Use cheat engine.
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There is a list of the various codes you can use on Chewy Central.
you can't add cheats on plant vs zombies but you can type on the screen the normal cheats like daisies,future etc.
TrickeDout Pinata Daisies Sunny Days Tohot Future Mustache
plants vs zombies
Plants vs. Zombies happened in 2009.
9999 plants vs zombies
Use the frozen pea plant
Plants vs Zombies created their own fonts in the game. Their font was commonly called as PvZ font or Plants vs Zombies font. There are no other names for that.
you can download plants vs zombies at gamehouse
If you have Windows 7 you have Plants vs. Zombies for Free
plants vs zombies ps3 oao