WHOA! GameCube Adapter Works on Nintendo Switch! - We Show it Off! - YouTube
Adapter for Gamecube Controller, Super Smash Bros Switch Gamecube Adapter for WII U, Switch and PC. Support Turbo and Vibration Features. No Driver and No Lag & Gamecube Adapter - Walmart.com
GAMECUBE CONTROLLER ADAPTER FOR SWITCH (ALSO WII U / PC)
8Bitdo Gbros Adapter for Nintendo Switch (Works with Wired Gamecube & Classic Edition Controllers) - Stone Age Gamer
Unboxing Official GameCube Controller and Adapter for Switch! - YouTube
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