MX Unleashed for PS2 Cheats and Cheat Codes

50cc Bike
Enter squirreldog at the cheat screen to unlock the 50cc bike.

Pro Physics Cheat
Go to options -> cheats and put in code SWAPPIN

Unlock 500cc Bikes
X, X, X, X, Square, L1, L1, R1, R2, R2.

Dune Buggy
Type in sandman under options.

All Machines
To get all machines, type MINIGAMES in the cheat entry under options.

All Freestyle Tracks
Enter BUSTBIG in the cheat entry screen.

500cc Bikes
Enter BIGDOGS in the cheat entry screen.

All Supercross Tracks And All National Tracks
For Supercross, enter STUPERCROSS, and for Nationals, enter ECONATION in the cheat entry screen under "Options"

Unlock Everything!
Go to cheats clickable on the options menu and type in "clappedout".

Bowling Mini-game
Enter WRECKINGBALL as a code. Alternately, play the Ocotillo Wells track in freestyle mode. Get to the purple stunt competition marker then look for the nearby row of power lines. Follow the power-lines to the west to reach the bowling lane.

Unlock Everything
When you are at the main menu go to options and in cheatcodes type in "clappedout" no spaces needed.