I do all that you told but im unlucky. The GBC VC injector get a error when I use the rom.gb renamed to rom.gbc. it tell me "this inst a gbc rom or its corrupted". When I open the rom.gbc on visualboy emulator it open without errors. I tryed 4 untoched roms from 4 diferent sites. Any new hint?
How you do that? I changed the original rom with the hack of color and sprites 2.0 and it worked but the colors dont work, i tried to modify the .patch file of red but I dont find anything an the method of Original post dont work on that rom.
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan