In X-Men United Alexander Burton was replaced by Aaron Stanford as Pyro.

Kurt Wagner alias Nightcrawler. The son of Mystique he was born a mutant and Mystique abandoned him. Kurt grew up in a circus. When an angry mob tried to kill Kurt professor Xavier rescued him. Kurt joined the Giant Size X-Men to rescue the original X-Men from Krakoa.

Henry "Hank" McCoy alias Beast. Henry was a founding member of the original X-Men. Originally looking human he attempted to cure himself of being a mutant. It backfired and Henry wound up looking like a blue primate. Now Henry is proud to be a mutant.