Beast Wars: Transformers

Level Skip
Pause the game, then hold L2 and press Up, Down, Left, Right, Triangle, X, X, Triangle, Right, Left, Down, Up. Continue to hold L2 and unpause.

Power up weapons
Pause the game. Press and hold L2 then press up, down, left, right, triangle, x, square,and release L2. Quickly unpause the game to have a stronger weapon.