Pretorius is a madman who had his own head removed from his body and placed on tiny, spider-like robotic legs, which could attach to a larger android body. His plans always revolved around either obtaining or controlling the Mask of Loki (Pretorius is one of the few characters in the series aware of The Mask's true identity), or as part of some increasingly insane "science experiments" which if carried out would result in the death of thousands or even the end of mankind. He mostly pronounces Stanley Ipkiss' last name as "Ipp-kiss".