raphnet. - N64/Gamecube controller to Wiimote adapter
Just Got One of Those Gamecube Controllers That Plug Into the Wii Remote. What's the Difference Between These and the Actual Gamecube Controllers? : r/smashbros
Amazon.com: Mayflash GC Controller Adapter for Wii & Wii U (Dual Pack), White : Video Games
Amazon.com: Super Smash Bros. GameCube Adapter for Wii U : Nintendo Gamecube Controller Adapter: Video Games