@Doomguy666: Aw hell yea, Gameboy rumble-carts. They actually take a AAA. I have two of those, Pokémon Pinball and Pokémon Pinball but it's the Japanese version. The latter of which can only toggle the rumble on and off while the former can adjust it. They're so friggin cool, if a bit of a pain in the behind to store conveniently, much like the Kirby gyroscope-cart