Nintendo of America on Twitter: "Get excited! The #WiiU version of #SmashBros. will be playable with GameCube controllers. http://t.co/nmyj9QMsuU" / Twitter
White Wii U GameCube Controller Adapter Spotted - News - Nintendo World Report
GameCube Controller Adapter for Nintendo Wii U / Switch / PC
Gamecube Controller Adapter for Wii u and 4 Port Black Super Smash Bros GameCube Adapter for Wii u PC USB Switch - Newegg.com
Amazon has a Gamecube controller adapter for Wii U - NintendoToday
GameCube Controller Adapter for Wii U + Nintendo Switch [Nintendo Accessory] | Walmart Canada
How to Use a Gamecube Controller on a Wii: 5 Steps (with Pictures)
Guide to the Best GameCube Controller Adapter for Nintendo Switch
GameCube Controller Adapter for Wii U, Nintendo Switch and PC USB by L
Nintendo Wii /GameCube CirKa Controller Silver Controller - Walmart.com
Mayflash GameCube Controller Adapter for Wii & Wii U (Dual Pack), White - Walmart.com
How to Connect a GameCube Controller to the Wii - Howchoo
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Super Smash Bros. GameCube Adapter for Wii U - Adapter Edition: Wii U: Video Games - Amazon.ca
List of Wii games with traditional control schemes - Wikipedia
GameCube Controller Adapter for Wii U
Nintendo GameCube controller adapter coming to Wii U for Smash Bros. - Polygon
How to Connect a GameCube Controller to the Wii - Howchoo
Mayflash Nintendo GameCube Controller Adapter for Wii/Wii U (WII-3318) - Walmart.com
Controller Adapter for Wii U with White GameCube Controller (Play-Asia.com Bundle)
Wii U Gamecube Adapter (Violet)
Confirmed: The Wii U GameCube Controller Adapter will not work on DDR, Active Life, or Cyberbike | Gaming.Fit