Board Thread:Plants vs. Zombies/@comment-6280504-20140104183647

I am making my own mod, and after some serching in "LawnStrings I saw this:

"[DOG_WALKING_ZOMBIE]

Dog Walking Zombie

[DOG_ZOMBIE]

Dog Zombie

[PROPELLER_ZOMBIE]

Propeller Zombie" what are those zombies? can anybody tell me about that? 