Infinte Money
     At the title screen, press L1 + L2 + R1 + R2, then press Square +
Triangle,  Start.  The Map Selection screen will appear, and hold L1 +
L2 + R1 + R2 and press Circle. If done correctly, you'll hear a sound.
To increase your money, pause the game, then press Left, Right, Up, or
Down to increase the amount of money.