With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Joker was written by Bill Finger.
text_B: The Joker is a fictional supervillain created by Bill Finger , Bob Kane , and Jerry Robinson who first appeared in the debut issue of the comic book Batman -LRB- April 25 , 1940 -RRB- published by DC Comics .. DC Comics. DC Comics. Batman. Batman ( 1989 film ). Bill Finger. Bill Finger. Bob Kane. Bob Kane. Jerry Robinson. Jerry Robinson. supervillain. supervillain. comic book. American comic book. Credit for the Joker 's creation is disputed ; Kane and Robinson claimed responsibility for the Joker 's design , while acknowledging Finger 's writing contribution .. Although the Joker was planned to be killed off during his initial appearance , he was spared by editorial intervention , allowing the character to endure as the archenemy of the superhero Batman .. Batman. Batman ( 1989 film ). In his comic book appearances , the Joker is portrayed as a criminal mastermind .. comic book. American comic book. Introduced as a psychopath with a warped , sadistic sense of humor , the character became a goofy prankster in the late 1950s in response to regulation by the Comics Code Authority , before returning to his darker roots during the early 1970s .. psychopath. Psychopathy. Comics Code Authority. Comics Code Authority. As Batman 's nemesis , the Joker has been part of the superhero 's defining stories , including the murder of Jason Todd -- the second Robin and Batman 's ward -- and the paralysis of one of Batman 's allies , Barbara Gordon .. Batman. Batman ( 1989 film ). Jason Todd. Jason Todd. Robin. Robin ( comics ). Barbara Gordon. Barbara Gordon. The Joker has had various possible origin stories during his decades of appearances .. The most common story involves him falling into a tank of chemical waste which bleaches his skin white , turns his hair green , and his lips bright red ; the resulting disfigurement drives him insane .. The antithesis of Batman in personality and appearance , the Joker is considered by critics to be his perfect adversary .. Batman. Batman ( 1989 film ). The Joker possesses no superhuman abilities , instead using his expertise in chemical engineering to develop poisonous or lethal concoctions , and thematic weaponry , including razor-tipped playing cards , deadly joy buzzers , and acid-spraying lapel flowers .. The Joker sometimes works with other Gotham City supervillains such as the Penguin and Two-Face , and groups like the Injustice Gang and Injustice League , but these relationships often collapse due to the Joker 's desire for unbridled chaos .. Injustice Gang. Injustice Gang. Injustice League. Injustice League. Gotham City. Gotham City. Penguin. Penguin ( comics ). Two-Face. Two-Face. The 1990s introduced a romantic interest for the Joker in his former psychiatrist , Harley Quinn , who becomes his villainous sidekick .. Harley Quinn. Harley Quinn. Although his primary obsession is Batman , the Joker has also fought other heroes including Superman and Wonder Woman .. Batman. Batman ( 1989 film ). Superman. Superman. Wonder Woman. Wonder Woman. One of the most iconic characters in popular culture , the Joker has been listed among the greatest comic book villains and fictional characters ever created .. comic book. American comic book. The character 's popularity has seen him appear on a variety of merchandise , such as clothing and collectable items , inspire real-world structures -LRB- such as theme park attractions -RRB- , and be referenced in a number of media .. The Joker has been adapted to serve as Batman 's adversary in live-action , animated , and video game incarnations , including the 1960s Batman television series -LRB- played by Cesar Romero -RRB- and in film by Jack Nicholson in Batman -LRB- 1989 -RRB- , Heath Ledger in The Dark Knight -LRB- 2008 -RRB- , and Jared Leto in Suicide Squad -LRB- 2016 -RRB- .. Batman. Batman ( 1989 film ). Cesar Romero. Cesar Romero. Jack Nicholson. Jack Nicholson. Heath Ledger. Heath Ledger. The Dark Knight. The Dark Knight ( film ). Jared Leto. Jared Leto. Suicide Squad. Suicide Squad ( film ). Mark Hamill , Troy Baker , and others have provided the character 's voice .. Mark Hamill. Mark Hamill. Troy Baker. Troy Baker
related.