I have seen bitmap (windows), bitmap (GBA/DS), 4bpp and 8bpp GBA standard, jpeg as well as PNG all used.
Everything ends up tiled eventually but it is not that difficult to tack on some real time decoding (there are many libraries that do it for you) and use a standard format.
And the resoultion is 256 x 192 right? If I was going to do a static background in Photoshop at 256x192 ...what dpi should I do it at? 72dpi? Thanks.
I think PCX is most common :S Atleast with GBA... When I did some small games, I made pictures in photoshop, which had to be saved as PCX and then converted to a h-file and a c-file (C (prequel to C++) and it's header)...
