MX 2002 Cheats

Unlock level select:
Begin your game in two player mode. Have player one press and hold R1 + L2 and push Up, Down, Left, Right, Triangle. Now have the second player (Player 2) press and hold Triangle + L2 + R2 + X.
 

Bunny Hop:
You can do a bunny hop with your dirtbike. Press and hold Turbo then push Gas.
User Cheat by EricSmith  

Getting additional bikes:)
Pick between 125cc and 250cc, go through the game in career mode until the last level. Upon arriving get first place to unlock the option the alter your cc's on your dirtbikes in any mode.
User Cheat by EricSmith  

Bail:
Push R1 + R2 + L1 + L2 if you want to bail.
 

Moves:
 

180/360/... - Turn while in the air using the Analog-stick.
Bar Hop - Hold Trick and push Triangle, Triangle.
Can Can - Hold Trick and push Square, Square.
Cat Nac - Hold Trick and push X, Circle, Circle.
Catwalk - Hold Trick and push Square, Triangle.
Cliff Hanger - Hold Trick and push Circle, Triangle.
Coffin - Hold Trick and push Triangle, Circle.
Cordova - Hold Trick and push Circle, Triangle, Triangle.
Disco Can - Hold Trick and push Square, Square, Square.
Fakie - Do a 180 in the air, then hold Gas immediately after landing.
Heart Attack - Hold Trick and push X, Triangle.
Heart Breaker - Hold Analog-stick Down until you have done a complete flip.
Heel Clicker - Hold Trick and push Triangle.
Helicopter - Hold Trick and push X, Triangle, Triangle.
Indian Air - Hold Trick and push X.
Kiss Of Death - Hold Trick and push Circle, Circle.
La-Z-Boy - Hold Trick and push Circle, X.
McMetz - Hold Trick and push Triangle, Triangle, Triangle.
Mulisha Air - Hold Trick and push X, Square.
Nac Nac - Hold Trick and push Square.
No Hander - Hold Trick and push Circle.
Nothing - Hold Trick and push Circle, Square .
Pendulum - Hold Trick and push Square, Circle.
Rocket Air - Hold Trick and push X, Circle.
Rodeo Air - Hold Trick and push Triangle, X.
Saran Wrap - Hold Trick and push Triangle, Square.
Seat Grab - Hold Trick and push X, X.
Stoppie - As you are going, hold Analog-stick Forward and push Brake.
Suicide Flip - Hold Analog-stick Up until you have done a complete flip.
Superfly - Hold Trick and push X, X, Triangle
Superman Indian - Hold Trick and push X, X, X.
Surfer - Hold Trick and push Square, Triangle, Triangle.
Switchblade - Hold Trick and push Square, X.
Tail Whip  - Turn slightly way in the air, then straighten out with the Analog-stick.
Wheelie - Hold Analog-stick Down and push Gas.

Big air:
When your about to jump press and hold R2 until you get to full speed then press and hold Down for air.
 

Backflip on the ground:
To do this trick, you must master the bunny hop (press Preload then press X + Down on the Analog-stick). You have to push X + Down simultaneously and push those buttons about half a second after you press Preload. To do the backflip, just do a bunny hop and spin a backflip while in the air.
 

Frontflip on the ground:
This is done almost exactly the same way as the backflip, but you need to be moving. Start riding, then do the bunny hop -- only this time push Square + Up instead of X + Down. Keep holding Up to do a frontflip.
 

Taunt:
Play in multi-player mode and run out of time. Push Circle or X to taunt.

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