NES, SNES, N64, GC, Wii, WiiU...All Nintendo Controllers working on the Switch - YouTube
raphnet. - SNES controller to Wiimote adapter
Classic Super Famicom Controller For Wii
raphnet. - SNES controller to Wii/Gamecube cable
Amazon.com: My Arcade Super Gamepad - Wireless Gaming Controller for Nintendo SNES Classic, NES Classic, Super Famicom, Wii, Wii U (Super NES Colors) : Video Games
The mini NES Classic controller works with your Wii U Virtual Console games - Polygon
B.O.S.S. Wii controller brings back the SNES, for the huge | Ars Technica
Wii SNES Classic Controller Review - Review - Nintendo World Report
raphnet. - SNES controller to Wii/Gamecube cable
Mayflash Wii to NES fix tutorial | Satoshi Matrix's Blog
Adapter brings old-school Nintendo controllers to Wii Virtual Console | TechCrunch