PaRappa the Rapper Cheats

Complete the first two levels with a "Cool" rating. Press X(3), Triangle, Circle, Triangle, Square(2), Right, Left, Square, X and finish the next level as usual. On the level 4, press X, Square, Triangle, Circle, X to allow Parappa's voice to be changed. Hold R1 and press Circle or Triangle to cycle through the voices of the other characters in the game.

When you are rapping on any level, hold the button Up. You will notice some extra scenes. These scenes are different depending on the level.