These artificial monsters were originally created by a mayor gone mad to keep the people of his town locked in their homes. Any who dared enter the streets without special clearance-badge would be instantly mobbed by the croaking, waddling Mumblegoggers and enveloped in a thick cloud of lethal bacteria from their exhaust-hats. To this day, dozens of the original creatures hide in the alleyways of their long-dead town, still loyal to the mayor that they themselves eventually killed.

The inhalation of a Mumblegogger before spewing disease sounds comically like a train-whistle.