This is a communication cable compatible with Game Boy Color and Game Boy Advance. Unlike standard communication cables, this cable is compatible with both Game Boy and Game Boy Advance. (Before turning on the console, switch the center box switch to Color or Advance.) Expansion port on the center box. By connecting a Nintendo official Advance-only communication cable, 3-player gameplay is possible. *Since I don't have the console on hand, the operation has not been confirmed. Please understand that the operation has not been confirmed before purchasing.