The Flag Zombie is a zombie that announces a large wave of zombies. He is shown on the level progress bar as a red flag with a brain picture on it. They have the same health as a regular zombie, but move slightly faster. They appear on land. It is the second zombie the player encounters in Plants vs. Zombies and Plants vs. Zombies 2: It's About Time and is also the second zombie in the Suburban Almanac.
A spelling impaired zombie named "Brian," Flag Zombie keeps thinking the rest of the zombies are talking to him. At least he feels important.