If you get a Hit and Run, then all you have to do is go to the Simpsons house and then when you go back out side, they will be gone. If your not on that level, then just go to any building that will let you in.
Christmas Look
To get a christmas look go to the calender and set it to christmas then when you go back to the main menu it will be all christmas, (homer is dressed as father christmas, sleeping on the sofa as usual!)
Cookies
If you need to make a quick turn and dont have enough time to do a real one, then just hold the 'B' button and the 'A' button and spin the analog stick in the desired direction.
Cookies
Hold down the 'b' button and hit the 'a' at the same time and you can spin a cookie, good for corners.
Different Camera
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press B, B, B, A to activate the cheat. A horn will confirm entry.
Easter Egg: Holiday Look
Change your system's internal clock (or play on a holiday) to the dates for Thanksgiving, Halloween and Christmas to experience a different game look.
Faster Cars
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press X, X, X, X to activate the cheat. A horn will confirm entry.
Faster Money Collection
Whenever possible, drive through crates and phone booths rather than kicking them, as you won't have to waste time running around and picking up your loot.
Grid View
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press B, A, B, Y to activate the cheat. A horn will confirm entry.
Mini events
The more mini events you do the more money you get and better cars. Make sure to alwasy do those, they can help you win.
Much Faster Cars
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press Y, Y, Y, Y to activate the cheat. A horn will confirm entry.
One-Hit Wrecks
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press Y, Y, X, X to activate the cheat. A horn will confirm entry.
Pressing Horn Button Jumps
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press X, X, X, Y to activate the cheat. A horn will confirm entry.
Speedometer
At main menu in the living room go to options. Hold L+R and press x,x,x,y you will hear a horn if confirm.
Trippy View
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press Y, B, Y, B to activate the cheat. A horn will confirm entry.
Unlimited Time in Timed Missions
When you start most timed missions in the game, you will be told to get into your car, then the clock will start. Instead, don't get in your car, but run to the area you need to go, then find a phonebooth or borrow a car. When you get in it, you are pretty much finished, and you are already at the goal with seconds(or minutes) to spare.
Unlock Brick Car
At main menu go to options hold L+R and press a, x, x, y.
Unlock Itchy and Scratchy Cartoon
Get all cards in every level to get the episode made for the game.
View Credits
At the main menu (the livingroom), go to the options screen. Hold down L+R, then press A, X, X, Y to activate the cheat. A horn will confirm entry.
Wrecked cars
After your car has exploded, you can still get in it and drive it. You are able to get the wrench and repair it, and drive it like normal again.