FCE Ultra GX is an NES emulator based on FCEUX. With it you can play NES games on your Wii/GameCube. The GUI is powered by libwiigui.

Features:

* Wiimote, Nunchuk, Classic, and Gamecube controller support
* iNES, FDS, VS, UNIF, and NSF ROM support
* 1-4 Player Support
* Zapper support
* Auto Load/Save Game States and RAM
* Custom controller configurations
* SD, USB, DVD, SMB, Zip, and 7z support
* Custom controller configurations
* 16:9 widescreen support
* Original/filtered/unfiltered video modes
* Turbo Mode – up to 2x the normal speed
* Cheat support (.CHT files and Game Genie)
* Famicom 3D System support
* IPS/UPS automatic patching support
* NES Compatibility Based on FCEUX 2.2.0+ (r2818)
* Open Source!

Changes:

* Hide saving dialog that pops up briefly when returning from a game
* Don’t ignore buttons when zapper is enabled. prevented “Gotcha! The Sport!” from working (thanks liuhb86!)

Free and legal NES roms to try with this emulator can be downloaded from here.

http://code.google.com/p/fceugc/