12. Bat-Baby
Batman's early adventures saw mysterious rays of light transform him into pretty much anything and everything, but being turned into a baby with the mind of an adult is probably the most laughable. When Gotham's criminal element heard about this, he obviously became something of a joke, but would strike back by donning a new costume - a baby's outfit essentially - and taking them on as Bat-Baby. Bizarrely, those same criminals are terrified by Bat-Baby and unable to stop the Caped Crusader even as a normal toddler.