Zombies are characters who have been killed and then revived or reincarnated in some way or form. The traditional green zombie has only been seen in Mafia Madness.
Half of the enemies in the episode became zombies as the twelve mafia men were randomly revived and killed again ironically afterwards. They had the same appearance as early zombies from Madness Combat.
Faec Man appears in this episode in the form of a dark skinned zombie, as he shuffles in at a high speed screaming, "OMFG, FAECED ZOMBIE IS PISSED" only to be killed by Kage's MP5. His skin became a darker grey colour.