A case for making a USBRetro adapter for Gamecube/WII. Requires an rp2040-zero (Waveshare version recommended) and a Gamecube controller plug. Use a controller extension plug since those are easy and cheap to come by. I recommend to remove any excess metal off the controller plug to make fitting the plug into the print easier. Type A is more taller compared to type B but allows the plug and rp2040-zero to be easily placed inside and removed while type B is more compact but requires you to place the plug in the print first and soldering the wires to the rp2040-zero through the print.
USBRetro firmware: https://github.com/RobertDaleSmith/USBRetro Article guide that inspired this project: https://www.retrorgb.com/open-source-usb-to-gamecube-adapter-from-robert-dale-smith.html