So the solution would be finding out which build supports Battletoads if that's the only game you're trying to play. Testing it out on my own set up, it seems the newest build (0.146) doesn't play Battletoads, while my version of MAME32 Plus! Plus!, which uses 0.119, does. MAME has pretty shaky development due to the nature of trying to emulate EVERY arcade game, so one build may support a game while the next release may completely remove support for it. First of all, what build of MAME do you have/what build of MAME does the emulator you have use? It could be too old.