Retropie Gameboy zero upgrade. replaced my 3ds joystick with a joycon joystick and Added lcd backplate. pictures in the comments : r/RetroPie
Amazon.com: Retropie Gaming Console ROMs 128GB microSD Card Preloaded Games for Raspberry Pi 3/3B+, Retropie Emulation Console Plug & Play Fully Loaded Game System Compatible with XBox/PS1 Controller : Video Games
PLAY NINTENDO DS GAMES ON RASPBERRY PI | RETROPIE EMULATION STATION | GUIDE - YouTube