Original mode and play as Cynthia

Beat the game to access the "Original" selection on the "Game Mode" screen and to unlock Cynthia at the character selection screen.

Play as Spike

Beat the game with Cynthia with an IQ of over 400.

Control demo mode

Select the "Rules" option, highlight Demo 1, 2, or 3, then hold L1 + R1 and press X. The game play screen will now appear and the character may be controlled.