[Pokeemerald] Inserting Custom Sprites

I'm going to assume you already have Pokéemerald set up. If you're unsure of how to do that, check out ProjectRevoTPP's tutorial. The sprite editing process is the same for Pokéruby if you'd prefer to use that but why would you.
A tool named GraphicsGale makes editing images and palettes for GBA ridiculously easy, you can get yourself a copy here.
You'll also want Notepad++ for editing files (optional).

Indexing Sprites​

I've already covered how to index sprites in another thread already, but it seems like people were skimming past the sentence where I linked it here, so I'll just repost in the spoiler below.

Replacing Sprites​

This method can be used to replace a wide variety of sprites with your own - such as the bags, item icons, etc. Any 16 colour sprite. The method is the same for Pokémon, the only difference there is that you need an extra palette for the shiny version, so I didn't think Pokémon sprites needed their own guide. Although if there are any requests for that, I'll make an addition to this tutorial. For example purposes we'll refer to trainer sprites.

To get started, grab an indexed sprite you want to insert (should be in .png format) and rename the file to give it the same name as the sprite you'd like to replace. For tutorial purposes, I'm using my own hiker trainer sprite to update the standard one, so I'll name it "hiker_front_pic". The trainer sprites are located in "pokeemerald\graphics\trainers\front_pics". Open your sprite in GraphicsGale.


Click the little arrow outlined in red above and hit "Save Palette". Navigate to "pokeemerald\graphics\trainers\palettes". Save your new palette over the top of the one you want to replace. For me, that's "hiker.pal". Now go back to the "front_pics" folder. Delete the original sprite ("hiker_front_pic.png" for tutorial reference) and replace it with your own. Compile, test and... yeah, you're done!
If that didn't work for you for whatever reason, click the spoiler and try this way... longer winded but foolproof.

Inserting New Trainer Backsprites​

The method for trainer backsprites is pretty much the same. There's just an extra little thing to be aware of: player backsprites actually use the same palette as the player front sprites. If you're happy for your back and front hero/heroine sprites to share a palette, all you have to do is overwrite "brendan.pal" or "may.pal" with your new palette. After you've done that, overwrite the old sprite(e.g. "brendan_back_pic") with your new one, compile, test and you're done!

But I don't want my trainer backsprite to share a palette with its front sprite! Fear not, it's really easy to de-link them and it'll only take you a few minutes; it's just a matter of editing three files. Read on or if you're viewing this as a single post click here.

De-linking Palette Sharing Between Player Back & Front Sprites​

OK, so firstly you'll want to save your new backsprite pals from the indexed image to the "palettes" folder in "graphics\trainers". For easiness, I've named mine "brendan_back" and "may_back" to go with the sprite names. The next thing we have to do is define the new labels we'll use for our separate backsprite palettes. Navigate to "pokeemerald\include". Open "graphics.h" in Notepad++ and add the following two lines:


I've //commented the lines in the picture for the sake of this guide so you can see where I've put them.
Now go to "pokeemerald\src\data\graphics\trainers.h". Add the following two lines:


Finally, navigate to "pokeemerald\src\data\trainer_graphics\back_pic_tables.h" and add your new palette references here. For example, change this:
To this:
Like so:



Compile, test, and there you have it! You should now have separate palettes for your player back and front sprites, so you don't have to worry about colours between the two matching.

Hey,

Don't know where else to really ask this, but where in the pokeemerald depository could one edit the palettes of the "walking, surfing..." from the overworld sprite of character?
Pokemon an trainer battle sprites I get , but I don't know where the palettes of those sprites are stored and how to adjust them?

Thanks in advance, and happy belated Bunny day!

So the various palettes are in graphics/object_events/palettes, and the particular palettes used by each animation are listed in src/data/object_events/object_event_graphics_info.h.

For example:
Brendan's regular walking animation uses palette 8, and (IIRC) his reflection uses palette 10, whereas May uses 17 and 10.

Thanks swalot ! Edited those and it works as a charm!

Is there a similar program to Graphics Gale that I can use on Mac?

Hi, I tried to do that but when I replace the sprite the compiler won't take into account the new file. Everytime I need to force it with -B to recompile everything to make it work (which of course takes time). Do you have any idea why ?

Also, when the sprite is imported the background appears in white even though it is transparent in photoshop. I am not very familiar with palettes and sprites so maybe I missed something ?
Note that when imported in a clean ROM using old-fashioned ways (Advanced Sprite Editor) the transparent background works.

Edit: I tried with the Gale software from your guide before asking. Same result
Edit2: Found out about the transparency, it is because the transparency color in the palette is the last oneinstead of the first. No idea how to fix this, I've been looking for hours for a tool to switch palette order without destroying the image but no luck
Edit3: Fixed transparency issue by opening the image in GraphicsGale then All Frame > Color Depth > 16 Colors. This creates an image with the correct palette

Sylwer said:

Hi, I tried to do that but when I replace the sprite the compiler won't take into account the new file. Everytime I need to force it with -B to recompile everything to make it work (which of course takes time). Do you have any idea why?

Click to expand...

It's likely a dependency issue with make. I've had success with manually deleting the .4bpp/.gbapal files to trigger a rebuild.

How do you change the actual player icon sprites

Trainermon said:

How do you change the actual player icon sprites

Click to expand...

What do you mean by "player icon sprites"? The overworld sprites of Brendan and May? They're located in pokeemerald\graphics\object_events\pics\people.
To modify them, you can use your favorite image editing software. Just keep in mind they must have a maximum of 16 colors (with the color in the first slot of its palette being the same one used as the background color).

For some weird reason the sprites aren't changing. I changed the palette and the sprite exactly like you did but it's still showing the original sprite once I run a test to see if it changed.

TJLoyd said:

For some weird reason the sprites aren't changing. I changed the palette and the sprite exactly like you did but it's still showing the original sprite once I run a test to see if it changed.

Click to expand...

run "make clean" and then your normal "make" again, that could be the problem

i got it working

how?

Okay, so I'm kind of slow at all this stuff, and sprites have nearly given me an aneurysm. I have an issue where, following the steps above for just regular editing, my front and back sprites look awesome but my OW ones have issues. I left Brendan as he is for now by my May sprite has new colors, and when a trainer [!] come up, its like dull orange for the '!' with a yellow tint for the white, and the surf mon is a couple colors of green. I'm not quite sure how to use the information already on this thread so far to fix the issue. Thanks in advance!

Both of these issues are connected to the Palette. The emotion popup color is based on your player's palette, and uses color number #14 (second to last, 0-15). The Surf blob is also tied to the MAY palette. I fixed mine by changing Surf Blob to use pal tag NPC 1.

That's what I suspected but I was unsure of how to troubleshoot effectively. Thank you!!

Hiya, I'm trying to give castform a sandstorm form. However, it leads to very unstable behavior.
I've created sprites for anim, front, and back, as well as normal+shiny palletes, they're all fine.
In battle.h there's this bit:


In battle_anim_mons.c there's 3 arrays for the types, I've updated those too
(such as this one)


I've updated the CastformDataTypeChange in battle_util.c

And in the graphics_file_rules.mk I changed added the sandy sprites.


The game compiles just fine, but it breaks castform entirely. Catching one might do one of the following: Nothing special, stop audio, override audio with glitch sounds, freeze game, restart game.
Having it transform into the sandy form will freeze animation, but not the audio. It freezes in the blocky state, but the colour of the blocks does already match the correct pallette.

I think it's likely a ram issue, that the 1 extra entry in the array of castform forms (castforms?) causes an overflow later on, but I don't know how to fix that. I've been looking everywhere I can, and can't find it, so out of desperation I'm posting here, I hope you can help :P