Moon=Millenniummon

Moon=Millenniummon is an Evil God Digimon whose name and design are derived from "-Millenniummon". It is a soul Digimon that exists within Millenniummon's inner world. As a result of Millenniummon's dark spirit becoming a Digimon, it does not possess a fixed form, and although it often takes the shape of a crystal, it seems that the hatred and anger it feels against those who oppose it cause it to change shape. As it is a soul and does not have substance, it is immune to physical attacks. To defeat Moon=Millenniumon, one must first defeat Millenniummon, its true form, but it's likely there are virtually no Digimon who are up to that task; even if Millenniummon is somehow defeated, it is said that Moon=Millenniummon will separate from its now-dead physical form and be revived throughout time and space.

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 Data Squad
Moon=Millenniummon apears as a boss in the. After its defeat, the DATS members obtain the Red Jewel.

Moon=Millenniummon is also one of 's Mega forms.

Digimon World Dawn and Dusk
Moon=Millenniummon is #371, and is a Mega-level, MPtype-class, Dark-species Digimon with a resistance to the Dark element and weakness to the Light element. Its basic stats are 321 HP, 356 MP, 176 Attack, 172 Defense, 184 Spirit, 140 Speed, and 88 Aptitude. It possesses the Heroic Power, Heroic Guard, Dark Veil, and StatusBarrier traits.

Moon=Millenniummon is one of 3 opponents in the Silver Rank battle.

Moon=Millenniummon digivolves from Kimeramon. In order to digivolve to Moon=Millenniummon, your Digimon must be at least level 66, with 370 spirit, but only if you have previously befriended a Milleniummon.

Moon=Millenniummon can DNA Digivolve to ZeedMillenniummon with Gigadramon.

Moon=Millenniummon can be hatched from the Millennia Egg.

Attacks
 * Death Crystal: Performs an incorporeal attack that is said to chop up the opposing Digimon's spirit.
 * Dimension Destroyer