(This is my first post, so apologies if it's a little rough around the edges. :3)
For a while now I've been planning on hacking Tetris Attack for the Game Boy to turn it into Panel de Pon (since it was a Yoshi game even in Japan and PdP just needs more love in general). While the changes between PdP and TA are pretty extensive, I figured that the easiest thing to start with would be editing the graphics to replace the Yoshi's Island characters with the original game's fairies, so the first thing I do is open the game up in YY-CHR. This is what I see:
All of the game's graphics, bar the "Game Over" text, several other graphics in the same bank, and a handful of others, are compressed. There are two major problems with this:
1. I'm relatively new to the ROM hacking business, so I can't identify the compression method the game uses.
2. To my knowledge, decompressing graphics from non-GBA games requires writing a program from scratch specifically to do so, and I have zero programming experience.
If I could overcome those hurdles, I'd be able to edit the graphics.
Does anyone have any help they could offer? (Do not
know how I missed that.)