Zoo Tycoon DS Codes -

Cheat mode:
Press (x2), (x2), , , , , (x2), (x2), , , , at the main menu. The sound of an elephant will confirm correct code entry. When you start another game all animals, foliage, buildings, and other objects will be unlocked.

All animal shelters unlocked:
Change a guest's name to John Wheeler or Adam Levesque.

All animal houses:
Change a guest's name to Andrew Binder.

All animal toys:
Change a guest's name to Lou Catanzaro.

All foliage:
Change a guest's name to Charlie Peterson.

All scenarios completed:
Change a guest's name to Akiyama.

Animals breed more frequently:
Change a guest's name to Dr Dolittle.

Money is donated to zoo:
Change a guest's name to Bill Gates.

Blue shirts:
Change a guest's name to Mr. Blue.

Brown shirts:
Change a guest's name to Mr. Brown.

Orange shirts:
Change a guest's name to Mr. Orange.

Pink shirts:
Change a guest's name to Mr. Pink.

White shirts:
Change a guest's name to Mr. White.

Yellow shirts:
Change a guest's name to Mr. Blonde.

Money donated:
Change a guest's name to Bill Gates.

Sick guests:
Change a guest's name to Zeta Psi.

Endangered animals:
Change a guest's name to Steve Serafino.