The only Digimon who willingly came to serve Devimon, under the promise to kill Leomon once Devimon no longer needed him. But prior to the final battle, Devimon grabbed Ogremon by the throat and transformed him into a mass of Black Gears that he assimilated, along with all the other Black Gears on File Island, into his body so he could have the power to destroy the DigiDestined.
