For the past couple of years, the word "change" has been thrown around ad nauseum, but as many understand (or are just now beginning to understand), not all change is good. Nowhere has that principal been better understood than within the comic book superhero community, as shocking physical transformations have afflicted their ranks for decades.
A frequent target of these freakish mutations was none other than The Batman. Originally a dark and moody character, the science fiction craze of the late 1950's and early 60's pushed Batman to jaw-dropping levels of lighthearted sci-fi insanity....such as the bizarre transformation that occurred in Batman #140 (1961).
Mistakenly transported to the alien planet Xlur, Batman and Robin where transformed by its strange atmosphere into green, bug-like aliens with magnetic antennas!
When they returned to Earth, Batman and Robin's strange new appearance was feared and distrusted by their crime-fighting colleagues and the people of Gotham. After they apprehended The Yellow Sweater Gang (yes, you read that correctly), the alien-mutation wore off...allowing Batman and Robin to return to their (relatively) normal appearances.