This isn’t necessary if your laptop or desktop has free slots for both the USB cables, but is necessary if it doesn’t. This is the application you’ll need to get your Gamecube controller set up properly with Dolphin. If the adapter is wired and works with the Switch or Wii U, chances are it’ll work here, too. We recommend either Nintendo’s official adapter or the MayFlash Adapter for the best results. Additionally, you might find that some controllers that look like GC pads but are actually Switch Pro Controllers.
While unofficial options work, they are much worse in build quality.
To use a real Nintendo GameCube controller with Dolphin, here’s what you’ll need: