Visual Boy Advance GX is a Game Boy Advance / Game Boy emulator for Wii and GameCube based on VBA-M.

Features:

Wiimote, Nunchuk, Classic, and Gamecube controller support
SRAM and State saving
IPS/UPS/PPF patch support
Custom controller configurations
SD, USB, DVD, SMB, Zip, and 7z support
Compatiblity based on VBA-M r927
MEM2 ROM Storage for fast access
Auto frame skip for those core heavy games
Turbo speed, video zooming, widescreen, and unfiltered video options

Changes:

[2.1.8 – July 14, 2010]
* Ability to use both USB ports (requires updated IOS 202 – WARNING: older versions of IOS 202 are NO LONGER supported)
* Hide non-ROM files
* Other minor improvements

http://code.google.com/p/vba-wii/