How to Use a Gamecube Controller on a Wii: 5 Steps (with Pictures)
GameCube - Wikipedia
GameCube Controller for Nintendo Wii and GameCube [2 Packs]
How to Connect a GameCube Controller to the Wii - Howchoo
raphnet. - Gamecube controller to Wiimote adapter
TIL You can use gamecube controller in Mario Kart Wii : r/wii
Wii U's GameCube controller will support more than just Smash Bros. [updated] | VentureBeat
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
Turns Out The GameCube Controller Adapter Won't Be Compatible With Other Wii U Software - Nintendo Life
Can you use Nintendo GameCube controllers with the Wii? - Quora