Amazon.com: Gamecube Controller Adapter for Switch/Switch OLED.Gamecube Adapter Compatible with PC Wii U.Adapter with 4 Ports 6 FT(1.8M) Cable Support Turbo and Vibration Features Super Smash Bros : Video Games
How to Use the GameCube Controller With Nintendo Switch | Support | Nintendo
Amazon.com: 8Bitdo Gbros. Wireless Adapter for Nintendo Switch (Works with Wired GameCube & Classic Edition Controllers) - Nintendo Switch : Everything Else
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
GameCube controller support comes to Nintendo Switch - Polygon
TTX Tech GameCube Controller Adapter for Wii U and Switch - Micro Center
GameCube Controller Adapter for Switch (also Wii U / PC) | old-skool
GameCube Controller Adapter for Wii U, Nintendo Switch and PC USB by L