7. Mr Freeze
A mad criminal scientist, Mr Freeze has a vendetta against Batman for accidentally pouring a strange chemical solution over him during an arrest, causing him to develop a bizarre condition where he must stay in freezing temperatures to live. Its thanks to this series version of Mr Freeze that he is such a prominent enemy of Batmans as originally he was a low-key villain in the comics, once called Mr Zero, who the 60s show brought to a wider audience. Also, unlike Arnies endless ice/cold/freeze puns, this Mr Freezes catchphrase was, oddly enough, wild! Over to you, reader, to figure out why