Get Everything:
Go to the main menu and press Triangle, L1 + Left, Square, Triangle, L1 + Right, R1 + Down, R1 + Right, Select

Get All bikes:
Go to the main menu and press L2 + Square, L1 + Right, L2 + Circle, L1 + Left, Square

Get All tracks:
Go to the main menu and press Triangle, Right, L1 +R1, Square + Circle, L2 + Circle, Square

Get 250 cc Freestyle:
Go to the main menu and press Up, L1 + Up, Square, L1 + Right, L2 + Down, L1 + Left

Get All riders:
Go to the main menu and press Right, L1 + Right, Down, L1 + Left, Right, Square

Get a CRF250R:
After completing Career mode PRO 125 and moving on to select a new bike select a CRF450 complete the 250 mode with that bike, once you have finished the game you can play a 125 motocross track and when you choose a bike choose your cr450 and it will be a crf250 because it will be in a 125 mode.

Get Elrod the Viking:
To get Elrod you must win the "Lift Tower Challenge".to win this you must first start one player freestyle and do the Rock Ridge Freestyle course. keep going till u reach the set of "half pipes",go to the end and turn right,u shold see arock next to 2-3 signs.Go past the rock and turn around pick some speed and off the other side onto the Lift Tower. Ride on the cables till you get onto the other side,u should be awarded a special trophy. And then u have Elrod the Viking.

Bunny Hop:
To do a bunny hop stop and hold Clutch(L1),back,X and Preload(L2 or R2). wait till you've fully preloaded then release Clutch...and Voila...A bunny hop.If thats too hard Try this:Hold back,X and Preload,wait till youve preloaded and you will do a bunny hop not as high as the other one but a fast, Quick bunny hop

easy money:
To get easy money go to the tutorials and select one. Then hit x until all the words go away.Then when its time to start hit pause and exit the game. and it gives you money

All Tricks:
MX SUPERFLY All Tricks
hold L2 and R2 befor a trick
x tap/superman seat grab
x press/superman indian
x hold/superfly

o tap/no hander
o press/nothing
o hold/nothing mute

triangle tap/ heel clicker
triangle press/roadio air
triangle hold/extended roadio air

square tap/ nac nac
square press/nac nac lookback
square hold/1 handed nac nac

x+x tap/mulisha air
x+x press/mulisha indian air
x+x hold/rock solid

o+o tap/la-z-boy
o+o hold/extended la-z-boy

triangle[2] tap/bar hop
triangle[2] press/stail fish
triangle[2] hold/extened stail fish

square[2] tap/cat nac
square[2] press/9 o' nac
square[2] hold/1 handed 9 o' nac

x+triangle tap/hert attack
x+triangle press/heilcopter
x+triangle hold/executioner

x+square tap/stroke
x+square press/tsuami
x+square hold/kiss of death indian

o+x tap/corova
o+x press/super corova
o+x hold/extened super corova

o+triangle tap/cliff hanger
o+triangle press/cliff hanger lookback
o+triangle hold/extened cliff hanger lookback

triangle+o tap/shao-lin
triangle+o press/shao-lin roadio
triangle+o hold/extened shao-lin roadio

triangle+square tap/stailfish
triangle+square press/saran wrap
triangle+square hold/twitch

square+x tap/catwalk
square+x press/1 handed catwalk
square+x hold/no handed catwalk

square+o tap/can can
square+o press/disco can
square+o hold/extened disco can

square+triangle tap/super can
square+triangle press/super switchblade
square+triangle hold/1handed super switchblade

x+x+triangle tap/mulisha indian to heilcopter
tap
triangle+triangle+x bar hop to superman indian

triangle+triangle+o tap/experimental propellar

squ+squ+tri tap/cat nac to stailfish

squ+squ+squ tap/cat nac to 9 o' nac

squ+tri+o tap/super can to shao-lin roadio

o+x+square tap/cordova to 9 o' nac

triangle+o+o tap/mcmetz
triangle+o+o press/extened mcmetz

tri+squ+squ tap/saran wrap tonac nac lookback

o+triangle+triangle tap/seat stand
o+triangle+triangle press/surfer
o+triangle+triangle hold/surfer lookback

square+o+o tap/pendulun
square+o+o press/super pendulun

Better Tricks:
Play Freestyle and only do one trick. (superfly)Don't fall. then wait for the rest of the time. Then you enter at the replay screen enter x r2 square then hold r1 and L1. Then as soon as you let go you can do more/better tricks.

Experimental Tricks:
Experimental Break: (Hold L2 or R2) press Triangle, X, Triangle when in the air

Experimental Olympic Podem: (Hold L2 or R2) press X, Square, Triangle when in the air

Experimental Back: (Hold L2 or R2) press X, Triangle, X when in the air

Get Sal The Alien:
In Fox Creek, follow the white barrels from rooftop to rooftop and then you should land on a rock that's like a bridge but don't stop, you need to carry your speed and then you'll make it to a cave and just follow the weird alien stuff till u get to a room with an alien ship and go to the room in the back with the alien in a tube and then it should say special trophy awarded or something like that and now you have Sal The Alien!

Other Things to Get By Finishing Challenges:
Finish This To Get this:
Dramatic Entrance Challenge New Barriers
Brave Vertical Drop Challenge Cow Motorcycle
Impossible Wheelie Challenge New Ramps
Impossible Stoppage Challenge New Movable Objects
World's Longest Jump Challenge Unlock Cameron Steele
Dominate 250cc Pro Freestyle Season Fire Motorcycle
Cross Training Challenge Floating platforms & Station Z Arena
Lift Tower Challenge Unlock Elrod the Viking
Crane's Eye View Challenge Unlock Superfly
Mega Stunt Challenge Unlock Wheelball Mini-game
Safety First Challenge Balloon Toss Mini-game