5 April 15 Massive (0) I have just pushed out version 32 of the Wii U Gamecube adapter The biggest thing added to this release is full support of third party adapters With the general lack of first party adapters and the relative glut of the third party adapters, I figured this addition was well overdueBefore Dolphin The GameCube controller adapter is not supported in versions older than Updating to a newer version is necessary Dolphin to DolphinThe left slot on the adapter (while engraved "Wii U" facing up) is the first port, and so on, so don't mistake it for being the other way around!
Wii U Gamecube Controller Adapter From The Smash Bros Bundle Adapter Only