Surprise attacks

Surprise Attacks refer to Zombies suddenly appear in every stages except for Day. The Surprise Attacks zombies can be called as Ambush Zombies and usually comes in 2 or 3, with the exception of Night levels, as usually there are more than 3 graves. The Ambush Zombies can be normal Zombies, Conehead Zombies or Buckethead Zombies.

Strategy

 * For Night Ambush zombies, just use Grave Busters to destroy the graves.
 * For Pool and Fog Ambush zombies, when playing to the final wave, wake up/use an Ice-shroom right after the wave comes but before the Amush Zombies pop up.
 * For Roof Ambush zombies, they are dropped by Bungee Zombies and can be stopped by planting Umbrella Leaves.

Trivia

 * Ambush zombies in Pool and Fog levels have seaweeds on them.
 * Ambush zombies claim three Minigames: Grave Danger (which is a hidden Mini-Game), Whack a Zombie and Bungee Blitz (also a hidden Mini-Game).