Wii U 4-Ports GameCube Controller Adapter - Tomee - Walmart.com
TTX Tech GameCube Controller Adapter for Wii U and Switch - Micro Center
Amazon.com: Mayflash GameCube Controller Adapter for Wii U and PC USB, 4 Port 2-Pack : Video Games
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
GameCube® Controller Adapter - XYAB
GameCube Controller Adapter for Wii U and PC USB Two ports
Nintendo Official Wii U GameCube Controller Adapter BRAND NEW SEALED! | eBay
GameCube Controller Adapter for Wii U, Nintendo Switch and PC USB – Lexuma
GameCube Controller Adapter 4 Port Compatible with Nintendo Switch Wii U & PC USB
GameCube Controller Adapter for Wii U, Nintendo Switch and PC USB by L
SEALDE Official GameCube Controller Adapter Switch Wii U Super Smash Bros + Gift | eBay
Wii U's GameCube controller will support more than just Smash Bros. [updated] | VentureBeat