Fledermausmensch kibitzer

Investigator Wolf Roder complains in reference to the search for the one, true Fledermausmensch:

You wrote that "The word ‘batman’ translates into German as ‘Fledermausmensch.’"

Batman surely is, and always has been, a man (male of the human species). Thus "batman" would translate as "Fledermausmann"  (with two n, please). Now that you have batman translated, how about "batty" asuming this means bat-like? Fledermausisch?