Wii U can use two GameCube controller adapters
![Wii U's GameCube controller will support more than just Smash Bros. [updated] | VentureBeat](https://venturebeat.com/wp-content/uploads/2014/10/wii-u-gamecube-controller-adapter-setup.jpg?fit=400%2C296&strip=all "Wii U's GameCube controller will support more than just Smash Bros. [updated] | VentureBeat")
Wii U's GameCube controller will support more than just Smash Bros. [updated] | VentureBeat
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/product/93/553524/1.jpg?7759 "915 Generation For Gamecube Controller Adapter For Nintendo Switch Wii U @ Best Price Online | Jumia Egypt")
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GTron Adapter | RetroRGB
WII U Gamecube控制器連接器【適用於WII U、NINTENDO SWITCH 和PC USB】 – DimBuyShop
