I followed the wiki instructions for using the official Wii U Gamecube controller adapter but encountered a problem with it that rendered the controller unusable. First, with my official GCN controller, it constantly thought that the joystick was being held down to the right. Unplugging it and replugging it in did not solve this problem. I tried using the controller with the same game (Mario Party 4) on my actual Wii and it worked fine. Next I tried my unofficial Madcatz controller and the controller didn't work at all. This controller works on the real Wii as well. In both cases the controller was in port 1. I'm using build 5.0-1639 at present.
If there's anything else I need to mention please let me know. Thanks.
If there's anything else I need to mention please let me know. Thanks.