PocketNes.org provides an emulator called Pocket NES for the Gameboy Advance
About PocketNes.org
PocketNES is a Nintendo 8-bit emulator for Gameboy Advance.For more info see the FAQ. For tutorials on how to get PocketNES to work see the How To. To get the emulator itself, go straight to the Downloads page!If you are having problems getting things to work, check out the troubleshooting. Current version of PocketNES is 9.
