To get all these controllers to to play nice with each other on one pc took 5 seperate retroarch installs running independent from one another, usb hub with switches, wii u adapter,
N64 Retrobit controller configuration | Recalbox Wiki
Wireless Game Controller for Windows PC/Raspberry Pi/PS3 Gamepad Rechargeable Gaming Joystick Portable Remote Joypad for Laptop/Desktop Computer,Emulator,RetroArch, Steam,Roblox,RetroPie,RecalBox : Amazon.ca: Video Games
RetroArch controller mapping - RetroBat Wiki
How to map xbox controllers in Retroarch and Mame core - YouTube
How to Setup a Controller on Retroarch on PC - YouTube
retroarch controller setup - YouTube
RetoArch - use of Xbox Guide button messes with Launchbox pause screen closout - Emulation - LaunchBox Community Forums
NSW Button Mapping for RetroArch - General - Libretro Forums