User blog comment:Flagator24/Total Drama theories/@comment-4389268-20180820154553

Putting real life knowledge here, it is very unlikely Izzy  have MPD like Mike. It is likely she has Attention Deficit hyperactivity disorder. In fact, studies show people with high IQs have rather odd behaviour and even Einstein shows some of these traits when he was a kid.

For TDR, it is common for kids her age to have crazy imagination. There was this show back in late 2000s in Disney Channel (cant remember the name) where a trio of kids let put their vivid imagination into the real world (like boogeyman is actually the father coming home late). The Rugrats also have a lot of crazy imagniations. And dont get me started with Ralph Wiggum of Simpsons and some of the PPG's classmates.