Mike's alternate personalities are different aspects of Mike all residing within his subconsious. Through the use of triggers, his personalities can be activated or used. However, Mike keeps these personalities hidden from everyone due to fear of being thought as a freak by Zoey.
Mal, labeled The Malevolent One, is a locked personality within Mike's subconsious. He is the main antagonist of Total Drama All-Stars. However, unlike the other villains in the series, Mal thrives for only chaos and doesn't care about winning the season.