C-stick, activate: Wii U to receive GameCube controller adapter | Ars Technica
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Confirmed: The Wii U GameCube Controller Adapter will not work on DDR, Active Life, or Cyberbike | Gaming.Fit
Confirmed: The Wii U GameCube Controller Adapter will not work on DDR, Active Life, or Cyberbike | Gaming.Fit
Tutorial: How to use your GameCube Controller Adapter for Wii U on the vWii - YouTube
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Wii U GameCube Controller Adapter Available to Order Along With 'Super Smash Bros.' GameCube Controller | High-Def Digest
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GameCube Controller Adapter for Wii & Wii U (Dual Pack), White
Wii U's GameCube controller will support more than just Smash Bros. [updated] | VentureBeat
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Mayflash GameCube Controller Adapter for Wii & Wii U (Dual Pack), White - Walmart.com
Nintendo's official Wii U Gamecube controller adapter! : r/smashbros
White Wii U GameCube Controller Adapter Spotted - News - Nintendo World Report
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Dolphin Emulator - How to use the Official GameCube Controller Adapter for Wii U in Dolphin
Amazon.com: Y Team Controller Adapter for Gamecube, Compatible with Nintendo Switch, Super Smash Bros Switch Gamecube Adapter for WII U/PC with 4 Port : Video Games