raphnet. - Classic controller to Gamecube/Wii adapter
Amazon.com: 2pcs 1.8M 6ft Extension Cable for Nintendo NES Classic/Mini Edition Controller and Wii Nunchuck and Wii Classic Controller Extension Cords Extender (NES Classic Mini Extend Cable) : Video Games
Classic Game Room - Wii CLASSIC CONTROLLER PRO review - YouTube
Classic Controller - Wikipedia
USB Wii Classic Controller : 14 Steps - Instructables