Monstro is a world that appears taking the form of the insides of a gargantuan creature of the same name. Monstro is an immense space whale that swims the Lanes Between, so large that its innards are a world to themselves, similar to Deep Space. Monstro is unique in that it is a both a world and a character. Plus, this means he is the only world from another world, Monstro's homeworld being Prankster's Paradise.
