Anti-Hero

When a character has Anti-Hero, that means it does additional damage in an empty lane. For example, Poison Mushroom has 1 Strength and Anti-Hero 2, so if there isn't a Zombie in its lane, it would do 3 damage instead of 1 because 1 + 2 = 3.

Plants

 * Poison Ivy
 * Poison Mushroom
 * Poison Oak

Zombies

 * Kitchen Sink Zombie
 * Mini-Ninja
 * Space Pirate
 * Stealthy Imp
 * Walrus Rider