How to rip sprites/backgrounds from Wonder Project J2?

[nonbirithm]

I reverse engineered the ROM and wrote a program for extracting the sprites here, although I haven't figured out backgrounds yet. The backgrounds seem to use a different segmentation format than the sprites but the individual pixels are clearly visible when decompressing the raw data and viewing it in a binary visualizer like binocle.



Those top pixels are where the segment offset and size are supposed to be for sprites, but I think they're palette data in this case.