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Confirmed: The Wii U GameCube Controller Adapter will not work on DDR, Active Life, or Cyberbike | Gaming.Fit
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GameCube Controller Adapter for Wii U, Nintendo Switch and PC USB – Lexuma
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Guide to the Best GameCube Controller Adapter for Nintendo Switch
How to Use a Gamecube Controller on a Wii: 5 Steps (with Pictures)
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Here's how to get Wii U's GameCube Controller Adapter working on Windows | VentureBeat
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GameCube Controller Adapter by Nintendo for Wii U New in Box Factory Sealed CIB | eBay
List of GameCube Controller-compatible Wii video games - Codex Gamicus - Humanity's collective gaming knowledge at your fingertips.
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GC Controller Adapter for Wii/Wii U (PLAY-ASIA.COM Edition) for Nintendo Wii, Wii U