Type these cheat codes at any time during your play session to activate them:
pinata- dead zombies leave a shower of candy
trickedout- different lawn mowers
future- zombies wear futuristic sunglasses
dance- all zombies dance
sukhbir- changes zombie “brains” call
daisies- daisies are left behind when zombies die
Moustache- zombies have mustaches
Article from Gamersyndrome.com
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I am 19 years old and game, a lot. I have a DS, PS3, Xbox 360(with a broken disc drive) and PSP. I just started a blog since they say Aspiring video game journalists should have one it is:
http://gamefuorus.blogspot.com/ 
Nice cheat code.. nothing like a zombie spewing out candy.