SNES9x GX is a Super Nintendo emulator for Wii and GameCube based on the PC emulator SNES9x 1.51. SoftDev is responsible for the original SNES9x 1.51 GameCube port, whose work was continued by crunchy2. Wii support was added by michniewski, and SNES9x 1.51 was ported by Tantric. The project is currently being maintained by michniewski and Tantric. The GUI is powered by libwiigui.

Features:

* Based on Snes9x 1.51
* Wiimote, Nunchuk, Classic, and Gamecube controller support
* SNES Superscope, Mouse, Justifier support
* Cheat support
* Auto Load/Save Game Snapshots and SRAM
* Custom controller configurations
* SD, USB, DVD (requires DVDx), SMB, Zip, and 7z support
* Autodetect PAL/NTSC, 16:9 widescreen support
* Original/filtered/unfiltered video modes
* Turbo Mode – up to 2x the normal speed
* Zoom option to zoom in/out
* Open Source!

Changes:

[4.1.5 – December 23, 2009]
* Changed default folders to snes9xgx/roms and snes9xgx/saves. Old folders
will be automatically moved to the new location
* File browser now scrolls down to the last game when returning to browser
* Auto update for those using USB now works
* Fixed scrollbar up/down buttons
* Minor optimizations

Free and legal SNES roms to try out with this emulator can be found here: http://www.pdroms.de/files/supernes/

Source: http://www.wiibrew.org/wiki/Snes9x_GX

http://code.google.com/p/snes9x-gx/