Nintendont -, Yes, you CAN play GameCube games on your Wii U!

Like all homebrew and modification, INSTALL AT YOUR OWN RISK. Nintendo so far have shown they will not ban any users for hacking Wii mode on the Wii U, but it may void your warranty. This is purely a modification of the Wii Mode on Wii U and will not touch or affect anything on Wii U mode at all

raphnet. - Gamecube controller to Wiimote adapter

Nintendont - Yes, you CAN play GameCube games on your Wii U

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Play GameCube Games on the Wii U Gamepad!

Would this work for playing pikmin 1 and 2 on WiiU? : r/Pikmin

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Nintendont Method

Because the Wii U contains a stripped down Wii It Is capable of

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Nintendont Method