Ayaneo's Pocket DMG Android Handheld Is a Blacked-Out Game Boy With a Joystick
I created a custom joystick controller for sms using a Gameboy shell and a Konami hyperboy. Joystick has adjustable tension and buttons are spring loaded : r/MasterSystem
The Clippad mobile accessory turns your smartphone into a renegade GameBoy Advance! - Yanko Design
Micro Control Stick Joystick Controller for Nintendo Gameboy Pocket Game Boy
Boosterboy Joystick Saitek Gameboy Booster
Playing GameBoy with a controller for no reason
Controller:Game Boy Advance - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game
Wireless NES Controller + Game Boy Music Emulation; Joystick History - CDM Create Digital Music