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Retropie Gameboy zero upgrade. replaced my 3ds joystick with a joycon joystick and Added lcd backplate. pictures in the comments : r/RetroPie
Classic Lcl-pi Boy Handheld Retro Game Console Raspberry Pi 3b/3a+ Video Gaming Player 3.2 Inch Ips Screen Built-in 5000+ Games - Handheld Game Players - AliExpress