Also known as: ミレニアモン
A Composition Digimon. Millenniumon resembles a large feral beast, with four long, thin arms and large claws, and two large cannons on its back. It is said to be the fusion of a mechanical amalgam and an organic aberration, and exudes immense power that transcends the limits of time and space.
In addition, it has two other forms: MoonMillenniumon and ZeedMillenniumon.