Zeturic]

Disable "The Pokemon Stopped Evolving." [FR]

FR has a feature that if you attempt to evolve a Pokemon into something not in the Kanto Dex (and you don't have the National Dex), it will mysteriously stop evolving. You could just give the player the National Dex at the beginning of the game, but if you don't want to do that, you can easily disable this.

Basically, this will turn some conditional jumps into unconditional jumps, and remove some checks. No free space required.

0x08043156: 02 E0
0x080CE90C: 1C E0
0x080CF566: 17 E0
0x08126C26: C0 46 C0 46 C0 46 C0 46
0x08126C4C: 08 E0

The code explaining the above byte changes is:

Spoiler:

.gba
.thumb
.open "firered.gba", 0x8000000

// trade item removal
.org 0x08043156
b 0x0804315E

// all three
.org 0x080CE90C
b 0x080CE948

// trade
.org 0x080CF566
b 0x080CF598

// stone
.org 0x08126C26
nop
nop
nop
nop

// stone
.org 0x08126C4C
b 0x08126C60

.close

Hey, I'm new at coding and whilst making a minor edit hack for Pokemon Leaf Green, I had a few questions regarding this; Firstly, and this might be a dumb question, am I able to simply change out the text from firered to leafgreen? Secondly, where would I put this script? I've only writen one script and have had only a few days of experience in writing scripts. Thank you in advance ~

It's not a script, it's ASM written for armips. But beyond that, I wasn't expecting people to literally assemble the code with armips, you would just make the listed byte changes in a hex editor (the armips code does exactly those byte changes); it was just there as an explanation and documentation.

LG's offsets are not the same as FR. To port it from FR to LG, you'd have to find the LG equivalent of each FR offset listed (0x08043156, 0x080CE90C, etc). I don't know the LG equivalents, and I have no inclination to look them up. Nobody hacks or researches LG because there's really no point; you could turn FR into a clone of LG with minimal effort and from a gameplay perspective that'd be identical but you're not needlessly handicapping yourself by actually starting from LG. If you want to use a Kanto-based game as your base, I strongly advise that you use FR.

 

[Peter_BimBals]

Alright, Thank you for responding. Truth be told, I just had the LG ROM already on my computer and wanted to mess around with it, I didn't know the two were different beyond version exclusives and title screen. I'll try looking it up because I've put in a bit of work already, but if I can't find anything I'll get an FR ROM and start over. That much shouldn't be too hard.