As iconic as Huggy Wuggy may be, Poppy Playtime's scariest monster is the Prototype, otherwise known as Experiment-1006.

Experiment-1006, also known as the Prototype, is the main antagonist of Poppy Playtime and the overarching antagonist of its multiplayer prequel, Project: Playtime. He is a mysterious, intelligent and incredibly dangerous mechanical entity created by Playtime CO. that is greatly feared by its inhabitants.