Monster Isle.

Monster Isle is an island located near the city of Townsville, and is populated by monsters. 


Monster Isle is the home of most if not all of the Monsters. If a monster goes to Townsville, fights the Powerpuff Girls and makes it back alive before dark, they are a hero as described by Steve the Monster.

In "Monstra-City," the Mayor of Townsville and Winthrop Mangrove find the deed to Monster Isle in order to develop the company "Mayor Toys" enough for the monsters to head to Townsville. The Powerpuff Girls had to maintain the peace which proved difficult until the Townsville citizens and the monsters agreed that the only thing they have in common is that they dislike each other. With the help of a giant monster lawyer, the monsters end up filing a class-action lawsuit against the Mayor which can be avoided if he signed the paper that would give Monster Isle back to the monsters. The Mayor does so to avoid the lawsuit.

Monsters Isle inhabitants


  • Monster Isle is a reference to Monster Island , a fictional location in which giant monsters live on, such as Godzilla.
    • It is also a reference to Monster Isle from Marvel Comics.