Unlimited Money:
Just press the $-button ! Press it again for more money ! BE SURE to be prepared to repair fences. This cheat causes fences to crumble and animals may escape!

No pain for unlimited money:
Press $ and shift and hold them and watch your money go up rapidly! But to make sure there's no pain in getting millions of money make sure you do it at the beginning of the game when you have no enclosures otherwise the fences will break and your animals will escape and then you'll have to buy new animals and new fences which will drain away your new money!!!!!

Money Cheat:
Enter in config.zip, in game directory.
Select economy.cfg and open it with the notepad.
find the line cash=50000, and change the value.

Various Cheats:
Ctrl-f will turn off the drawing of all foliage on the map. Hitting Ctrl-f again will turn it back on.
Name a guest "John Wheeler" to make all the animal shelters available to you
Name a guest "Hank Howie" to get all staff education programs
Mr. Blue - turns everyone's clothes blue.
Mr. Blonde - turns everyone's clothes yellow.
Mr. White - turns everyone's clothes white.
Mr. Brown - turns everyone's clothes brown.
Mr. Orange - turns everyone's clothes orange.
Mr. Pink - turns everyone's clothes pink.
Using these also turns the buildings roofs a matching color
Also, try these names..

Alfred H - Birds begin to appear and people freak out.
Russell C - Fences all fall apart.
Zeta Psi - Some people's shirts turn yellow, and then their faces turn green, and then they puke
Steve Serafino - All endangered Animals
Andrew Binder - All animal houses
Unlock the Triceratops
Name one of your exhibits "Cretaceous Corral". This will unlock the Triceratops. I should also note that if you name a brand new exhibit using this cheat, it will crash the game. Everyone who's done it with a new exhibit has experienced this, so keep it in mind.

Unlock the Unicorn:
Name one of your exhibits "Xanadu". This will unlock the Unicorn. I should also note that if you name a brand new exhibit using this cheat, it will crash the game. Everyone who's done it with a new exhibit has experienced this, so keep it in mind.

Easter Egg: Yellow Brick Road:
Place a Lion, a Tiger and a Bear in the same exhibit, and you will unlock the 'Yellow Brick Road' footpath. It's not cheap though, at $100!

Hex Cheats:
1. Open config.ztd with winzip.
2. Open Economy.cfg with notepad or wordpad.
3. Search for cZooDooRecyclingAmount and change the number to whatever you want. This will be the profit for every recycle you do. Normally you recycle around 8-12 times per month.
4. Also, look for cKeeperCost which should be 800. This is the salary you pay your zoo keepers. Change it to something lower and your expenses will decrease dramatically.
5. If you want more money at start of the game, edit zoo.ini with notepad or wordpad and find a line called MSMaxCash. Change that to whatever you want and you can start out with a couple of million.

Get All Scenarios Available:
Edit the file zoo located in the Zoo Tycoon Directory (Please backup this file first) with Notepad or a similar text editor to read as follows at the bottom of the file:

[scenario]
tutorial=0
ba=1
bb=1
bc=1
ca=1
cb=1
cc=1
cd=1
da=1
db=1
dc=1
dd=1
ea=1
eb=1

If you have other parameters leave them and just add anything new above.

Different Animals:
Use the following names to rename the animals indicated

(Hippo) Fat: Two hippos Sumo
(Bear) Deer: Bear gets Free from Exhibit
(Lion) Nan: Get a baby from a male lion
(Unicorn) Larry: get size of a Dinosaur
(Dinosaur) Unicorn: One Horn
(Dodo) Doflopnok: Unlock the White Dodo
(Panda) Blackly: Unlock and turn in to a Red Panda
(Bongo) Bad: Turn in an Okapi
(Okapi) Tall: Get tall as a Giraffe
(Yeti) Bigfoot: Unlock the Bigfoot
(Yeti) Bentley: Turn in to Spyro's friend, Bentley
(Reindeer) Rulpoln: Red light nose
(Reindeer) Dancer: Dances with a female Reindeer
(Croc) Agent 9: Always happy
(Monkey) Agent9: Turn in to Spyro's friend Agent9
(Ape: Chimpanzee or Gorilla) Borneo: Unlock the Orangutan
(Ape) Kangaroo: Unlock the Wallaby
(Gorilla) Mountain: Unlock the Mountain Gorilla
(Tiger) Nope: Unlock the Magnet the Polar bear
(Tiger) Dog: Unlock all Worker Dogs and Great Dane
(Kangaroo) Shelia: Turn in to Spyro's Friend Sheila the Kangaroo
(Penguin) Sgt.Byrd: Turn in to Spyro's frend Sgt.Byrd the flying Penguin
(Sgt. Byrd) Fly: Fly out of Your Exhibit and Your Zoo

More Giant Panda's:
In the last scenario, when you have to breed Giant Panda's, normally you can only choose two. If you recive the message that you can adopt the two panda's, just pause the game. Now you can adopt as many Giant Panda's if you want. REMEMBER! If you turn the game back on, you can't adopt Giant Panda's anymore, so adopt them all when the game is paused.

Animals Never Get Mad (Make a backup of file!):
First go to program files, open up microsoft games, while in there open up the zoo tycoon folder(if its in program files). Then in search open up the file called zoo.ini in note pad and erase everything on it, then save changes. Just start playing and you'll never have to make your animals happy again !

How to unlock the Yeti:
Name an Exhibit Kathmandu

Note:name an exhibit number 1 then rename the exhibit kathmandu other wise the game will crash!