Code: ASM Resource Thread

chrunch · Sep 7, 2015

DizzyEgg said:
You probably messed up pointers. Try doing it again and make sure all your pointers are correct.

It seems that TMs are still consumable if taught to a pokemon without animation, i.e. if it only knows 2 moves.

There's already a fix for this here.

avantimaestro · Sep 7, 2015

Lance32497 said:
Hello, since the EXP. Gain canceller had been effin'ly implemented, it's good to have MONEY gain and reduce canceller so that we can make a Battle frontier-like event.
Request

Temporarily disabling prize money from battle

(Only works in FireRed)

Here is a routine that will prevent you from getting money after you won a battle against a trainer. Good for tournament-style battles, where it makes no sense that you get or lose money.

How to insert:

Compile and insert this routine anywhere into free space:

Spoiler:

Now navigate to 0x0259E8 and insert following bytes:

Code:

00 48 00 47 XX XX XX 08

Where XX XX XX is the location of the routine you inserted + 1.

Next compile and insert this routine into free space:

Spoiler:

Finally navigate to 0x054BE0 and insert following bytes where XX XX XX is the location of the second routine +1:

Code:

00 48 00 47 XX XX XX 08

This thing requires two routines, that's because the money gets reduced when you black out while the prize money is gained after the message appears. These are two different places so there have to be two different functions :P

At last you should also want to remove the text that appears after winning/losing that informs you about the money you gained/lost. You need another routine for that. Compile and insert into free space:

Spoiler:

Now change the bytes at 0x032B44 to following (XX XX XX) is the location of this last routine:

Code:

00 48 00 47 XX XX XX 08

How to use:

In order to disable prize money you have to set the flag 0x203.
If you want to reenable it just clear the flag and you will get money again.

Joexv · Sep 7, 2015

NylonGamer said:
Temporarily disabling prize money from battle

Here is a routine that will prevent you from getting money after you won a battle against a trainer. Note that the message telling you about your prize money still shows up, iI am working on that. I'll update the post later with the final version because I don't have much time today. EDIT: I just realized ita lso doesn't work when you lose, so just wait a bit and dont insert it yet...

How to insert:

Compile and insert this routine anywhere into free space:

Spoiler:

Code:

.text .align 2 .thumb .thumb_func main: push {r0-r3} mov r0, #0xFF lsl r0, r0, #0x1 add r0, r0, #0x5 ldr r2, =(0x806E6D0 +1) bl linker cmp r0, #0x1 beq skip pop {r0-r3} mov r0, #0x0 mov r1, r8 ldr r0, [r1] mov r1, #0xa4 lsl r1, r1, #0x2 add r0, r0, r1 add r1, r4, #0x0 ldr r2, =(0x809FDA0 +1) bl linker ldr r1, =(0x8025A00 +1) bx r1 skip: pop {r0-r3} mov r0, #0x0 mov r1, r8 ldr r0, [r1] mov r1, #0xa4 lsl r1, r1, #0x2 add r0, r0, r1 add r1, r4, #0x0 ldr r1, =(0x8025A00 +1) bx r1 linker: bx r2 .align 2

(not really space saving, i know...)

Compiled:

Code:

0F B4 FF 20 40 00 05 30 0E 4A 00 F0 19 F8 01 28 0C D0 0F BC 00 20 41 46 08 68 A4 21 89 00 40 18 21 1C 09 4A 00 F0 0C F8 08 49 08 47 0F BC 00 20 41 46 08 68 A4 21 89 00 40 18 21 1C 03 49 08 47 10 47 C0 46 D1 E6 06 08 A1 FD 09 08 01 5A 02 08

Now navigate to 0x0259E8 and insert following bytes:

Code:

00 48 00 47 XX XX XX 08

Where XX XX XX is the location of the routine you inserted + 1.

How to use:

In order to disable prize money you have to set the flag 0x203.
If you want to reenable it just clear the flag and you will get money again.

The location of the text is 0x3FB41A, there seem to be only one pointer to it, its setup in a table along with various other winning/losing messages which appears to start at 0x3FDF3C. Hope this helps.

loser · Sep 7, 2015

DizzyEgg said:
You probably messed up pointers. Try doing it again and make sure all your pointers are correct.

It seems that TMs are still consumable if taught to a pokemon without animation, i.e. if it only knows 2 moves.

Where XX XX XX is the location of the routine you inserted + 1.

I don't really get what the "+1" means. That's probably where I messed up.

Deokishisu · Sep 7, 2015

FrogInfected said:
I don't really get what the "+1" means. That's probably where I messed up.

If you put the routine at 0x800000, your pointer would NOT be 00 00 80 08, it would be 01 00 80 08, as if the location was 0x800001. It's a THUMB quirk, I think.

Pokemon_XY · Sep 8, 2015

I would like to make a request: wild double battle in Pkmn FR version
Based on JPAN's document on battle scripts, we can change a word in the EWRAM to change the battle type. However, simply putting a hook at the function storing type to that location is obviously with several bugs so I hope that someone will get the full source code and share it, thanks!

esperance · Sep 8, 2015

Day/Night Switching of Textbox Palettes (FireRed)

So this is one of my few successful ASM hacks. What it does is swap the palettes used by the textbox depending on whether it is day or night (based on Prime Dialga's D/N system). Some of you older users may remember such a feature being implemented by Shiny Quagsire for Pokémon Grey (iirc).

So the first thing you need to do is go to 0x471DEC and copy 0xA0 bytes there, and then paste them into freespace somewhere. Be sure to note the offset. These are the five palettes used by the textboxes. You can use this copy as the base for your new night palettes.

Next, assemble and insert the following routine into freespace, once again noting the offset. Be sure to replace the ZZZZZZ with the offset of your new night palettes.

Code:

.text
.align 2
.thumb
.thumb_func

main:
  @ get the time
  ldr r1, =(0x300553C) @ if your RTC uses a different location for the time, change this
  ldrb r1, [r1, #0x6]

  @ check the time
  @ if <= 6 AM or >= 6 PM
  @   load night palette
  @ else
  @   load day palette
  cmp r1, #0x6 @ 6 AM
  ble set_night
  cmp r1, #0x12 @ 6 PM
  bge set_night

set_day:
  ldr r1, day_palette
  b return

set_night:
  ldr r1, night_palette

return:
  @ this uses the end of the original function
  @ so there should be no problems
  add r0, r0, r1
  pop {r1}
  bx r1

.align 2

day_palette:
  .word 0x08471DEC

night_palette:
  .word 0x08ZZZZZZ @ change this to your night palette

Now finally, navigate to 0x150448 and place this (the hook):

Code:

00 49 08 47 XX XX XX 08 00 00 00 00

Where XX XX XX 08 is the pointer to the location you inserted the ASM + 1.

I know it's a bit of a silly hack, but I hope someone makes use of it! :)

loser · Sep 11, 2015

Deokishisu said:
If you put the routine at 0x800000, your pointer would NOT be 00 00 80 08, it would be 01 00 80 08, as if the location was 0x800001. It's a THUMB quirk, I think.

So it's just +1 for the first byte? Also, for every asm pointer, do I always have to add +1?

chrunch · Sep 11, 2015

FrogInfected said:
So it's just +1 for the first byte? Also, for every asm pointer, do I always have to add +1?

Yes, and no only if it says to.

Pokemon_XY · Sep 11, 2015

FrogInfected said:
for every asm pointer, do I always have to add +1?

No, that depends on the way to jump to the code.
If you use bx (or callasm in script, which also use bx to jump to the code), you should add 1 if the code is in thumb mode as is always the case.
If you use another way to branch, such as

Code:

ldr r0, .addr
mov pc, r0
.align 2
.addr: [offset of your code]

This kind of code don't need to add 1 to the pointer of the code it jumps to.
But most people use bx to jump, so adding 1 is often required.

Splash · Sep 11, 2015

ASM Request:
Sneak Mechanic from ORAS
Function:
Slowing down the movement that will give you higher chance of encountering shiny pokemon or pokemon with egg moves.

loser · Sep 12, 2015

chrunch said:
Yes, and no only if it says to.

Alright, thanks guys. Pretty new to asm, as you can tell.

kleenexfeu · Sep 12, 2015

I know there's several routines like this one, but I didn't found them practical.

Check a specific pokémon with a specific slot through the use of Special 0xA2, for Emerald :

Spoiler:

Le pug · Sep 12, 2015

NylonGamer said:
Spoiler:

Temporarily disabling prize money from battle

Here is a routine that will prevent you from getting money after you won a battle against a trainer. Good for tournament-style battles, where it makes no sense that you get or lose money.

How to insert:

Compile and insert this routine anywhere into free space:

Spoiler:

Code:

.text .align 2 .thumb .thumb_func main: push {r0-r3} mov r0, #0xFF lsl r0, r0, #0x1 add r0, r0, #0x5 ldr r2, =(0x806E6D0 +1) bl linker cmp r0, #0x1 beq skip pop {r0-r3} mov r0, #0x0 mov r1, r8 ldr r0, [r1] mov r1, #0xa4 lsl r1, r1, #0x2 add r0, r0, r1 add r1, r4, #0x0 ldr r2, =(0x809FDA0 +1) bl linker ldr r1, =(0x8025A00 +1) bx r1 skip: pop {r0-r3} mov r0, #0x0 mov r1, r8 ldr r0, [r1] mov r1, #0xa4 lsl r1, r1, #0x2 add r0, r0, r1 add r1, r4, #0x0 ldr r1, =(0x8025A00 +1) bx r1 linker: bx r2 .align 2

(not really space saving, i know...)

Compiled:

Code:

0F B4 FF 20 40 00 05 30 0E 4A 00 F0 19 F8 01 28 0C D0 0F BC 00 20 41 46 08 68 A4 21 89 00 40 18 21 1C 09 4A 00 F0 0C F8 08 49 08 47 0F BC 00 20 41 46 08 68 A4 21 89 00 40 18 21 1C 03 49 08 47 10 47 C0 46 D1 E6 06 08 A1 FD 09 08 01 5A 02 08

Now navigate to 0x0259E8 and insert following bytes:

Code:

00 48 00 47 XX XX XX 08

Where XX XX XX is the location of the routine you inserted + 1.

Next compile and insert this routine into free space:

Spoiler:

Code:

.text .align 2 .thumb .thumb_func main: mov r0, #0xFF lsl r0, r0, #0x1 add r0, r0, #0x5 ldr r2, =(0x806E6D0 +1) bl linker cmp r0, #0x1 beq skip add r0, r4, #0x0 ldr r2, =(0x809fdd8 +1) bl linker skip: ldr r2, =(0x80a0058 +1) bl linker ldr r2, =(0x8054BEA +1) linker: bx r2 .align 2

Compiled:

Code:

FF 20 40 00 05 30 07 4A 00 F0 0A F8 01 28 03 D0 20 1C 05 4A 00 F0 04 F8 04 4A 00 F0 01 F8 04 4A 10 47 C0 46 D1 E6 06 08 D9 FD 09 08 59 00 0A 08 EB 4B 05 08

Finally navigate to 0x054BE0 and insert following bytes where XX XX XX is the location of the second routine +1:

Code:

00 48 00 47 XX XX XX 08

This thing requires two routines, that's because the money gets reduced when you black out while the prize money is gained after the message appears. These are two different places so there have to be two different functions :P

At last you should also want to remove the text that appears after winning/losing that informs you about the money you gained/lost. You need another routine for that. Compile and insert into free space:

Spoiler:

Code:

.text .align 2 .thumb .thumb_func main: ldr r0, =(0x83fb432) cmp r2, r0 beq checkflag ldr r0, =(0x83fb4f6) cmp r2, r0 beq checkflag b noskip checkflag: mov r0, #0xFF lsl r0, r0, #0x1 add r0, r0, #0x5 ldr r3, =(0x806E6D0 +1) bl linker cmp r0, #0x1 beq skip noskip: ldr r0, =(0x202298C) mov r1, #0x0 ldr r3, =(0x80D87BC +1) bl linker skip: ldr r0, =(0x8032B4C +1) bx r0 linker: bx r3 .align 2

Compiled:

Code:

0B 48 82 42 03 D0 0B 48 82 42 00 D0 07 E0 FF 20 40 00 05 30 08 4B 00 F0 09 F8 01 28 04 D0 07 48 00 21 07 4B 00 F0 02 F8 06 48 00 47 18 47 C0 46 32 B4 3F 08 F6 B4 3F 08 D1 E6 06 08 8C 29 02 02 BD 87 0D 08 4D 2B 03 08

Now change the bytes at 0x032B44 to following (XX XX XX) is the location of this last routine:

Code:

00 48 00 47 XX XX XX 08

How to use:

In order to disable prize money you have to set the flag 0x203.
If you want to reenable it just clear the flag and you will get money again.

Requesting this in Emerald. Great resource and besides tournaments, it can be used for trainer-battle styled wild pokemon battles (obviously they dont give you $)

Ephraim225 · Sep 13, 2015

Checking HM Compatibility
Hey guys, I've got a fun one for you. If you're like me and hate wasting move slots on HMs, this hack will make that a thing of the past. This hack checks whether the player's team contains a Pokemon that can learn an HM you specify. It doesn't check if they actually HAVE it, only whether they CAN learn it. Used correctly, the player can simply walk up to a tree and cut it immediately if they have a Pokémon that can cut. This is for Fire Red but porting it should be simple if you know the equivalent offsets in Emerald (and I don't, if someone does, let me know and I'll update this post)

Compile and insert to free space:

Spoiler:

NOTE: Before you compile, direct your attention to the line highlighted in blue. The offset here is the offset of the table that determines TM/HM compatibility. If you have expanded the number of Pokémon in your hack, be sure to change this offset to whatever the new offset is.

Now, using this ASM is simple. In whatever script you're writing, first set variable 0x800D (aka LASTRESULT) to one of the following values based on the HM you are checking:

Spoiler:

Then, call the ASM using Callasm. After the ASM runs, variable 0x800D will be set to the party slot containing the Pokémon who can learn whatever move you checked for, or 0x6 if no Pokémon was found.

The only issue is, Fly and Flash aren't used in scripts by the game, and Dive and Waterfall can't be checked. Making items that perform the same functions using other methods, however, is a working substitute.

Here's an example script. Let's say I'm editing the cut tree script. (If you remove the badge check and attack check as I have you can actually overwrite the original script with this, as there's enough space for it)

Spoiler:

Anyways, that's that. I'll be using this in the future, but I do hope others can make use of it too.

Blah · Sep 13, 2015

Ephraim225 said:
Checking HM Compatibility
Hey guys, I've got a fun one for you. If you're like me and hate wasting move slots on HMs, this hack will make that a thing of the past. This hack checks whether the player's team contains a Pokemon that can learn an HM you specify. It doesn't check if they actually HAVE it, only whether they CAN learn it. Used correctly, the player can simply walk up to a tree and cut it immediately if they have a Pokémon that can cut. This is for Fire Red but porting it should be simple if you know the equivalent offsets in Emerald (and I don't, if someone does, let me know and I'll update this post)

Compile and insert to free space:

Spoiler:

.align 2
.thumb

start:
push {r0-r5, lr}
mov r5, #0x0

loopback:
ldr r0, =(0x2024284) /* Player's party in RAM */
mov r2, #0x64
mov r1, r5
mul r1, r1, r2
add r0, r0, r1
mov r1, #0xB
ldr r3, =(0x803FBE8 +1) /* Pokemon decrypter */
bl linker

ldr r3, =(0x8252BD0) /* TM Compatibility table */
lsl r0, r0, #0x3
add r3, r0, r3
add r3, r3, #0x6
ldrb r2, [r3]
ldr r1, =(0x20370D0) /* Var 0x800D in RAM */
ldrb r0, [r1]
mov r3, r0
and r3, r2, r3
cmp r0, r3
beq end

ldr r3, =(0x2024029) /* Player's team size */
ldrb r3, [r3]
add r5, r5, #0x1
cmp r5, r3
beq endfail
b loopback

end:
strb r5, [r1]
pop {r0-r5, pc}

endfail:
mov r5, #0x6
strb r5, [r1]
pop {r0-r5, pc}

linker:
bx r3

NOTE: Before you compile, direct your attention to the line highlighted in blue. The offset here is the offset of the table that determines TM/HM compatibility. If you have expanded the number of Pokémon in your hack, be sure to change this offset to whatever the new offset is.

Now, using this ASM is simple. In whatever script you're writing, first set variable 0x800D (aka LASTRESULT) to one of the following values based on the HM you are checking:

Spoiler:

0x4 - Cut
0x8 - Fly
0x10 - Surf
0x20 - Strength
0x40 - Flash
0x80 - Rock Smash

Then, call the ASM using Callasm. After the ASM runs, variable 0x800D will be set to the party slot containing the Pokémon who can learn whatever move you checked for, or 0x6 if no Pokémon was found.

The only issue is, Fly and Flash aren't used in scripts by the game, and Dive and Waterfall can't be checked. Making items that perform the same functions using other methods, however, is a working substitute.

Here's an example script. Let's say I'm editing the cut tree script. (If you remove the badge check and attack check as I have you can actually overwrite the original script with this, as there's enough space for it)

Spoiler:

#org 0x81BDF13
'-----------------------------------
special INIT_STEPCOUNT
compare LASTRESULT 0x2
if == jump 0x81A7AE0 ' Equal To
lockall
setvar LASTRESULT 0x4
callasm 0x8XXXXXX ' This should be changed to wherever you put the ASM in your ROM
compare LASTRESULT 0x6
if == jump 0x81BDF87 ' This skips the rest of the script if 0x6 is returned
setanimation 0x0 0x800D
storepartypokemon 0x0 0x800D
storeattack 0x1 0xF
msgbox 0x81BDF94 ' This tree looks like...
callstd MSG_YESNO ' Yes/No message
compare LASTRESULT NO
if == jump 0x81BDF91 ' Equal To
msgbox 0x81BDFD7 ' \v\h02 used \v\h03!
callstd MSG_NOCLOSE ' Non-closing message
closemsg
doanimation 0x2
waitspecial
jump 0x81BDF76

Anyways, that's that. I'll be using this in the future, but I do hope others can make use of it too.

First of all, good job! As for the issues with Surf, Waterfall and Fly, I think these links would help you a good amount:
https://www.pokecommunity.com/showthread.php?t=338513
https://www.pokecommunity.com/showpost.php?p=8676227&postcount=530

Lastly, just a small tip.

Code:

cmp r5, r3
beq endfail
b loopback

When you have two branches in a row (and one or both aren't "bl") it can be reduced to a single branch. Here bne loopback would do the same as these two branches if you move endfail as the next line in sequence :)

Z-nogyroP · Sep 14, 2015

Hey, I'm not sure if this is the correct place to put this, but I used KDS's script for the Wide Lens in my hack. It compiled properly and everything, but the game isn't letting me hold the item, so I can't test if it actually worked.

Where's the check that says whether or not an item can be held?

Pokemon_XY · Sep 18, 2015

FBI said:
I don't know where it is either. Perhaps you can ask daniilS via VM or something.

1) For forced evolution, I don't know what you're really talking about. You mean just make a Pokemon evolve without giving the player time to hit the "b" button? I'll look into Pokemon evolution sure.

2) I haven't seen it so VMing me it would be nice. Anyways this is rather easy, I've done it before. I'll post the results at the bottom of this post.

3) Skipping the introduction was already done by Knizz. There's a post in the research and development section's quick research thread.

Preventing TMs from being consumed on use

Quick research:
TMs are deleted in two places. The first place is in their own function. When called from the bag, after use the TM has it's own deletion mechanism. The second way is from the bag, after you use a TM the bag attempts to delete it as well. Well, the solution is quite simple. There's two ways to do this, either go to 0809A1D8 call your own function there which checks if the item is a TM, and if it is, just jump to the end. Or much more simply you just remove the parts from the bag and tm function that deletes the TM (Which is what I did). The former way is a way you can make another item you have unconsumable.

To insert:
Do the byte changes below
0x124F78: 00 00 00 00
0x125C80: 00 00 00 00

Make it Ungivable:
insert that at 0x1326B8: 00 00 17 E0

Make it consumable after animation:
Insert: 00 00 00 00 at 0x124F78

To remove the quantities showing up in the bag:

Compile and insert into free space:

Spoiler:

Code:

.text .align 2 .thumb .thumb_func main: cmp r5, #0x0 bne end ldr r3, =(0x8131EFE +1) bx r3 end: mov r0, r7 mov r1, #0x8 mov r2, r4 ldr r6, =(0x81335B0 +1) bl link ldr r3, =(0x8131EFE +1) bx r3 link: bx r6 .align 2

Here's a compiled version:

Code:

00 2D 01 D1 05 4B 18 47 38 1C 08 21 22 1C 04 4E 00 F0 02 F8 01 4B 18 47 30 47 C0 46 FF 1E 13 08 B1 35 13 08

Now navigate to 0x131EF4 and insert:

Code:

00 48 00 47 XX XX XX 08

Where XX XX XX is the pointer to where you assembled the routine +1

Now navigate to 0x131EA5 and change the byte to E0

Unsellable:
Basically for the TMs, you can still sell them to vendors. To change this, you need to modify each TM individually. It's unfortunate, but the game checks if an item can be sold my comparing it's market price to zero. If it's strictly greater than zero, then you can sell it to a vendor, seems to be the rule. So to make TMs unsellable you need to set their market prices individually to zero.
I can't use my own checks to disguise the TMs as unique because the sell routine in shops are used for ALL items including potions, berries, TMs, and other items like nuggets.

Present :3

I've found a way to make TMs unsellable:

Code:

0x132924 - 00 00 00 00

In addition, the quantity in bag when you buy TMs in the game should be hided, and here is a quick way to remove the box which shows the quantity for all items:

Code:

0x9BCC2 - 00 00 00 00

So here's the full code, no extra routines needed

Reusable TMs

Code:

0x1326BA - 17 E0 //can't hold as item
0x124F78 - 00 00 00 00 //can't delete
0x125C80 - 00 00 00 00 //can't delete
0x124EAC - 00 00 00 00 //can't delete
0x131EA6 - 2A E0 //fix the graphic
0x132924 - 00 00 00 00 //can't sell
0x9BCC2 - 00 00 00 00 //hide the box showing quantity

My contribution:

Forcing the text speed to "fast"

It is done by neglecting the speed set by the player:

Code:

0xF78D0 - 01 20

Then everything is done automatically.

robinjea · Sep 19, 2015

Pokemon_XY said:
I've found a way to make TMs unsellable:

Code:

0x132924 - 00 00 00 00

In addition, the quantity in bag when you buy TMs in the game should be hided, and here is a quick way to remove the box which shows the quantity for all items:

Code:

0x9BCC2 - 00 00 00 00

So here's the full code, no extra routines needed

Reusable TMs

Code:

0x1326BA - 17 E0 //can't hold as item 0x124F78 - 00 00 00 00 //can't delete 0x125C80 - 00 00 00 00 //can't delete 0x124EAC - 00 00 00 00 //can't delete 0x131EA6 - 2A E0 //fix the graphic 0x132924 - 00 00 00 00 //can't sell 0x9BCC2 - 00 00 00 00 //hide the box showing quantity

My contribution:

Forcing the text speed to "fast"
It is done by neglecting the speed set by the player:

Code:

0xF78D0 - 01 20

Then everything is done automatically.

Umm... Hi. I believe I don't understand the implication of your comment "//can't delete". Does this mean I can't delete the attack I taught using a TM?

Pokemon_XY · Sep 19, 2015

BlackWhiteRobin said:
Umm... Hi. I believe I don't understand the implication of your comment "//can't delete". Does this mean I can't delete the attack I taught using a TM?

It means that it won't be deleted even it's used so that's just part of this hack. (It is from FBI's hack so please don't worry about it)

Code: ASM Resource Thread

More options

chrunch

avantimaestro

Joexv

ManMadeOfGouda joexv.github.io

loser

Deokishisu

Mr. Magius

Pokemon_XY

esperance

Day/Night Switching of Textbox Palettes (FireRed)

loser

chrunch

Pokemon_XY

Splash

But nothing happened.

loser

kleenexfeu

Le pug

Creator of Pokémon: Discovery / Fat Kid

Ephraim225

Freaky Frillish Guy

Blah

Free supporter

Z-nogyroP

Pokemon_XY

Preventing TMs from being consumed on use

Reusable TMs

Forcing the text speed to "fast"

robinjea

Reusable TMs

Forcing the text speed to "fast"

Pokemon_XY