X-Men: Evolution Season 4 Episode 7

Ghost of a Chance

Kitty is saved from a rockslide by a mutant girl named Danielle Moonstar. Danielle quickly joins the institute, but immediately causes trouble during a training session when she causes the nightmares of Jean, Kurt, and Kitty to come true. That night, Logan, Professor X, and Storm also have powerful nightmares, worrying Kitty that her new friend will be expelled from the institute. When Kitty wakes up the next morning, Danielle isn't there -- and when she asks, nobody has even heard of her. Kitty is determined to find Danielle Moonstar, and follows a path of strange messages that only she is receiving to her location.