Hagurumon is a mutant Machine Digimon with a main body resembling a large gear. It has countless other gears built into its body, all of which are constantly spinning. If even one gear is removed, all of its other gears will stop turning and Hagurumon will cease functioning. Hagurumon has an ability that allows it to infect others with a virus so it can control them. For this reason, malicious Digimon often make use of Hagurumon. Since Hagurumon has no sense of self, though, it has no way of knowing it is being used for evil. Its special move is Cog Crusher, by which it implants a black gear loaded with a computer virus into its opponent’s body, causing them to go berserk.