You paid money to unlock another OG plant, this plant can chomp and eat zombies in one bite, being effective against zombies with tough armor and health, but he can't eat machines or Gargantuars, either way a good plant to deal with those zombies that have a lot of health, and he is a very hungry plant, he's the Chomper!

Chomper notices you as he acts like a dog, ready to eat some meat, no matter if it's raw, cooked, flesh or rotten flesh, he is just hungry