RegionFrii
From WikiTemp, the GBAtemp wiki
Information
SYNDiCATE have released a tool that allows you to patch NTSC game images to change their region code to PAL, so they can be played back on PAL Wii units in conjunction with any modchip.
The tool works by modifying a section in the image that contains region information. Surprisingly; this area is said to be unencrypted.
Download
Download 'SYNDiCATE RegionFrii' here