Thank me now or thank me later :D
Long story short: When I first got my android phone, I bought apps called (SNESNoid, Gameboid, etc...) They are emulators for Gameboy, SNES and such for the Android phone. Well they were pulled off the market for obvious reasons and when I changed phones, I lost them (Even saving to SD card :( )
Well I found them and for free.
GameBoid | SlideME
This is the gameboy emulator and I've been playing it for the last week (Action replay/Game shark built it :yay: ) The guy called "yongzh" makes these and if you search around that site you will find tons of stuff. Emulator Roms is a nice app that finds the roms for you so you can play them. I've been rocking about 10 different games and lovin it :D
TL:DR Search around link and turn your android phone into a SNES/Gameboy/Sega