Brain

The Brain is the center of the nervous system of the body and directs all the body's actions. It is also the favourite food of Zombies.

In Plants vs. Zombies, the zombies eat brains, which is why the player's house is being invaded. They also appear in the Mini-game Zombiquarium, where they are used to feed Snorkel Zombies so they don't die, the I, Zombie Puzzle Mode levels where the player plants zombies who must eat the brains at the end of every lane, and as the Zombie equivalent of Sun in Versus Mode. A brain is also featured in the song Zombies on Your Lawn, and is used as a pointer for the lyrics.

In parts of the game, some Zombies can be seen showing brains on pieces of their clothing or equipment. For example, the Zombie Bobsled Team has a brain picture on the front of the bobsled and the words "Brains or Bust" written on the side, the Dolphin Rider Zombie speedo-type outfit has a picture of a brain on it, the Snorkel Zombie has a shirt with the legend "I love Brains," and the Flag Zombie carries a red flag with a picture of a brain on it. Also, in the Zombatar, it has a black T-Shirt that says "I ♥ (picture of a brain)"

thumb|300px|right|NOOOOOOOO!!!

Additionally, a game over message in green slime saying "THE ZOMBIES ATE YOUR BRAINS!" will appear along with a loud "NOOOOOOOOOOOOO!" if the Zombies get inside the player's house.

Versus Mode
The Brains were given a vital role in the Xbox Live Arcade version as the Zombie's equivalent of Sun. They are used to create zombies to attack the opponent's lawn and try to eat their brains. Much like Sun, brains will fall from the sky anywhere in the three lanes controlled by the player who is playing as Zombies, and will be produced from Zombie Gravestones at the same rate that Sunflowers produce Sun.

Brain Costs
(* means in XBLA and newer versions only)

Trivia

 * In Bolt Creative's Pocket God, the Zombie Pygmies crave a similar looking brain.
 * In the credits "Zombies on Your Lawn" music video, it says brains are rich in cholesterol, which is actually true.
 * Dr. Zomboss already has his own brain, though the zombies don't seem to get attracted to it.
 * The in-game brain looks like a puff of pink smoke.
 * The Zombies says "brains" because he's hungry.