At the title screen, quickly rotate the Left Analog-stick counter-clockwise four times. If you entered the code correctly, you will hear a sound. Many objects will be bouncing during the game.
Game Shark Codes
Master Code (Must Be On) 0E3C7DF2 1853E59EEE8C9146 BCC17EFA
Infinite Lives P1 FE994223 BCA99BE6
Infinite Lives P2 FE994433 BCA99BE6
Play as Same Characters (2 Player Mode) DE80EB4A BCA99B84
Press Select for Extra Time 0E99D5F8 BCA99A81DE80EF82 FE199B83
Quick Score 0E994202 BCD99BE6CE994202 BCA99A82
Super Deformed People CE80EB42 BCA99B84
Super Hero DE80EB92 BCA99B84
Bouncy Stuff CE80EB4E BCA99B84