How to Connect a GameCube Controller to the Wii - Howchoo
Ten things that surprised us about the Wii U hardware (updated) | Ars Technica
Is there a way to use the wii controller in Nintendo Gamecube games in a wii console? - Quora
Amazon.com: SogYupk Replacement for Wii Motion Plus Adapter,Compatible with Wii Remote Controller (White 2 Pieces) : Video Games
wii plug in controller | eBay
Just Got One of Those Gamecube Controllers That Plug Into the Wii Remote. What's the Difference Between These and the Actual Gamecube Controllers? : r/smashbros
Amazon.com: PowerLead Pro Controller for Wii U, Wireless Controller for Nintendo Wii U Controller Gamepad Joystick Dual Analog Game Controller (Black) : Video Games
How to Use a Gamecube Controller on a Wii: 5 Steps (with Pictures)