Millenniummon

Millenniummon is a Composition Digimon. It fused the overwhelming power possessed by Machinedramon and the data of various powerful Digimon possessed by Kimeramon. It is said to be impossible to defeat, and at present, the unclear cause of its fusion is being ascertained, but it is unlikely that any clues will be found.

Attacks
 * Time Unlimited: Creates a pocket dimension with compressed time, and traps an opponent there for an eternity.
 * Dimension Destroyer: Destroys the pocket dimension it created.
 * ∞ Cannon: Fires superdreadnought-class energy waves from its two cannons.
 * Ultimate Fusion

Design
Millenniummon is the combination of Kimeramon and Machinedramon. Millenniummon retains most Kimeramon's chimeric Digimon parts, albeit with a darker color scheme. Its wings and tail are replaced by Machinedramon's aura, which visibly retains its Psycho Blasters.

In Digimon Adventure:, Millenniummon has red glowing eyes.

Etymologies
Official romanization given by the Digimon Reference Book and used in Japanese media.
 * Millenniumon (ミレニアモン)
 * (En:).

Name used in Digimon World Dawn and Dusk and other American English media.
 * Millenniummon
 * (En:).

Digimon Adventure 02: Tag Tamers
Millenniummon digivolves from a Megadramon in line 33.

Digimon Adventure 02: D-1 Tamers
It is possible to obtain a Millenniumon by fusing a Machinedramon and a Kimeramon and obtaining 96 jogress points.

Digimon Tamers: Brave Tamer
According to Takato, Millenniummon is a very rare card.

D-Ark 1.0
Millenniummon is a wild Digimon with 15 HP and 4 AP. It is #49 in the D-Ark Notes, and its codes are -576 and -696. It appears as the boss of Secret S.

D-Tector 2.0
In the Japanese release of D-Tector 2.0, Millenniummon can be obtained by scanning.

Digivice:
Millenniummon is defeated by the 's Partner Digimon.

Digimon World Dawn and Dusk
Millenniummon is #370, and is a Mega-level, Attacker-class, Dark-species Digimon with a resistance to the Dark element and weakness to the Light element. Its basic stats are 316 HP, 346 MP, 175 Attack, 138 Defense, 159 Spirit, 134 Speed, and 77 Aptitude. It possesses the Heroic Power, Dark Veil, Critical 4, and EX Damage 4 traits.

Millenniummon can DNA digivolve from Kimeramon and Machinedramon, if the base Digimon is at least level 55, with 27,000 Dark experience, and 320 attack.

Millenniummon can be hatched from the Millennia Egg.

Digimon Story: Lost Evolution
Milleniummon is #253, and is a Mega-level, HP-type, Dark-species Digimon with a resistance to the Dark and Earth elements and a weakness to the Holy and Water elements. It possesses the Poison Barrier, Paralysis Barrier, God Eye, and Stun Barrier traits.

It dwells in the Risk Factory.

Milleniummon digivolves from Kimeramon and can digivolve into Moon=Millenniummon and ZeedMillenniummon. In order to digivolve or degenerate into Milleniummon, your Digimon must be at least level 40 with 180 attack, but only once you have revived Milleniummon and Machinedramon and befriended a Monodramon.

Digimon Story: Super Xros Wars Blue and Red
Millenniummon DigiFuses from Kimeramon and Machinedramon, and can DigiFuse to Moon=Millenniummon with Devitamamon and GranDracmon, and to ZeedMillenniummon with Moon=Milleniumon and Gulfmon.

Digimon Masters
Millenniumon is a Jogress level Digimon that Jogress' from Machinedramon and Kimeramon.

Digimon Heroes!
Millenniumon digivolves from Chimairamon, and can also DNA digivolve to ZeedMillenniumon with Mugendramon and Chimairamon.

Digimon Links
Millenniummon digivolves from Kimeramon and Machinedramon.

Digimon ReArise
When Eiji and Mon's Mother finds a group of Vademon, having heard they could open portals to other Worlds, they open a gate to another World only for a Millenniummon to come out of it and start rampaging in the Digital World. Though their mother is able to escape, she eventually passes away from the injuries sustained whilst escaping. Millenniummon was eventually defeated at some point.

More than a decade later, is not powerful enough in its Rookie form to destroy the World and instead decides to ask the Vademon where they had summoned Millenniummon in the past and then travels there. After finding the location it is ambushed by and  of the, though is still able to go back in time (taking the Royal Knights with it) to when Millenniummon was summoned so that it could ambush it and then seal off its will and mind so that it would do its bidding and also planned to force it to digivolve to its "final World destroying form", then would return with it to the future and destroy the World. The Royal Knights state they will not allow that to happen, though when Millenniummon arrives the gate suddenly gets interfered with, with having been convinced by  to help as well. It then travelled back in time as well to stop Lucemon's plan and was able to interfere with the ritual, causing Millenniummon to instead appear as an illusion. The three of them then continue to fight Lucemon and eventually are joined by the ghosts of and, with  and  having convinced them to stop Lucemon from destroying the World. The Legendary Warriors see that it is not powerful enough on its own whilst in its Rookie form to destroy the World which is why it needed Millenniummon's power and since Goblimon and Raremon had asked them to stop Lucemon, not kill it, they decide to instead seal away Millenniummon and are able to do so with the help of Mastemon and Rasielmon. The Royal Knights then kill Lucemon.

Millenniummon is an Ultra level Digimon that digivolves from Machinedramon.

DigiWindow
Millenniummon appears in the sixth Northwest area of Dark Castle and can be unlocked by winning the "Skull" mini-game.