Well if there really was Biohazard 0 on this board it could be checked. Biohazard was propably a 512Mbit rom file. Megaman is only 256Mbit. Usually these boards did not got deleted fully but just overwritten. So the last 256 Mbit of that Biohazard Zero could be still there (but there a several "If's" here). In order to check this, the full 512Mbit of this Board needs to be dumped and the rom file needs to be checked for BH0 remains. But afterall, only the last 256Mbit won't do much.