Question USB Game Controller Help


Oct 9, 2018
The shortest amount of background I can manage: I'm trying to make something à la this. I want to start with a raspberry pi based system and upgrade at some point to the m5 intel compute stick. I plan to replace the wii u gamepad controls (as much as i love them they are massive) and replace them (at least the joystick, dpad, and facebuttons) with nintendo switch joysticks or 3ds sliders and two dpads from a 3DS. I understand most modders use GC+ boards but seeing as they are sold out and I'm trying to make a usb controller I don't know that that is what I need. How would I go about turning these components into a usb controller?
Thank you in advance, and sorry if this is a bit vague