The Words Batman Baddies separated by a stylized batman logo

Remember these Batman Baddies?

Here are six famous "baddies" that have given Batman headaches over the years...

Batman Villains
CHARACTER FIRST APPEARED DETAILS
Black Mask Batman #386 (August 1985) Roman Sionis is a corrupt businessman and crime lord who has a fixation with masks. He wears a black skull-like mask that gives him limited mind control abilities.
Catwoman Batman #1 (Spring 1940) Selina Kyle is an accomplished jewel thief. Although traditionally considered a villain, she is often portrayed as an antihero and is occasionally romantically involved with Batman.
Hugo Strange Detective Comics #36 (February 1940) Hugo Strange is an insane psychologist who uses his mastery of chemistry to create a serum that turns his victims into mindless monsters who obey his every command. He has succeeded in deducing that Batman is Bruce Wayne.
Joker Batman #1 (Spring 1940) The Joker (real name unknown) is a homicidal maniac with a clown-like appearance, bent on creating havoc in Gotham City and fighting a never-ending battle against Batman. His arsenal of weapons includes razor-sharp edged playing cards, acid-squirting trick flowers, joy buzzers with a lethal electrical charge and a fatal toxin called Joker venom. He is Batman's archenemy, as well as the most famous and recurring Batman villain.
Killer Croc Batman #357 (March 1983) Waylon Jones has a medical condition that warped his body into a massive crocodile-like form. As Killer Croc descended into madness, he sharpened his teeth to razor points and began murdering innocent victims. He possesses super-strength and is immune to toxins.
Riddler Detective Comics #140 (October 1948) Edward Nashton, a.k.a. Edward Nygma (or "E. Nygma"), is a criminal mastermind who has a compulsion to challenge Batman by leaving clues to his crimes in the form of riddles, puzzles, and word games. Nygma's intelligence rivals that of Batman. Nygma often carries a question mark-tipped cane around with him, as well as many other trick puzzle gimmicks. Penguin is one of his partnerships.