Things You'll Need
Instructions
Plug the link cable into the port marked "EXT" on the top edge of the GameBoy Advance units.
Insert the game cartridges into the cartridge slot on the game units and power them both on.
Press the "Start" button on both GameBoys to access the game's main menu, then select the "COMM" option to access the mutiplayer functions.
Select the "Battle" option on both machines to begin the fight.