Batman faces a variety of foes ranging from common criminals to outlandish supervillains. Many of them mirror aspects of the Batman's character and development, often having tragic origin stories that lead them to a life of crime. These foes are commonly referred to as Batman's rogues gallery. Batman's "most implacable foe" is the Joker, a homicidal maniac with a clown-like appearance. The Joker is considered by critics to be his perfect adversary, since he is the antithesis of Batman in personality and appearance; the Joker has a maniacal demeanor with a colorful appearance, while Batman has a serious and resolute demeanor with a dark appearance. As a "personification of the irrational", the Joker represents "everything Batman [opposes]". Other long time recurring foes that are part of Batman's rogues gallery include Catwoman (a cat burglar antiheroine who is an occasional ally and romantic interest), the Penguin, Ra's al Ghul, Two-Face, the Riddler, the Scarecrow, Mr. Freeze, Poison Ivy, Harley Quinn, Bane, Clayface, and Killer Croc among others. Many of Batman's adversaries are often psychiatric patients at Arkham Asylum.
Sasha Bordeaux: Assigned as Bruce Wayne's bodyguard, Sasha deduced that Bruce was Batman and briefly fought at his side. She was framed for the murder of Bruce's girlfriend Vesper Fairchild and later joined Maxwell Lord's Checkmate organization. In The OMAC Project, Bordeaux was turned into a cyborg OMAC, but this incident was later resolved. While Sasha and Batman kissed near the end of The OMAC Project, their relationship seemed to have passed on.
Batman makes his way through the asylum, overcoming Mr. Freeze, Scarecrow and Clayface. He finds Joker with Two-Face, Riddler, and Penguin, but before he can stop them, Joker shows him a video of Robin, Red Hood, Nightwing, Batgirl and Red Robin being captured. Joker orders Batman to take his place on his throne, an electric chair, to spare their lives, and Batman does so, receiving an electric shock
Many of the major Batman storylines since the 1990s have been inter-title crossovers that run for a number of issues. In 1993, DC published "Knightfall". During the storyline's first phase, the new villain Bane paralyzes Batman, leading Wayne to ask Azrael to take on the role. After the end of "Knightfall", the storylines split in two directions, following both the Azrael-Batman's adventures, and Bruce Wayne's quest to become Batman once more. The story arcs realign in "KnightsEnd", as Azrael becomes increasingly violent and is defeated by a healed Bruce Wayne. Wayne hands the Batman mantle to Dick Grayson (then Nightwing) for an interim period, while Wayne trains for a return to the role.
Batman utilizes a vast arsenal of specialized, high-tech vehicles and gadgets in his war against crime, the designs of which usually share a bat motif. Batman historian Les Daniels credits Gardner Fox with creating the concept of Batman's arsenal with the introduction of the utility belt in Detective Comics #29 (July 1939) and the first bat-themed weapons the batarang and the "Batgyro" in Detective Comics #31 and #32 (Sept., Oct. 1939).
In those days it was like, one artist and he had his name over it [the comic strip] — the policy of DC in the comic books was, if you can't write it, obtain other writers, but their names would never appear on the comic book in the finished version. So Bill never asked me for it [the byline] and I never volunteered — I guess my ego at that time. And I felt badly, really, when he [Finger] died.