Unlocked all characters except for Hyuuga Hanabi (small Hyuuga Girl) and Yondaime (Hokage 4)
At the main menu, hold R1 + R2 and press Square, Triangle, Square,
Triangle. Release R1 + R2, then hold L1 + L2 and press Right, Up, Right,
Up. Release L1 + L2, then press L3 + R3. If you entered the code
correctly, you will hear a sound.
