Ever since Charles Xavier opened his school's doors to the mutants of the world, his X-Men have welcomed those from all walks of life into their ranks! Collected here for the first time, see how your favorite mutants joined your favorite mutant team! Witness the initiations of Marvel Girl! Wolverine! Colossus! Nightcrawler! Banshee! Storm! Kitty Pryde! Rogue! Magneto! Gambit! Bishop! And Pixie! Featuring the threats of the Hellfire Club, Fenris, Fitzroy, the N'Garai and the Shadow King! Collecting: X-Men (1963) #1 & #129, Giant-Size X-Men #1, Uncanny X-Men #171, #200, #213, #267 & #287, New X-Men (2001) #116, Free Comic Book Day: X-Men 2008