X-Men (Earth-101)

The X-Men is a team of superpowered mutants, at the side of good, maintaining the co-existence of mutants and humans alike founded by Charles Xavier.

History
The legendary X-Men is founded by Professor Charles Xavier, a mutant telepath who had spent many of his adult years studying mutation.

First Generation
When the world (Earth-101) was facing a threat from surviving members of the sovereign union with a powerful mutant group of Sebastian Shaw, Sabortooth, Azazel, Angel Salvadore and Riptide called Hellfire Club. The CIA and S.H.I.E.L.D join forces to ask for Charles's help, so Professor Xavier (who was called "Nightcrawler" at that time) decides to recruit Deadpool, Doctor Death, Box, Songbird, Lifeguard, Northstar, Wolverine, and Magneto (who was called "Magnetic" at that time) chanllenge them oversea at the atlantic ocean. After several courses, the X-Men of the first generation defeated the Hellfire Club, the end results were that not only did they recruited Angel Salvadore that time, but Magneto left the X-Men (recruiting Azazel and secretly Sabortooth and Juggernaut).

Second Generation
Following an encounter with the Shadow King, Nightcrawler (Charles Xavier) determined to protect the world from the threat of evil mutants as well as foster a world that would enshrine peaceful co-existence between humans and mutants. Recruiting his earlier students were Ororo Munroe (Storm), Emma Frost (White Queen), Hank McCoy (Beast), Sooraya Qadir (Dust) Danielle Moonstar (Mirage), Douglas Ramsey (Cypher), Warren Worthington III (Angel), and Joseph Xavier (adopted son/biological half-nephew of Charles Xavier, formerly named John Marko, codename Nightcrawler) as the second generation of the X-Men under Wolverine's leadership and the teaching of Logan (Wolverine) Madison Jeffries (Box), Alison Blaire (Dazzler), Heather Cameron (Lifeguard) and Jean-Paul Beaubier (Northstar). he eventually decided to start a school for mutants and train them to be what would eventually become the X-Men.

A few years later (after the retirement/betrayal of some of the founding member of the first generation; Angel Salvazar (retired member), Doctor Nemesis (traitor), Box (retired due to marriage), and Dazzler (retired due to marriage)) Nightcrawler eventually became Professor X, due to having his unknown paralysis at the waist down, Charles recruits two more young mutants, Scott Summers (Cyclops) and Jean Grey