Dr. Kirk Langstrom, a scientist specializing in the study of bats, develops an extract intended to give humans a bat's sonar sense and tests the formula on himself, it has a horrible side effect of transforming him into a hideous man-sized bat.
The serum also takes away his intelligence.
About this creation
Man-Bat is made of the head and legs from the "wolfman" minifigure. His chest is from the "minotaur" minifigure.