There are four types of Wheelies, all of which share human-like legs and a wheel-shaped head:
The first is red with facial features that most resembles a face out of the four. It starts out in the north-western corner of the map.
The second is blue-green with some sort of design involving a ring connecting three diamond shapes and surrounding a fourth. It spawns in the north-eastern corner of the map
The third is dark pinkish with a single eye. Many instances of this type flood the Stabbing Room.
The fourth is lime green with two red pupiled, misshapen eyes placed diagonally from each other, and a splotch of some kind that may be a nose. It guards the door to the Stabbing Room.