$10,000:
During game play hit shift+4 ($) for $10,000.
Warning: Using this cheat will cause your marine tank water to become dirty!
Hidden Mermaid:
To unlock the hidden mermaid, place the mermaid statue in one of your marine tanks.
Hidden Unicorn:
This code from Zoo Tycoon still works with the expansion pack. Just rename one of your exhibits Xanadu and you will unlock a unicorn in the animal panel. You must rename the exhibit. If you try to name a new exhibit Xanadu, your game will probably crash.
Make Children Guests Upset:
Name a male guest Boogyman and the guest causes children to run away screaming .
Make Female Guests Upset:
Name a male guest rpro and female guests will run from him.
Unlock Triceratops:
Rename one of your exhibits Cretaceous Corral. Doing this though might crash your game.
Unlock the Deinosuchuse:
Rename an exhibit ''Super Croc'' to unlock the Deinosuchuse or beat the Breeding the T-Rex'' senario.
Unlock the Photo Booth:
After winning the Shark World scenario, you'll unlock the photo booth.
Unlock Ultimate Zookeeper:
Select a male zookeeper and rename him Jonathan Gilmour. This will automatically donate $20,000 to your zoo and increase zookeeper skills.
Unlock Yellow Brick Road:
To unlock the Yellow Brick Road, place a Bengal Tiger, a Black Bear, and a Lion into the same exhibit.