User blog comment:Flagator24/Total Drama theories/@comment-24152851-20180820100752

The official term is Dissociate Identity Disorder (DID). I don't think that's what Izzy has as her 'personalities' are mostly her acting or roleplaying. The only exception is Brainzilla but she's not quite the same thing as what Mike has either as the 'excessive intelligence from head trauma' seems more akin to savant syndrome