Leon was pieced together from a bat and a lion that were stolen from a zoo. The wings are from a bat that were stretched to cover the lion's back. The lion was given a human brain that was dug up in a cemetery. The human brain gave Leon anthropomorphic characteristics.
Leon lives alone in a cave on an island in the middle of the Pacific Ocean.
Because Leon possessed a human brain, he was taught to speak Latin and to wear bow ties.
Leon was also taught how to fly!
Leon was taught to be good and not to cause trouble. If Leon was good, he would get a new red bow tie.