After you have selected your guy, go to "options" then "password". Punch in square,triangle,circle,square,square. Then you will be in the arena with about 5 or 6 guys. Enjoy!
Cheats
TO FIGHT MINION AT THE LAST STAGE WITH THE OTHER THREE PEOPLE AT THE SAME TIME= IN THE PASSWORD SCREEN PRESS TRIANGLE, X, O, SQUARE, TRIANGLE
ONE FULL HIDDEN RECHARGE= AT THE FREEWAY LEVEL GO STRAIGHT AND TAKE THE LEFT IN THE FIRST TUNNEL, TO YOUR LEFT YOU WILL SEE A WHITE CAR, BLOW IT UP WITH YOUR MACHINE GUNS AND STAND ON IT AND IN A COUPLE OF SECONDS, BANG YOU ARE FULLY RECHARGED!
AT THE ROOFTOP LEVEL DRIVE BACKWARDS FROM A DISTANCE INTO THE PYRAMID WITH SPECTRE AND YOUR INSIDE.
Extra Cars
To get Sweettooth,Go to the car selection screenin a single player tournament and enter the following code: Up,L1,Trangle,Right. To get Minion,do the same as the fisrt one and enter the following code:L1,up,down,left. Unlimited Ammo: During a match,the l and the r buttons the press, up,down,left, right,left,down,up.
Passwords
After you select a car, there will be be a password option. Here are some passwords.
stx_o=invincilbility
t_soo=infinate weapons
stoss=secret level
s=square, t=trinangle,o=circle, x=x