Enter the following codes to get the desired effect:
At the title screen press R1, Up, L2, Down
At the Map Screen press Left, Left, Up, Down, L1 + L2 + R1 + R2.
Go to the Option Screen, highlight the 'Credits' option and press Left, Right, R1, R2, L2, L1, Up, Down. A 30-second timer will appear in the upper-right hand corner. Press the X button repeatedly on both or either controllers to gain up to thirty credits More Continues