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The X-Men are a fictional team of superheroes appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist/co-writer Jack Kirby, the characters first appeared in The X-Men #1 (September 1963). They are among the most recognizable and successful intellectual properties of Marvel Comics, appearing in numerous books, television shows, films, and video games.
The X-Men are mutants, a subspecies of humans who are born with superhuman abilities. The X-Men fight for peace and equality between normal humans and mutants in a world where antimutant bigotry is fierce and widespread. They are led by Charles Xavier, also known as Professor X, a powerful mutant telepath who can control and read minds. Their archenemy is Magneto, a powerful mutant with the ability to generate and control magnetic fields. Professor X and Magneto have opposing views and philosophies regarding the relationship between mutants and humans. While Professor X works towards peace and understanding between mutants and humans, Magneto views humans as a threat and believes in taking an aggressive approach against them, though he has found himself working alongside the X-Men from time to time.
Professor X is the founder of Xavier's School for Gifted Youngsters at a location commonly called the X-Mansion, which recruits mutants from around the world. Located in Westchester County, New York, the X-Mansion is the home and training site of the X-Men. The founding five members of the X-Men who appear in The X-Men #1 (September 1963) are Angel (Archangel), Beast, Cyclops, Iceman, and Marvel Girl (Jean Grey); Professor X and Magneto also make their first appearances in The X-Men #1. Since then, dozens of mutants from various countries and diverse backgrounds have held membership as X-Men.
Deadpool (real name Wade Winston Wilson) is a fictional antihero appearing in American comic books published by Marvel Comics. Created by artist/writer Rob Liefeld and writer Fabian Nicieza, the character first appeared in The New Mutants #98 (cover-dated February 1991). Initially Deadpool was depicted as a supervillain when he made his first appearance in The New Mutants and later in issues of X-Force, but later evolved into his more recognizable antiheroic persona. Deadpool is a disfigured and mentally unstable mercenary with the superhuman ability of an accelerated healing factor granted to him by Dr. Emrys Killebrew of Weapon X and physical prowess. He is known as the "Merc with a Mouth" because of his talkative nature and tendency to break the fourth wall, which is used by writers for humorous effect and running gags.