Hold the red button under the flap of the system, and the same button under where the batteries are. IF they doesnt work, you probably have to go to the 4 player options screen in game.
[quote name='lt_homer']Hold the red button under the flap of the system, and the same button under where the batteries are. IF they doesnt work, you probably have to go to the 4 player options screen in game.[/QUOTE]