Here are too enemies of the Batman.

              Edward Nashton, known publicly as the Riddler, is a former forensic accountant turned serial killer, terrorist, and hacker who seeks to entrap Gotham's elite and to publicly unmask the city’s darkest truths with a series of puzzles and tortuous devices. His vendetta against Gotham put himself in conflict with Bruce Wayne, because of his ties to the Wayne Family.

       The Joker is a deranged serial killer and a dangerous enemy of the Batman, having been apprehended by him sometime during his first active year. He became an inmate at the Arkham State Hospital and was later visited by the Caped Crusader, as he attempted to profile the motives of the infamous serial killer, Riddler, whom Joker later befriended.

        Oswald "Oz" Cobblepot, also known reluctantly as the Penguin, is the ruthless lieutenant of the Falcone Crime Syndicate who seeks to rise up in Gotham's criminal underworld as its newest crime boss. As Penguin was being investigated into a possible connection with the murders being committed by Riddler, he became a target of Batman and Jim Gordon, despite being innocent of these crimes. Eventually, Penguin had discovered that it was Carmine Falcone who was being targeted by Riddler, as Falcone had also been identified as the rat who betrayed Salvatore Maroni, moments before Falcone was shot and killed by Riddler. In the wake of Falcone's death, Penguin had then prepared to step up, as Gotham's new crime lord.

        Bane is an escaped convict from an island prison in South America and a super-villain/assassin. Bane has abnormal physical strength as a result of having undergone experiments involving a derivative of the drug Venom. He became known as "The Man Who Broke the Bat" when he broke Batman's back, forcing Bruce Wayne to give up the Batman persona while he recuperated. Bane was originally created by writers Chuck Dixon and Doug Moench and artist, Graham Nolan, from a concept by Denny O'Neil. He first appeared in Batman: Vengeance of Bane #1 (January 1993).

        Dr. Jonathan Crane, also known as the Scarecrow, is a Gotham City supervillain and a major enemy of Batman. Created by Batman creators Bill Finger and Bob Kane, he first appeared in World's Finest Comics #3 (Fall 1941). His scarecrow costume, lanky appearance and surname were inspired by Ichabod Crane of the horror fable "The Legend of Sleepy Hollow".

The Scarecrow is an overly-obsessive and deranged ex-professor of psychology who uses a variety of drugs and psychological tactics to use the fears and phobias of his adversaries. He does not commit his crimes for wealth, but rather as a form of "research" to further study the effects of fear on humans (later, he does it to satisfy his own psychopathic desires), making Gothamites his unwilling guinea pigs.