A mutated machine Digimon with a body composed of countless turning gears. If even a single gear is removed, all of the other gears will stop turning and it will be unable to maintain its life force. Hagurumon can transmit a computer virus to its opponent and control it, an ability exploited by villainous Digimon. Hagurumon has no sense of self, and doesn't understand it's being used for evil. Its special move Cog Crusher buries an infected black gear in its opponent, driving them crazy.