you can't add cheats on plant vs zombies but you can type on the screen the normal cheats like daisies,future etc.
Use cheat engine.
There is a list of the various codes you can use on Chewy Central.
TrickeDout Pinata Daisies Sunny Days Tohot Future Mustache
plants vs zombies
Plants vs. Zombies happened in 2009.
9999 plants vs zombies
you can download plants vs zombies at gamehouse
plants vs zombies ps3 oao
If you have Windows 7 you have Plants vs. Zombies for Free
plants vs zombies definetly
Plants vs. Zombies was first released for PC and Mac on May 5, 2009