Simpson's: Hit & Run, The Cheats (Xbox)

- Infinite car health

- All reward Cars

To skip a mission,  you have to fail a mission 5 times and then
  in the menu you will have the option to "skip" sometimes you
  will have to fail a mission 6 times. It's common sense if you have
  played Road Rage, in the Missions fail it 5 times and you skip it,
  same as here! NOTE: THIS DOES NOT WORK ON THE LAST MISSIONS FOR ANY
  LEVEL

  

To Get The Bonus Game You Need To Get All Of The Collector Cards In At
  Least 1 Level. NOTE: This will let you play 1-3 player games and
  races.

  

- Faster cars

There are several ways to get cars first of all you will be required
  for each level to buy 1 that is the easiest.  You can buy them
  from Gill who will be marked with a $ sign on map.  One person
  somewhere on the map will have an ! over there head do a mission for
  them and u will get a car.  Also buy doing the 3 races presented
  in the levels you will get a car from Patty and Selma.

  

  - Credits

Drive all around and find the flying bee cameras. When you find one go
  to it jump and hit and a large amount of cash well come up.

  

- Night time mode

  

  

      Get in
      other people's cars

      If you want to do this first you have to get out of the car you're
      already in, then go up to a car that's driving in the street or
      get on top of it and wait till you see the y button icon at the
      top of the screen and press the y button there, now you're driving
      in someone else's car!

      
  

      Rocket car

      In the first level of this game you can find a rocket car. Find
      the power plant and take the tunnel all the way through. When you
      arrive out you will see large mansions. Go straight out, turn
      right, then left and immediately to your left will be a gold
      house. walk up to the front gate and you will see a rocket car
      from that old episode... you know that one. Get inside with y.
      Keep in mind that this car is extremely fast and not so durable so
      be careful!

      
  

      Money Hint
  

      Drive through Booths and crates
      instead of kicking them to get coins faster
  

Go to the Halloween level aka level 7.  Now walk out in to the
  middle of the street.  And wait till a car stops in front of you. 
  And when it says press (y) to enter. Don't do it.  Instead, press
  (a) and jump on the back of the car that stopped by you.  It
  works best with the ghost boat because, there is a lot of room on it. 
  Once your on the car, don't press anything.  And after a few
  seconds, the car you are on will begin to move and homer will act like
  hes surfing.  (The car will take you all over the level)

  

Go inside the school or the Kwik-e-mart and go up to the shirt (with
  the $ sign above it) and press the Y button then you can buy different
  cloths such as Homer in his under wear or in a dress.

  

- Speedometer display

- Red Brick Car