Tweedledum and Tweedledee (comics)

Arkham Asylum is a fictional forensic psychiatric hospital appearing in American comic books published by DC Comics, commonly in stories featuring Batman. It first appeared in Batman #258, written by Dennis O'Neil with art by Irv Novick. Located in Gotham City, the asylum houses patients who are criminally insane, as well as select prisoners with unusual medical requirements that are beyond a conventional prison's ability to accommodate. Its high-profile patients are often members of Batman's rogues gallery.

James W. "Jim" Gordon Sr. is a character appearing in American comic books published by DC Comics, most commonly in association with the superhero Batman. Created by Bill Finger and Bob Kane as an ally of Batman, the character debuted in the first panel of Detective Comics #27, Batman's first appearance, making him the first Batman supporting character ever to be introduced.

Man-Bat is a fictional character appearing in American comic books published by DC Comics. Introduced in Detective Comics #400 as an enemy of the superhero Batman, the character belongs to the collective of adversaries that make up his rogues gallery. Originally portrayed as a supervillain, later incarnations show the Man-Bat as a sympathetic villain or antihero.

Clayface is an alias used by several supervillains appearing in American comic books published by DC Comics. Most incarnations of the character possess clay-like bodies and shapeshifting abilities, and all of them are adversaries of the superhero Batman. In 2009, Clayface was ranked as IGN's 73rd-greatest comic book villain of all time.

Hugo Strange is a supervillain appearing in comic books published by DC Comics, commonly as an adversary of the superhero Batman. The character is one of Batman's first recurring villains, and was also one of the first to discover his secret identity. The character first appeared in Detective Comics #36.

The Mad Hatter is a supervillain appearing in comic books published by DC Comics, commonly as an adversary of the superhero Batman. He is modeled after the Hatter from Lewis Carroll's novel Alice's Adventures in Wonderland, a character often called the "Mad Hatter" in adaptations of Carroll. A scientist who invents and uses technological mind control devices to influence and manipulate the minds of his victims, the Mad Hatter is one of Batman's most enduring enemies and belongs to the collective of adversaries that make up Batman's rogues gallery.

Killer Croc is a supervillain appearing in American comic books published by DC Comics. Created by Gerry Conway, Don Newton and Gene Colan, the character was introduced in Detective Comics #523. He has become one of the most enduring enemies of the superhero Batman and belongs to the collective of adversaries that make up his rogues gallery.

Gillian B. Loeb is a fictional character in the DC Universe who serves as an enemy to Batman's ally James "Jim" Gordon in DC Comics publications.

Firefly is a supervillain appearing in American comic books published by DC Comics. Created by France Herron and Dick Sprang, he made his debut in Detective Comics #184. Initially portrayed as a criminal who utilized lighting effects to commit robberies, Firefly was later reimagined as a sociopathic pyromaniac with an obsessive compulsion to start fires following Crisis on Infinite Earths' reboot of the DC Universe in the 1980s. This darker depiction of the character has since endured as one of the superhero Batman's most recurring enemies and belongs to the collective of adversaries that make up his central rogues gallery.

Maximilian "Maxie" Zeus is a supervillain appearing in American comic books published by DC Comics, primarily as a minor enemy of Batman. He is depicted as a mentally ill former history professor who is obsessed with Greek mythology and believes himself to be the god Zeus, becoming a crime lord in Gotham City.

The Ratcatcher is a character appearing in American comic books and other media published by DC Comics, primarily as an enemy of Batman. He belongs to the collective of adversaries that make up the Dark Knight's rogues gallery. Once an actual rat-catcher in Gotham City, Flannegan sank into a life of crime. Calling himself the Ratcatcher because of his special ability to communicate with and train rats, Flannegan has used his minions to plague Gotham on more than one occasion by unleashing hordes of the vermin.

The Riddler, a supervillain in DC Comics and an adversary of the superhero Batman, has been adapted into numerous forms of media, including feature films, television series, and video games. The character has been portrayed in live-action by Frank Gorshin and John Astin in the 1960s television series Batman, Jim Carrey in the 1995 film Batman Forever, Cory Michael Smith in the 2014 Fox series Gotham, and Paul Dano in the 2022 film The Batman. Actors who have voiced the Riddler include John Glover in the DC Animated Universe, Robert Englund in The Batman, and Wally Wingert in the Batman: Arkham video games.

The character Two-Face was created by Bob Kane and first appeared in Detective Comics #66. However, he did not appear outside comics until half a century later in Batman: The Animated Series. Two-Face has since been substantially adapted from the comics into various forms of media, such as feature films, television series and video games. Two-Face has been voiced by Richard Moll in the DC Animated Universe, Troy Baker in the Batman: Arkham series, Billy Dee Williams in The Lego Batman Movie, and William Shatner in Batman vs. Two-Face. His live-action portrayals include Billy Dee Williams in Batman (1989), Tommy Lee Jones in Batman Forever, Aaron Eckhart in The Dark Knight, Harry Lawtey in Joker: Folie à Deux, and Nicholas D'Agosto in the television series Gotham. In 2009, Two-Face was ranked #12 on IGN's list of the Top 100 Comic Book Villains of All Time.