Hold L1, X, and DOWN, and then hold R2 until all the lights turn on. Now let go of the buttons except X and DOWN. If done correctly, you will do a backflip.
Bail
Press R1 + R2 + L1 + L2 to bail.
Bunny Hop
It is possible to bunny hop your dirtbike. While not moving, hold L1 (clutch) + X (gas) + Analog-stick Down. Then, hold R2 or L2 (preload) until the bar is full. Then, release L1 (clutch) and if done correctly, you should take off into the air. Level yourself out and complete the bunnyhop. It may be a little tricky at first, but it is fun to jump on buses and and other things. You can also bunny hop, going slowly (or any time you can pull a wheelie). However, it is easiest when going very slow or staying still.
Get Extra Air
When you're about to go off a jump, hold R2. On top of the gauge there are some colors that will light up. Try to make all of them light up, and then release R2 when you're about to leave the ground.
Get Less Air
Enter L2 and R2 just when you leave the ground.
Level Select
Start a game in 2-player mode. P1 should hold R1 and L2 and then press Up, Down, Left, Right, Triangle. Then P2 should hold Triangle, L2, R2 and X. Now you can select any level you want.
Pro Action Replay Cheats
(M)
EC8F6F4C 1456E60A
Infinite Career Points
4CA3D034 1456B00C
Infinite Freestyle Points
1CD6CAE0 E1DFB00C
Open all tracks and all modes
1CA4E0A8 61DFB00C
Open all movies
4CA4E0BC 1456B00C
3CA4E0BA 1456E70C
MegaJump
1CA70620 22D6E7A5
Speed burst
When on an incline, keep clicking the clutch button while on an incline. Your speed will gradually get up to 80 mph. A good place to try it on is the incline to the jump when u start out at the shaffter freestyle course.
Tricks
Get some air, then hold the Trick button and press the indicated button(s) to do the corresponding move:
Bar Hop: Press Triangle(2).
Can Can: Press Square(2).
Cat Nac: Press X, Circle(2).
Catwalk: Press Square, Triangle.
Cliff Hanger: Press Circle, Triangle.
Coffin: Press Triangle, Circle.
Cordova: Press Circle, Triangle(2).
Disco Can: Press Square(3).
Heart Attack: Press X, Triangle.
Heart Breaker: Hold Analog-stick Down until you have done a complete flip.
Heel Clicker: Press Triangle.
Helicopter: Press X, Triangle(2).
Indian Air: Press X.
Kiss Of Death: Press Circle(2).
La-Z-Boy: Press Circle, X.
McMetz: Press Triangle(3).
Mulisha Air: Press X, Square.
Nac Nac: Press Square.
No Hander: Press Circle.
Nothing: Press Circle, Square .
Pendulum: Press Square, Circle.
Rocket Air: Press X, Circle.
Rodeo Air: Press Triangle, X.
Saran Wrap: Press Triangle, Square.
Seat Grab: Press X(2).
Suicide Flip: Hold Analog-stick Up until you have done a complete flip.
Superman Indian: Press X(3).
Switchblade: Press Square, X.