How can we use GameCube controllers with Nintendo Wii ?

The console features what we're calling a GameCube docking station. When Wii is standing vertically, the GCN docking station is located at the top of the unit. A flap opens to reveal four GameCube controller ports and two GCN Memory Pak slots. Players simply plug in their GameCube controllers and Memory Paks and they are fully compatible with GCN games on Wii.