If your driving in a car and you come at a stoplight point and if there is a car in front
of you and you hit the bumper of the car the car wont ever move and youll have to go
around. If you stay there waiting for the car to move people are going to start honking
their horns at you.

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.

In the fourth level as Marge, get in the quad bike and drive to the power plant. Then go
down the tunnel and use the fifty-foot jump cheat. You will then fly up through the air
and land back down in a different part of the tunnel, therefore, short-cut. (This would
be useful during missions.)

when you start the level go to the wreckage and get the rc car. then find the pumpkin
house turn right and there should be a alley turn right and find the first gate  back up 

y'know, u may think you can only enter cheats at the main menu. But u are WRONG. you can
do the cheats DURING a game too. so here's what you do. press start, and go to "options".
hold down L+R and enter your cheats. you won't hear a sound. However, when you resume the
game, your cheat works. Note: it may not work the first time, so keep trying. Give it a
go!

no police
hold triggers 
a,a,b,b,y,y,x,x,a,y then white button

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!

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!

first go to level 7 go to spook e mart (kwik e mart) then go on the roof 
pause the game go down to options then press L and R then xxyy bayy take it off of pause
and if you hold down b you should be able to fly