Supercar Street Challenge cheats and cheat codes for Playstation 2

Master code:
Press Square, Square, Up, Right, Down, Left, L2, R2, L1, R1 in the main menu.

Fast car:
Go to the car selection screen after quickly press 
Circle, Square, L1, R2, Right, Left, Up 

Furasshu, sama car: 
Go to the cat selection screen and quickly press 
Up, Up, Down, Down, Left, Right, Left, Right, Square, X 
or
Quickly press Up, Up, Down, Down, Left, Right, Left, Right, 
X, Circle, Select, Start. 

Change car colors:
Go to the car customization screen, then highlight the "Change Color" option.
After, press Up, Right, Down, Left, Triangle, Circle, X, Square. 

Perfect car
Finish all classes in all championship categories. After, make a car 
and enter "Fusshusama" as a name. Type "Bye Seya" as a team name.  

Unlock C12
Win a championship race with a class C drift car (i.e., Pickster)