I have one of these to tool around on, it's a streamlined Android box running cores. Supports Mame, SNES, GBA, GB/GBC, Genesis/Megadrive and NES/Fami roms, everything runs pretty nice for those that don't want to mess with configs. There's a 6500 game pack floating around that someone put together with artwork already and covers the aforementioned systems, throw it on a sd card and away you go