Unlock Battle Arena
Get all the grades, then you should get the 'Master' grade. This will open the Battle Arena in Robot Beach.

Level Skip
Press Start to pause the game, then hold R1 and press Square, Square, Square, O. Release R1, then hold L1 and press Triangle, Triangle. Release L1, then hold and press R1, Square, Square.

Upgrade Sword
Press Start to pause the game, then hold L1 + R1 and press O, Square, O, Triangle, Triangle, Square, O, Square.

Big Heads
Press Start to pause the game, then hold R1 and press Triangle, Triangle, Triangle, Triangle. Release R1, then hold L1 and press Triangle, Triangle. Hold R1 + L1, then press Triangle, O, Triangle.

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