Extra gold tickets:
Press [Up, Down, Left, Right, Circle, Right, Left, Down, Up, Circle] four times, Start in the park. A sound will confirm correct code entry.

No money taken from bank:
Press [Left, Down, X, Circle] eight times, Start in the park. A sound will confirm correct code entry.

Get everything:
Press [Up, Down, Up, Down, Left, Up, Down, Up, Down, Right] eight times, Start in the park. A sound will confirm correct code entry.

Hint: Easy Gold Tickets:
When you get four gold tickets, buy the camcorder. Press R2 and walk up to one of your sideshows. Press Square to play it, and if you win you will get a gold ticket. (Note: Not all sideshows can be played.)

To get a Gold Ticket, you must play the main game. When building your park, put the rides or shops as close as possible. Then, train the staff up to level 5. Then, put rides on research, and so on.

To get a hidden golden ticket, place trash cans by all your food and drink shops. If you have enough features for the size of your park you will also get a Gold Ticket.

Hire at least two guards and train them to level 5. Put enough security cameras to cover the entire park and you should get a hidden Gold Ticket for having high security.

Get all the rides and build them. If you upgrade most of them you will get a Gold Ticket. Note: Try not to build your rides too far from the main part of your park.