Nintendo Wii U & Switch GameCube Controller Adapter - OFFICIAL OEM | eBay
GC Controller Adapter for Wii/Wii U (PLAY-ASIA.COM Edition) for Nintendo Wii, Wii U
raphnet. - Gamecube controller to Wiimote adapter
How to Use a Gamecube Controller on a Wii: 5 Steps (with Pictures)
Gamecube Controller Adapter for Wii U - Solaris Japan
Amazon.com: Super Smash Bros. GameCube Adapter for Wii U : Nintendo Gamecube Controller Adapter: Video Games
Classic controller to Gamecube/Wii adapter – Performance Gaming
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
Request] GameCube controller mod to enable use on home screen to select channels or to start game disk : r/WiiHacks
Mayflash GameCube Controller Adapter for Wii & Wii U (Dual Pack), White - Walmart.com
Wii U Gamecube Adapter (Violet) for Windows, Wii U, Android
4-Port Controller Adapter for GameCube® Compatible with Nintendo Switch® / Wii U® / PC/ Mac®