Invinciblity:
Y,A,Y,A

All bonus cars:
A,B,A,B

Fast cars:
X,X,X,X

Very fast cars:
Y,Y,Y,Y

Red brick car:
B,B,Y,X

Super jumps:
X,X,X,Y

Instant viechle explotions:
Y,Y,X,X

Display speedometer:
Y,Y,B,X

Grid view:
B,A,B,Y

Invincibilty:
Y,A,Y,A

All bonus cars:
A.B,A,B

Infinate car health Y,A,Y,A
Grid Mode B,A,B,Y
Faster Car X,X,X,X
Fastest Car Y,Y,Y,Y
Speedomitor Y,Y,B,X
Horn that makes you do a huge leap X,X,X,Y
Cars blow up Y,Y,X,X
Credits A,X,X,Y
More camera angles B,B,B,A
All reward cars A,B,A,B
Brick car B,B,Y,X
Tripping mode Y,B,Y,B
Night time mode A,A,A,A

When the screen pops up at the beginging hold both triggers and press A A A A X A B B B Y B A X.

Then when thhe cheat menu pops up type in:

Cheesebag: you get to throw bags of cheese

Jolt: makes you move faster