Clever software folk have brewed up a way of booting legal GameCube discs, region free, on Wii.
Instead of dabbling with freeloaders and chipping the Wii console, players can now load any retail GameCube game (not pirated/DVD backup) from the Wii menu. Currently the Wii's GameCube engine is locked to wherever the console was purchased.
Using the software is simple, according to Wiibrew:
Just copy the GCBooter folder into your /apps/ folder on your card and run it via the homebrew channel. Insert your GameCube disc and press A on the GameCube controller a few times.