Millenniummon

Millenniummon
Millenniummon is a Composition Digimon whose name is derived from "Millennium". 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.

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 Battle Spirit
Millenniummon appears as the final boss of the game.

Digimon World Dawn and Dusk
You get Millenniumon by DNA digivolving Kimeramon and Machinedramon with 27000 Dark Species EXP, 320+ Attack, and Lvl. 55.

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.

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

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.

Moon=Millenniummon
Moon=Millenniummon is an Evil God Digimon. He only appears once Millenniummon is killed. A spirit Digimon with no physical form, meaning physical attacks cause him no harm,and because of the crystal that surrounds it, it's protected from launching attacks which are shooting energy.

Digimon Adventure 02: Tag Tamers
Moon=Millenniummon digivolves from MetalGreymon in line 37.

Digimon Adventure 02: D-1 Tamers
Moon=Millenniummon is the final boss of Digimon Adventure 02: D-1 Tamers, as well as a playable Digimon.

Digimon World Dawn/Dusk
Moon=Millenniummon digivolves from Kimeramon. Moon=Millenniummon is one of 3 opponents in the Silver Rank battle.

Attacks
 * Dimension Destroyer: Annihilate the pocket dimensions it has created.
 * Death Crystal: Destroys his enemy's heart/soul.
 * Killer Light
 * Crystal Drop

ZeedMillenniummon
ZeedMillenniummon is an Evil God Digimon that digivolves from Moon=Millenniummon. A single ZeedMillenniummon exists at once at all points in time and space.

ZeedMillenniummon can move freely between all parallel worlds, the past and the future. He appears as a two-headed dragon with his bottom portion trapped in a crystal. His body is surrounded in chains of Fractal Code to negate his powers.

Digimon Tamers: Brave Tamer
The ZeedMillenniummon card, titled "PF Millennium", allows Cyberdramon to digivolve to ZeedMillenniummon instead of Justimon when equipped.

Digimon World Dawn/Dusk
ZeedMillenniummon is obtainable through DNA Digivolution of Moon=Millenniummon and Gigadramon. You need to have both digimon at level 77+, 77,000+ dark exp, and an attack of 450+. He is also a member of Gaia Origin.

Attacks
 * Time Destroyer: Sends his enemies to the other side of space-time.
 * Chrono Paradox: Fires two atomic rays out of his mouths that destroy everything in their way. This is used as a similar "delete command" that some mega-leveled digimon have in their arsenal.