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Code: ASM Resource Thread

MUGCAP

MUGCAP

Creator of PLA GBA and PKMN F&E Rom Hacks
2
Posts
1
Years
  • Age 24
  • Seen Apr 22, 2024
Blah said:

Changing the Player's Overworld ingame


Intro:

I recently made this routine, it's kind of limited in the sense that you can only be change to 30 different overworlds (excluding the special version of the default characters). While it is limited, I don't really think that that's a problem (you'd probably only be OWs swapping to 2-3 different OWs the entire game anyways, so unless you wanted to player to play as more than 30 characters, this routine will work just fine for you). It's also a little "smaller" in comparison to JPAN's 6 seperate routines which he used (though in his favor, I don't think his limits the amount like mine). I blame the table, it's weird. Actually the whole overworld loading thing is weird..it's done in like 9 places lol.

I should also note that if the OW you're changing to doesn't have a running frame, things are going to look weird when you try to run~

How to insert:

Compile into free space the following routine:
Spoiler:


Now navigate to 0x5CA4C and insert the following byte changes:
Code: 
00 48 00 47 XX XX XX 08
Where XX XX XX is where you inserted this routine +1.


Usage:

The routine requires two conditions to toggle.
1) Flag 0x406 is set
2) Var 0x8000 is not 0xFF

As you may have guessed you need to set variable 0x8000 to a value which matches the overworld you want the player to transform into. Please note that for the effect to happen, you need to warp first.
Here's a list of values and their corresponding sprite to the left:
Spoiler:

While no particular value will cause a crash, I've excluded values which are "repeated" OWs. If you experience bugs, use it in conjunction with the backsprite hack I made. If you still have bugs, report them here!
Click to expand...

I have a small problem. If it is resolved, I will be able to continue the development of my Hack Rom. A bug happens, when I open any menu. The player's Sprite returns to the original (but with the new palette changed by the routine.) I searched a lot but didn't find any solution. I am very grateful if you can help me.
 
ThePuffinMan

ThePuffinMan

Some person who plays games
13
Posts
6
Years
Hello. I've recently got interested in FireRed ROM hacking and I'm trying to make my own ROM hack. I have followed Blah's beginner ASM tutorial about inserting ASM routines into my ROM. I have gone up to the last step of that tutorial where I have to use the "callasm" command and run my routine from my ROM. I spent hours researching online but I cannot find an answer. My query is, how do I insert this ability effect routine into my ROM hack? I am using Mr. DollSteak's ROM base v1.5a, and the routine is adding the abilities Toxic Boost and Flare Boost from the Ability Resource Thread. I am also using karatekid552's THUMB editor. So far, I have tested the compilation, created a .bin file and have inserted the script into my ROM at offset 0xC4F004 because I was told you must reverse the bytes. Assistance is much appreciated, thank you.

The script code is in the spoiler below:

Spoiler:
 
OPPAIDAISUKI

OPPAIDAISUKI

31
Posts
3
Years
Spherical Ice said:

Stats on the Pokédex screen replacing the weight comparison


QMVkkkn.png
LpH11UN.png
8pyCTYQ.png

Code: 
.thumb

@ credits to DoesntKnowHowToPlay and Squeetz

.equ rom, 0x08000000
.equ offset, 0x

.org 0x10611E, 0xFF
	.byte 0x43, 0xE0
	
.org 0x106370, 0xFF
	.byte 0x0, 0x48, 0x0, 0x47
	.word main + rom + 1

.org 0x106530, 0xFF
	.byte 0xCE, 0xE0
	
.org 0x452200, 0xFF
	.byte 0xA

.org offset, 0xFF
main:
    mov r5, #4
    str r5, [sp]
    str r6, [sp, #4]
    mov r0, r10
    cmp r0, #0
    beq unknown_base_stats

hp:
    mov r0, #0
    bl print_stat
    mov r3, #4 @ y co-ord
    str r3, [sp]
    mov r3, #0 @ x co-ord
    ldr r5, write_method
    bl call_via_r5
    
atk:
    mov r0, #1
    bl print_stat
    mov r3, #4 @ y co-ord
    str r3, [sp]
    mov r3, #0x2C @ x co-ord
    ldr r5, write_method
    bl call_via_r5
     
def:
    mov r0, #2
    bl print_stat
    mov r3, #18 @ y co-ord
    str r3, [sp]
    mov r3, #0 @ x co-ord
    ldr r5, write_method
    bl call_via_r5
     
spa:
    mov r0, #4
    bl print_stat
    mov r3, #18 @ y co-ord
    str r3, [sp]
    mov r3, #0x2C @ x co-ord
    ldr r5, write_method
    bl call_via_r5
     
spd:
    mov r0, #5
    bl print_stat
    mov r3, #32 @ y co-ord
    str r3, [sp]
    mov r3, #0 @ x co-ord
    ldr r5, write_method
    bl call_via_r5
     
spe:
    mov r0, #3
    bl print_stat
    mov r3, #32 @ y co-ord
    str r3, [sp]
    mov r3, #0x2C @ x co-ord
    ldr r5, write_method
    bl call_via_r5
    
print_ability_one:
    ldr r0, [sp, #0x1C]
    mov r3, #0x1C
    mul r0, r3
    ldr r1, base_stats
	ldr r1, [r1]
    mov r3, #0x16
    add r1, r1, r3
    add r1, r0, r1
    ldr r3, abilities
	ldr r3, [r3]
    ldrb r2, [r1]
    mov r1, #0xD
    mul r1, r2
    add r2, r1, r3    
    ldr r1, [r7]
    add r1, #0x53
    ldrb r1, [r1]
    mov r0, r1
    mov r1, #0
    mov r3, #46
    str r3, [sp]
    mov r3, #0
    ldr r5, write_method
    bl call_via_r5
    
print_ability_two:
    ldr r0, [sp, #0x1C]
    mov r3, #0x1C
    mul r0, r3
    ldr r1, base_stats
	ldr r1, [r1]
    mov r3, #0x16
    add r1, r1, r3
    add r1, r0, r1
    ldrb r2, [r1, #1]
    ldrb r5, [r1, #0]
    ldr r3, abilities
	ldr r3, [r3]
    cmp r2, r5
    beq return
    cmp r2, #0
    beq return
    mov r1, #0xD
    mul r1, r2
    add r2, r1, r3
    
    ldr r1, [r7]
    add r1, #0x53
    ldrb r1, [r1]
    mov r0, r1
    mov r1, #0
    mov r3, #60
    str r3, [sp]
    mov r3, #0
    ldr r5, write_method
    bl call_via_r5
    b return
    
unknown_base_stats:
    mov r0, r1
    mov r1, #0
    ldr r2, str_unknown
    mov r3, #4 @ y co-ord
    str r3, [sp]
    mov r3, #0 @ x co-ord
    ldr r5, write_method
    bl call_via_r5
    
return:
    mov r5, #0
    ldr r0, return_loc
    bx r0
    
print_stat:
    push {lr}
    ldr r3, [sp, #0x20]
    mov r1, #0x1C
    mul r3, r1
    ldr r2, base_stats
	ldr r2, [r2]
    add r2, r3
    add r2, r0
    ldrb r1, [r2]
    mov r4, r0
    ldr r0, fcode_buffer2
    mov r3, #0
    cmp r1, #99
    bhi no_leading_zeroes
    cmp r1, #9
    bhi one_leading_zero

two_leading_zeroes:
    str r3, [r0]
    add r0, #1

one_leading_zero:
    str r3, [r0]
    add r0, #1

no_leading_zeroes:
    mov r3, #3
    ldr r5, int_to_str
    bl call_via_r5
    
    mov r2, r4
    ldr r0, displayed_string
    ldr r1, str_table
    lsl r2, r2, #2
    add r1, r2
    ldr r1, [r1]
    ldr r5, fdecoder
    bl call_via_r5
    ldr r1, [r7]
    add r1, #0x53
    ldrb r1, [r1]
    mov r0, r1
    mov r1, #0
    ldr r2, displayed_string
    pop {r5}
    
call_via_r5:
    bx r5

.align 2
    base_stats:             .word 0x1BC + rom
    abilities:              .word 0x1C0 + rom
    str_table:              .word table + rom
    str_unknown:            .word capture + rom
    fcode_buffer2:          .word 0x02021CD0
    displayed_string:       .word 0x02021D18
    int_to_str:             .word 0x08008E78|1
    fdecoder:               .word 0x08008FCC|1
    write_method:           .word 0x081047C8|1
    return_loc:             .word 0x08106380|1
table:
	.word stat_hp + rom
	.word stat_atk + rom
	.word stat_def + rom
	.word stat_spe + rom
	.word stat_spa + rom
	.word stat_spd + rom
	
stat_hp:
	.byte 0xC2, 0xCA, 0x0, 0x0, 0xFD, 0x2, 0xFF
	
stat_atk:
	.byte 0xBB, 0xE8, 0xDF, 0x0, 0xFD, 0x2, 0xFF 
	
stat_def:
	.byte 0xBE, 0xD9, 0xDA, 0x0, 0xFD, 0x2, 0xFF
	
stat_spe:
	.byte 0xCD, 0xE4, 0xD9, 0x0, 0xFD, 0x2, 0xFF
	
stat_spa:
	.byte 0xCD, 0xE4, 0xBB, 0x0, 0xFD, 0x2, 0xFF
	
stat_spd:
	.byte 0xCD, 0xE4, 0xBE, 0x0, 0xFD, 0x2, 0xFF
	
capture:
	.byte 0xBD, 0xD5, 0xE4, 0xE8, 0xE9, 0xE6, 0xD9, 0x0, 0xDA, 0xE3, 0xE6, 0xFE, 0xE1, 0xE3, 0xE6, 0xD9, 0x0, 0xDD, 0xE2, 0xDA, 0xE3, 0xE6, 0xE1, 0xD5, 0xE8, 0xDD, 0xE3, 0xE2, 0xAB, 0xFF

Thanks to DoesntKnowHowToPlay for the base routine which I slightly edited / optimised, and to Squeetz for making the routine into a form that can be applied as a patch.
Click to expand...

is there a way to implement this also on emerald sir?....
 
sylingga

sylingga

Red Everywhere
86
Posts
10
Years
  • Age 32
  • Seen Apr 15, 2024
Is there any ASM that can provide mirror battle?
that copied our party pokemon, then battle with same our pokemon.
 

badb1994

4
Posts
1
Years
  • Age 29
  • Seen Jul 6, 2023
Blah said:

Temporarily disabling EXP gains from battle


It was brought to my attention by some requesters that for their battle/tournament events they wouldn't want their Pokemon leveling up. This routine disables the exp gains in battle. Note that the player can still use stuff like Rare Candy to level. The fix to that is exactly the same as this, but with slight modifications. I hope you don't give the player a chance to rare candy in battle though or I will go to your hack's thread and severly criticize your lack of common sense :c


How to insert:

Compile and insert the following routine into free space:

Spoiler:


Now navigate to 0x21CFA and insert the following byte changes:
Code: 
00 00 00 49 08 47 XX XX XX 08
Where XX XX XX is the reverse hex pointer to where you inserted this routine +1.

Usage:

If flag 0x202 is set, the EXP gains will be disabled. Obviously, to re-enable just clear the flag.
Currently the way I'm doing this is by making the game act like the player's party is already max level, so therefore they don't gain exp :)
Click to expand...
 

badb1994

4
Posts
1
Years
  • Age 29
  • Seen Jul 6, 2023
After testing out I found that this routine doesnt work as intended. After every battle the game just restarts. With or without flag set doesnt matter.

I just found out im using the wrong rom as base. In FireRed 1.0 it should work fine but not in BPRE
Does someone know where the battle scripts in BPRE are so I can find a solution myself?
 
Last edited:
DjTarma

DjTarma

192
Posts
5
Years
ThePuffinMan said:
Hello. I've recently got interested in FireRed ROM hacking and I'm trying to make my own ROM hack. I have followed Blah's beginner ASM tutorial about inserting ASM routines into my ROM. I have gone up to the last step of that tutorial where I have to use the "callasm" command and run my routine from my ROM. I spent hours researching online but I cannot find an answer. My query is, how do I insert this ability effect routine into my ROM hack? I am using Mr. DollSteak's ROM base v1.5a, and the routine is adding the abilities Toxic Boost and Flare Boost from the Ability Resource Thread. I am also using karatekid552's THUMB editor. So far, I have tested the compilation, created a .bin file and have inserted the script into my ROM at offset 0xC4F004 because I was told you must reverse the bytes. Assistance is much appreciated, thank you.

The script code is in the spoiler below:

Spoiler:
Click to expand...

I can help you via Discord if you want.
You will need to copy from .text to .Return2: .word 0x0803F0E1
Paste in the THUMB editor Compiler tool.
And under the "Compile" option, select the option for "output to bin".
Open your file in a hexadecimal editor (I ask you to use Hex Maniac Advance) and you can paste it in your hack (in a safe address, with FFs).

In the address, 03F0C4 (Use Ctrl + G and paste this in HMA), insert 00 48 00 47 <address that you inserted the compiled bin routine(Maybe the last byte you must insert a +1 byte)> [When you use "<", HMA recognize as anchor to a address. Close with ">"]
 

Volpe92

a
7
Posts
5
Years
  • Age 32
  • Seen Apr 17, 2024
For fire red
does anyone know of a way to talk to an NPC and change the pokemon's ability to its hidden ability?
Thank you
 
Last edited:
jmynes

jmynes

Jordank
4
Posts
1
Years
Unfortunately, all three links under Evolution Moves in the thread OP go to the same post:

Code: - ASM Resource Thread

Side Quest Menu [FR] This hack converts the PC item storage menu into a side quest menu, or task list, etc. Here is the repository, the compilation instructions are included in the readme. You will need to define your own parameters/ram in src/headers/defs.asm and create your own tables of...
www.pokecommunity.com

This post has no archive, and is linked to a 404 on github

Ghoulslash posted an updated version of one of the routines a few posts lower on the same page, it's maybe possible to recreate the scripts, but I'm unfamiliar with them.
 
EdgeZard X

EdgeZard X

42
Posts
8
Years
  • Age 29
  • Seen Apr 25, 2024
I sort of understand how Move Tutors work, but I wanted to make an 'improved' Move Tutor in Fire Red that worked like a shop...

Instead of only being able to teach one move, they would have a list of moves (I think I would need to use the normal Move Tutor list though just to ensure learn capability? Though I would be looking to expand the list of tutor moves with HMA)
Would it be possible to ASM a Move Tutor 'shop' that would allow your Pokémon to learn moves for a certain price?

(I also wanted to make an item you could give them that would remove the price)
 
Last edited:

RoyPokeStar

4
Posts
139
Days
  • Seen Apr 20, 2024
May some tell how to run asm every step in Fire Red V1.0
I tried changing bytes at 0x6D5F6 with 01 4A 10 47 00 00 XX XX XX 08
BUT It didn't went well either game freeze or refresh when I move in game
Here in this thread I tried Blah's HP regeneration but when I moved game freeze Please tell me why and how to fix it
 
EdgeZard X

EdgeZard X

42
Posts
8
Years
  • Age 29
  • Seen Apr 25, 2024
So, I made a new item to use in place of the field move Fly

Currently, it works via directly calling C4EF9 as its field effect (the part of Fly that brings up the map, and one selects a location to go to)
However, there are two problems I need help solving:

  1. Because it calls the Fly script, it also calls the Fly animation - but the Pokémon shown is always the Pokémon shown in the first slot of the party. I want to change this so using the item shows a 'special' Charizard sprite, but without the Pokéball animation (preferably while keeping the regular animation of Fly in case anyone uses the field move)
  2. Whilst Fly outright cannot be used indoors, the item can - though when a location is selected it goes back to the Pokémon menu instead of executing the Fly animation. However, with certain map types one can still use the item to Fly even if Fly itself does not work. I need the item to outright fail if the player tries using it in an inappropriate location (maybe by saying something like "there's no signal!")

This probably might have been easier to do via C code, but I need it in ASM form (since I'm not using the decomp)



...also, I think I found a problem with the custom givepokemon command (or maybe it is the initial "custom moves" routine you need to place somewhere)? I don't know if it's the routine itself or the way my particular ROM is interacting with it (I have an expanded moves table, though I can give Pokémon with custom moves after Psycho Boost without issue), but...

If a Pokémon has less than four unique level up moves, if it is encountered (wild or Trainer without custom moves) or given at a level where it would know all of those moves already, then the move slots after its last known move do strange things.

e.g. if it only has one unique move, then move two becomes glitched up (I assume it is reading the terminator bytes FFFFFFFF as a move somehow) and then move 3 and 4 are taken from presumably the next Pokémon (it seems to be Wobbuffet, judging by Counter and Mirror Coat)
Screenshot 2024-03-27 164941.png

Caterpie would have Tackle, String Shot, FFFF and Harden (from Metapod)

I have not encountered any problems when levelling up Pokémon to even over level 100 - only directly obtaining or encountering them at a high enough level.

Spoiler:
 
Last edited:
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