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Smash Bros branded GameCube controllers coming to Wii U | WIRED UK
Gamecube Video Game Console Starter Kit by REVOLT Gamer - Original Type Wired Gamepad Controller, AC Adapter, and AV Composite Cable (Platinum) - Walmart.com
MayFlash N64 Controller Adapter for Nintendo Switch Windows PC USB | eBay
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GameCube Controller Adapter for Wii U for Wii U
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raphnet. - Gamecube controller to N64 adapter (v3)