Dr. Zyme was an absent minded biochemist who worked for the MegaKat Biochemical Labs. Zyme's intentions were to create chemicals that would benefit others like when he created the Viper Mutagen 368. Unfortunately, Viper Mutagen 368 proved to be worthless after Dr. Elrod Purvis, who died while attempting to steal the formula, was revived as the crazed lizard known as Dr. Viper. Zyme might have died in "In The Giant Bacteria", while trying to combat Morbulus with antibiotics. In the Kooshmeister's drawing, Dr. Zyme returned to seek revenge of Dr. Viper after being horribly damaged by the bacteria and now resembled the Batman character Two-Face.