Mpd did my friend thinks he's got it can i get some info with some of the info i have collected?

Serious danger: Multiple personality disorder / dissociative identity disorder isn't something that an excitable teen, especially in a difficult life situation, wants to self-diagnose. Like all "pop" ideas about the mind, mental illness, memories / forgetting of child abuse, there's a lot of disinformation out there that can seriously harm him. Get him to a scientific, evidence-based therapist now.