Amazon.com: Retroflag SUPERPi Case with Wired Controller for Raspberry Pi 3B+,2B,3B Deluxe Edition JCase Set : Electronics
Amazon.com: 2.4 GHz Wireless USB SNES Controller for Super Classic Games, iNNEXT Retro USB PC Controller Compatible for Windows PC MAC Linux Genesis Raspberry Pi Retropie Emulator [Plug & Play] [Rechargeable] :
Recalbox vs Retropie: Which retro gaming OS should you use? | SHB
EmulationStation - RetroPie Docs
How To Set Up RetroPie 3.5 on Raspberry Pi 2 – Part 2 | Delightly Linux