Because the Wii U contains a stripped down Wii It Is capable of natively playing GameCube but due to a lack of controller, memory card and a different disc drive that was
Nintendo won't confirm download GameCube games for Wii U – Destructoid
Wii U Does Not Play GameCube Games - Giant Bomb
Nintendo Wii U: Nintendo Has Confirmed That Gamecube Games Won't Work On Wii U - My Nintendo News
How to Play GameCube Games on Wii U - YouTube
Can Your Wii Play GameCube Games? - DKOldies: Retro Game Store
Las previsiones de Wii U son mayores que las de GameCube pero menores que Wii - Nintenderos
Can a normal disc drive read GameCube discs (unlike Wii with DVDs)? - Quora
Can You Play GameCube Games on Wii U & How to Do?
What Happens When you put a Nintendo GameCube game in the Wii U - YouTube
How to Play GameCube Games on Wii U |Nintendont| - YouTube
Wii U - Wikipedia
10 GameCube Games That Should Be Downloadable On Wii U
Wii U virtual console will have GameCube games, says Nintendo
File:GameCube disc.png - Wikimedia Commons
Nintendont permite que juegues Gamecube en Wii U
Cómo jugar juegos de Gamecube en Wii: 8 Pasos
Emuladores de Nintendo: Switch, Wii, Wii U, Nintendo 64, Game Boy, DS, NES y SNES
How to Play GameCube Games on Your Wii U With Nintendont
How to play GameCube games on the Wii U gamepad - YouTube