Buy a female zebra and a male peafowl put them in a tundra terran and keep them in there for a while with a polar bear and 9 male penguins. After a while the zebra should give birth to a unicorn and pegasus.

For the following cheats, give a guest given name:

Ghost animals=jozzthegr8
Make guests angels and/or devils=tasmanian
Unicorns=trinaty
Buy baby animals=celine
Turn guests into animals=trapped earl

For extra money hold down the shift key while holding the number four.(It might work in other zoo tycoon games.) But you only get about $25 every 5 seconds.

When you start a new game as the first person walks in the zoo and change his name into Dinoman then go to the animal selection and there will be dinosaurs. (it may work in other zoo tycoon games to.)