When you play Galaga or Galaga Arrangement let your fighter get caught.Then use your other fighter to shoot the ship that has your fighter.You will get a double fighter.This is helpful in the challenging stage.
To "bring down the house," have the house meter filled and hold L1, R1,L2, and R2 at the same time. Then press the alley-oop button (triangle). After that it should show snap shots of the dunk. Finnaly the player should run away from the hoop(automatic).