Inside Out 2 (the real one, that takes place in DreamWorksCompletist's mind)

Inside Out 2 is a fanfiction idea by DreamworksCompletist, and takes place in his mind, where it represents the five emotions from Inside Out, and featuring a neurotic adventure music loving brain named Co-Brain (voiced by Steve Buscemi, looks as he is in the picture above the info).
Cast: Actors/ actresses and then character names for each of the actors and actresses:
Steve Buscemi as Co-Brain, Amy Poehler as Joy, Kevin Kline as Tulio, Kenneth Branagh as Miguel, Rosie Perez as Chel, Armand Assante as Tzekel-Kan, Jim Cummings as Cortes, Jacob Hopkins as Gumball, Mindy Kaling as Disgust, Lewis Black as Anger, Bill Hader as Fear, Phyllis Smith as Sadness, Elton John as Co-Brain's singing voice during the song Without Question'', and Steve Buscemi as the narrator of the movie