[lbschenkel]

It's not a "stretch", it is exactly that. It's widely known by anyone familiar with the hardware that Gamecube and Wii are basically the same console: it's the exact same architecture but the Wii has upgraded/faster components and (this whas the key:) different peripherals and bet on the motion controls. It's more or less like comparing the Intel 386SX with 20 MHz and the AMD 386DX with 40 MHz.

You could just ask the developers of Dolphin (Gamecube/Wii emulator). There's a reason for why the same emulator can emulate both consoles.