GameCube Controller Adapter for Wii & Wii U (Dual Pack), White
GameCube Controller Adapter for Nintendo Wii U and PC USB - 4 Ports Connection Tap Converter for Multi-Player Games Black [Nintendo Wii U] - Walmart.com
CE Compass GameCube Controller Nintendo GC and Wii Compatible GameCube Video Game Console Remote Gaming Joystick Gamepad Joypad, White
Confirmed: The Wii U GameCube Controller Adapter will not work on DDR, Active Life, or Cyberbike | Gaming.Fit
How to Use a Gamecube Controller on a Wii: 5 Steps (with Pictures)
GameCube Controller Adapter for Nintendo Wii U and PC USB - 4 Ports Connection Tap Converter for Switch Wii-U PC - Walmart.com
Amazon.com: Gamecube Controller Connection Tap for Wii U : Video Games
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
How to Connect a GameCube Controller to the Wii - Howchoo
Wii U's GameCube controller will support more than just Smash Bros. [updated] | VentureBeat
Mayflash GameCube Controller Adapter for Wii & Wii U (Dual Pack), White - Walmart.com