Game Boy Color EXT Link Port | GBC | Hand Held Legend
Custom Gameboy Link Cable - Etsy
Game Link Cable - Wikipedia
Rock 30 Games
Amazon.com: CSTESVN GBC Link Cable, 2 Player Link Cable Connect Cord Compatible with Nintendo Gameboy Color, Game Link Cable for Gameboy Color/Pocket/Light, 3.9Ft Black : CSTESVN: Video Games