This list is more for those that own a GBA flash card of some description
GBA Single Cart Multiplayer Link Games:-
- Advance Wars
- Advance Wars 2 - Black Hole Rising
- American Bass Challenge
- Bomberman Tournament
- Disney's Magical Quest Starring Mickey and Minnie
- F-Zero - Maximum Velocity
- F-Zero GP Legend
- Konami Collector's Series - Arcade Advanced
- Kurukuru Kururin
- Mario And Luigi Superstar Saga
- Mario Kart Advance
- Super Mario Advance
- Super Mario Advance 4 - Super Mario Bros 3
- Super Mario World - Super Mario Advance 2
- Woody Woodpecker In Crazy Castle 5
- Yoshi's Island - Super Mario Advance 3
this works by having 1 GBA with a Game inserted and 1 to 3 other GBA's linked but with no game inserted