Gamecube Controller Adapter for Wii U - Solaris Japan
GameCube Controller Adapter for Wii U, Nintendo Switch and PC USB – Lexuma
Amazon.com: Gamecube Adapter for Nintendo Switch Gamecube Controller Adapter and WII U and PC, Super Smash Bros Gamecube Controller Adapter. Support Turbo and Vibration Features with 180cm Long Cable : Video Games
Mayflash GameCube Controller Adapter for Wii U and PC USB (4 Port) - Walmart.com
Confirmed: The Wii U GameCube Controller Adapter will not work on DDR, Active Life, or Cyberbike | Gaming.Fit
Amazon.com: Hyperkin 4-Port Controller Adapter for GameCube Compatible with Nintendo Switch/ Wii U/ PC : Video Games