Pinata,Dance,Trickedout,Sukhbir,Mustache And Future
zombies eat brains
enter kill all zombies should give you unlimited lawnmowers
get gamecih
plants vs zombies
all you have to do is unlock all the puzzle mode levels in plants vs zombies
9999 plants vs zombies
Plants vs. Zombies happened in 2009.
There is a list of the various codes you can use on Chewy Central.
There is a "trainer" out there, but can cause the game to be come very unstable, or you can use some build in codes that work in all versions of the game. I placed a link to those codes in the related links section below.
you can download plants vs zombies at gamehouse
Just type the code on any play screen.
If you have Windows 7 you have Plants vs. Zombies for Free