yes. just connect the adapter to the wiiu

Didn't work. I'm trying to find if there is a hombrew app or something to be able to play with my GameCube controller.

You need to use the HBC app Gecko. Then you'll need your physical disc of your supported game, and the Action Replay code on your SD Card. Just look up Gecko code SSBB. youll find it prolly.

I strongly recommend watching a youtube video of "how to use a third party controller adapter to Nintendont", it'll beat having to buy an official adapter