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.

Changes:

* New core! Updated to Snes9x 1.52. Old save states will not work!
* DVD / USB 2.0 support via IOS 202. DVDx support has been dropped. It is highly recommended to install IOS 202 via the included installer
* Multi-language support (only French translation is fully complete)
* Thank you to everyone who submitted translations
* SMB improvements/bug fixes
* Minor video & input performance optimizations
* Now uses .srm files without “Auto” appended, if found
* Added option to disable crosshair

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/