Picked this up recently, a Super Famicom Super Game Boy specialty controller : r/snes
Super Game Boy Commander - Hori's Ultimate SGB Controller - PugHoofGaming
HISPEEDIDO USB Type C GBA wired wireless Controller Portable Station Dock For Game Boy Advance Console GBA Switch Station Stand _ - AliExpress Mobile
Wireless Gameboy Controller Device from insideGadgets on Tindie
Amazon.com: Old Skool DIGITAL CONTROLLER COMPATIBLE WITH GAMECUBE & GAMEBOY PLAYER -,Black : Video Games
Wireless Gameboy Controller Device from insideGadgets on Tindie
Amazon.com: Hyperkin SmartBoy Mobile Device for Game Boy/ Game Boy Color (Android USB Type-C Version) : Video Games
Nintendo Switch Custom Joy-Con GameBoy Themed Game Boy Controllers Joy Cons | eBay
Digital Controller compatible with GameCube & Game boy Player (Old Skool) - Stone Age Gamer
eXtremeRate Clear Glacier Blue Replacement Full Set Buttons for Gameboy Advance GBA - Handheld Game Console NOT Included - Walmart.com
Playing GameBoy with a controller for no reason - YouTube
G1323B HPLC Gameboy Controller
Game Boy Android Gamepad - Instructables
Set of retro video game consoles. Tamagotchi, gamepad, gameboy, controller. Simple, cartoonish style. Elements for design and illustrations. Bright colors. Stock Vector | Adobe Stock
Hyperkin SmartBoy review: Turn your Android phone into a very dumb Game Boy | PCWorld
SmartBoy Mobile Device for Game Boy/ Game Boy Color (Android USB Type-C Version) - Hyperkin
Hyperkin SmartBoy Mobile Device- Android USB Type-C Version for GameBoy/ Game Boy Color - Walmart.com