FCE Ultra GX is a port of FCE Ultra. With it you can play NES games on your Wii/GameCube. The GUI is powered by libwiigui.

Wiimote, Nunchuk, Classic, and Gamecube controller support
iNES, FDS, VS, UNIF, and NSF ROM support
1-4 Player Support
NES Zapper support
Custom controller configurations
SD, SDHC, USB, DVD, SMB, Zip, and 7z support
Cheat support (.CHT files)
IPS/UPS automatic patching support
NES Compatibility Based on FCEUX 2.1.4

3.2.7 - January 14, 2012
Updated core to latest FCEUX (r2383)
More accurate pixel scaling (thanks eke-eke!)
Other minor changes