to go to the secret level go inside the kwiki-mart to the frozen man and press ax2 bx2
then black, white and you should hear a horn sound

Go to Moes And Press SQUARE then hold down L3 then type in R2,L2,X,O,O,O,L1, R2 And Moe
runs out and gets in your car.... YOU MUST BE HOMER OR BART TO USE THIS CHEAT...

lvl 1:near mr burns manshion out side the golden house

lvl 2:on top of the broken monarail

lvl 3:in a crate on the big boat near the lighthouse

lvl 4:near the back of the caravans near the power plant

lvl 5:near the fountin where you do the last misson

lvl 6:near planet cype in a hole on the side of the bilding

lvl 7:near the accindent near the kick ki market

to get into  "Nowhere Land" on level 1, you must go on the bridge inbetween the Krusty
Burger and Cletus's house. Enable the "jumping cars" cheat then jump into the water. If it
sends you back to land go on the other side and give it a try. Once you've done this it
should lead you into a place outside animation and let you drive around. If you want to go
back, go on "pause" then on "mission select" then just click on any mission to go back.
ITS SWEEEET!

Go to the options screen, hold L+R and press YYXX If you entered it right you will here a
horn. 


             BAILEY 

at da beginin of da game go to flanders backyard and there is alot of money

When you see a buzz cola box stand on it and press aab and it will open in just 1 hit

press lr and a c d p

First thing u want to do is get a car. Then u go on Barts level or Apus level then do
super jump cheat.Then go on the detour. And keep jumping until u find a invisible
roof,then jump on it with the car                                            then your car
will be on air then get out of it then your walking on air

I have gotten 3000 coins from this, no joke.

ok, first you need to enable the Invincible and Explosion codes
(hold l+r YYXX and hold l+r YAYA)

next you get a hit and run and once you get it hit all the police cars and every other car
you see. 

just make sure you dont get busted and you have both codes and you will succeed. your
welcome.

use invincibility and the one-hit explosions. when you get a hit-nd-run, just keep
driving. the cops cant catch a moving vehicle, so they ram it. they ram you with these
cheats on, they blow up. a blown up car cant give you a fine. so this gets you off the
hook while causing even more mayhem. yay mayhem!

PLEASE NOTE:You Must Enter These Cheats On The Option Menu Whilst Holding L+R.
  
YYXX= Cars Explode In One Hit

XXXX= Fast Cars

YYYY= Super Fast Cars

BABA= Alternative Camera Angles

XXXY= Car Jumps High(Press Horn) 

YYBX= Show Speedometer

YAYA= Your Car Is Invincible

ABAB= Unlock All Cars For New Game. MUST Be Typed In With Complete Save Loaded.

AAAA= Night Mode

BBYX= All Secret Cars Replaced By Red Box Racer

AXXY= Different Audio During Credits

YBBB= Wanted Bar Goes Down(Enter While Out Of Car)

XXBBA= Game Finish Automatically

AAABBB= Unlock All Levels