Morbulus was one of the villains encountered by the SWAT Kats early in their career as vigilantes. He literally has eyes in the back of his head, giving him 360-degree vision and making him difficult to take by surprise. Morbulus (for reasons never revealed) attempted to destroy all the oil refineries in Megakat City, in a spree dubbed by the media as the “Refinery Reign of Terror.” He ended up being defeated by the SWAT Kats, who used a Cookie-Cutter Missile to “cut” the pilot from the cockpit of his fighter jet, seat and all. Grabbing him with the Sky Claw as he fell, they dumped Morbulus into the bay. However, by the time the Enforcersarrived, all they found of Morbulus was his empty clothes.
In his underwear, Morbulus climbed into a sewage drain pipe where he encountered Dr. Viper, who took the defeated villain back to his lab in Megakat Swamp. There, Morbulus offered to help the evil biochemist steal Katalyst 99; Viper let him “help” by turning him into a “living test tube” for his new bacteria strain, mutatinghim into a hulking purple bacteria blob.
Morbulus was voiced by Jim Cummings in his only appearance. According to Mark Lungo’s article on the series, Morbulus was originally going to be called “Occulus,” until it was discovered that there was already a Marvel villain with that name. As a result, his name was changed to Morbulus, although he is still identified as Occulus in the model sheets and storyboards for The Giant Bacteria.