Everything free
left, down, x, o
You must do this 8 times in a row

Get all research done
up, down, up, down, left, up, down, up, down, right
You must do this 8 times in a row.

Clean Park
When park is full, save and reload the game and all trash will be picked up.

Easy Money
These best way to use this glitch is to go to a puzzle sideshow that has a low play cost. While somebody is playing, up the play cost to $10,000. Make sure that you hit the confirm check to get that price activated. When they finish the puzzle you will get the $10,000 instead of the lower play cost they started playing at. Nobody will play it at $10,000, so lower the price back Down to a fair price. You can do this as often as needed. Puzzle sideshow works best because it gives you time to raise the price while the customer is playing.

Quick Gold
Build a side show that you can play on, go to the sideshow info, set the chance of winning to maximum and then play the sideshow and win. You can only get one ticket a side show, and you have to have the camcorder. You can't do this on the easy one.

No Money taken from the Bank
While in the park press [LEFT, DOWN, X, CIRCLE] eight times. If this has been entered correctly you will hear a sound

Make Cash
A good tip is to put the french fry stand and a soda stand right next to each other. Boost up the salt all the way so the little people get a dry mouth then write next to the french fry stand put a cola stand and put the price to about 200 then they will buy the drinks like mad cause they are so thirsty. DON'T raise the price to high or else they won't buy.

Under the Carts
Build a dino cart ride, when you are done connecting each side press x to build a path and put it right on the track and that part will turn into a bridge instead of putting a addon and the dino carts will not get in the way.