Dolphin, the GameCube and Wii emulator - Forums

Yeah, I did try playing Mario Kart Wii with my PS3 controller before and it was fine. For PC games though, most of the HUD will be for Xbox. Can be a bit confusing.

A few sticky labels are a lot cheaper than a whole new controller, though, although I imagine they'd look a bit shabby. Maybe someone makes new 'keycaps' with XBox labels.