Longshot starts with his own six-issue miniseries before he joins the X-Men. He turns up on Earth without a usable memory of his past, and people from that past don't conveniently leave him alone while he figures things out.
The series brings in Ricochet Rita, Quark, Spiral and Mojo. It also gets Spider-Man, She-Hulk and Doctor Strange involved. So by the time Longshot becomes an X-Man, he's already had a story of his own and an enemy who treats people like material for a show.
Mojo's world runs on spectacle and exploitation. Longshot comes out of that as somebody who has been used, has fought back, and can't even hold on to a clear account of his own life.
He's also not an ordinary human mutant who happened to be born with useful powers. He's from another dimension, with an artificially created background. Calling everybody on an X-Men lineup a mutant skips over quite a bit with him.
Longshot starts with his own six-issue miniseries before he joins the X-Men. He turns up on Earth without a usable memory of his past, and people from that past don't convenient…
· Comics / Marvel / X-Men