After noticing that this game stores a lot of its overworld character sprites in raw form, I decided to rip them with YY-CHR. It went pretty well, but I've kind of given up on finishing it because of the tedium of filling them with their correct colors, and because I think some of the sprites may still be compressed like most everything else. Being that the game was never translated, trying to screenrip everything would be a huge pain as well.
I think I'll post the incomplete sheet here anyways, in case it's useful to someone. Feel free to use it without credit. Maybe I'll come back to finish it some day and actually submit it to the site, I don't know.