This monster is probably based on the yōkaiNuppeppō, an undead amorphous being that wanders aimlessly, spreading its odor of rotten flesh.
This is reinforced by the "plague spreader" theme of this monster and by the fact it has not a defined form, being composed by parts of many different creatures.
While most of this monster's body features aren't identifiable parts of specific monsters, its right arm appears to be that of "Koalo-Koala" and its left arm appears to be that of "Berserk Gorilla".
From 2008 with the release of Crossroads of Chaos, to 2016 with the release of Breakers of Shadow, the three aformentioned monsters were the only Legal Zombie Synchro Monsters in the TCG, meaning that all Zombie Synchro Monsters required "Plaguespreader Zombie" as material during that period of time.