Play Your Gamecube Backups on Wii U (Guide)
How to Install the Homebrew Channel on the WII U. This guide is working As of October 2015 on Version 5.4.0 U.
How to Install the Homebrew Channel: https://goo.gl/9DNOzk
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How to Play Emulators on the Wii U: https://goo.gl/OUJaxN