God mode

During game press 
up, down, up, up, circle, right, triangle, 
square, up, down, L2

Infinite special attack

at the password screen enter L1, T, L1, R1, R1, R1

Then start a game and get killed in your next life 
you will have unlimited special attacks. 

Advanced Attacks 

Freeze Left, Right, Up
Rear Fire Left, Right, Down
Invisibility Up, Down, Left, Right
Jump Up, Up, Left

 Play as Minion 
At the Password screen enter: 
Right, Right, Right, Left, Left.

Play as SweetTooth 
At the Password screen enter: 
Left, Left, Left, Right, Right.

Enter the following as Passwords  

God mode: L1, Square, X, R1, Start
Infinite Weapons: Triangle, Circle, Up, Right, Down
Cpu ignores health: Down, L1, Down, Start, Triangle
Cpu cars fight each other: L1, R1, L1, R1, R1
No pick-ups: Select, Select, R2, L2, Start
All pick-ups homing missiles: Start, R1, L1, Start, Start
All pick-ups napalm: Start, Start, L1, L1, L1 
All pick-ups power missiles Start, L1, Start, L1, Start 
No full healths: L1, Start, Start, Start, R1 
Slippery Surfaces: Up, Up, X, X, Up
99 Freeze Missiles: Triangle, Up, Circle, Right, Start
Solo Deathmatch: X, Circle, Circle, Circle, Circle
Enhanced Weapons: R1, R1, L1, L1, L1
Massive Force: Triangle, Circle, Down, Left, Up 
Massive Ricochet Bombs: Left, Right, Left, Right, Up
Homing Rain Missiles: Up, Down, Up, Down, Up
Enable Memory Card Screen: Start, Start, Start, Start, Start


Infinite Specials  
At the Password screen enter L1, L1, R1, R1, R1. Now start 
a Deathmatch and quit it.. You can now use the code in any 
part of the game until you turn the game off. 

Flower Power looking good 
At the Password screen enter Left, Square, Square, Square, 
Left. Now pick Flower Power and look at her bio to see a 
new outfit.

Warehouse Level  
At the Password screen enter Up, Up, Up, Left, Left. 
Now go to "Deathmatch" and choose any level & any car. 
Start the match and it will go to the warehouse level 
automatically. 

Warehouse Level 2  
At the Password screen enter Square, Square, Square, Left, 
Left and do the same as above. 

Disco Level  
At the Password screen enter Left, Left, Left, Square, Square 
and do the same as above.

Level 8 Final Passwords 

Hammerhead: Square,Up,Up,Start,Left
Outlaw: Circle, Left, R1, Up, L2
Flower Power: Select, Left, R1, R2, Left
Firestarter: L2, L2, Left, Square, R1
Spectre: Triangle, X, R1, Start, R2
Thumper: R1, R1, X, L1, Select
Auger: Circle, L1, Triangle, X, Down
Club Kid: L1, Circle, Start, Triangle, Left
Warthog: R2, L2, Down, X, Left
Axel:  L1, R1, Up, Left, Circle
Roadkill: Right, Square, Left, Start, Select
Mr. Grimm: Left, Right, L1, Left, L2
Sweet Tooth: Start, Triangle, Up, Square, L2
Minion: Down, X, Square, Down, Select

GameShark Codes 

Ammo Never Decrease for All players 
80033ed62400

Infinite Lives P1  
800d300c0002

Infinite Lives P2  
800d309c0002

Play As Minion  
800d28d00007

Play As SweetTooth  
800d28d0000b

 Infinite Turbo for All Players  
800201b22400

Infinite Special Meter for All Players 
8001975e2400

Level passwords: 

Auger 
D.C    X, Start, Left, Left, L2 
Hangar 18    Up, Down, Triangle, L1, R1 
North Pole   Left, X, Right, X, Square 
London L1, Right, X, Start, Left 
Tokyo  Circle, Circle, Left, Right, Left 
Egypt  Select, Right, L2, L1, L1 
Blimp  Circle, L1, Triangle, X, Down 
  
Axel 
D.C    L2, Triangle, Triangle, Square, Start 
Hangar 18    R1, Up, Down, Down, L1 
North Pole   X, Triangle, Square,R2, X 
London Up, L2, Circle, Square, L1 

Club Kid
London Select, Up, Circle, R1, Up 

FireStarter 
D.C    Left, R2, Square, L1, Up 
Hangar 18    L1, R2, X, Left, Down 
North Pole   Circle, R2, R1, R1, R2 
London Select, R1, Right, Square, Select 
Tokyo  Start, R2, Right, L2, Start 
  
Mr. Grimm 
D.C    Down, Down, Start, R2, O 
Hangar 18    R2, X, Triangle, Down, Right 
North Pole   Triangle, Down, Right, R2, R2 
London X, X, Square, Circle, Circle 
  
Outlaw 3
D.C    Triangle, Select, Down, Circle, L1 
Hangar 18    L1, R2, R2, Square 
North Pole   Start, Circle, Right, Up, L2 
London Up, R2, Triangle, Select, R2 
Tokyo  Left, Right, Up, Circle, X 
Egypt  L1, R2, X, Left, Start 
Blimp  Circle, Left, R1, Up, L2 

Roadkill
D.C    Start, Select, L1, Triangle, L2 
Hangar 18    Down, L2, Start, Right, Select 
North Pole   R2, Select, Triangle, R2, Up 
  
Spectre
D.C    L1, Square, Up, X, R1 
Hangar 18    Select, X, Down, Right, Start 
North Pole   Start, Down, Square, L2, Down 
London Down, X, L2, Triangle, L1 
Tokyo  R2, Down, Square, X, Up 
  
Thumper 
D.C    R2, Triangle, Left, Down,L2 
Hangar 18    Triangle, Up, Select, R2, Triangle 
North Pole   Square, R1, R2, Circle, Select 
London Start, Start, Select, Up, L1 
Tokyo  Right, R1, Triangle, Up, L2 
Egypt  L2, Start, Right, Left, Triangle 
Blimp  R1, R1, X, L1, Start 
  
Warthog
D.C    Select, L1, Left, Start, Left 
Hangar 18    Start, L1, Right, R1, L2 
North Pole   Down, L1, Start, L2, Square 
London R2, Triangle, Triangle, Start, Left 
Tokyo  Triangle, R2, Right, Left 
Egypt  Square, Square, Start, L1, Triangle 
Blimp  R2, L2, Down, X, Left