How to Play Gamecube Games on Wii: 8 Steps (with Pictures)
Nintendont homebrew allows GameCube games on Wii U | N4G
Mario Sunshine GC running on WiiU via wii mode through devolution wii-gc homebrew software, being played on WiiU controller screen using gamecube controller. Also plays with PS3 controller. : r/gaming
Rocket League Inspired Homebrew Reverses Onto Nintendo GameCube | Hackaday