| ENGLISH NAME | LEVEL | ATTRIBUTE | TYPE |
| ??? | Mega | Virus | Evil God Digimon |
| FIRST APPEARANCE | NAME ORIGINS | ||
| n/a | English. Moon. Millennium means 1000 years. | ||
| EVOLUTIONS | |||
| -none- | |||
| CARD NUMBER | SERIES | FAMILY |
| BO-343 | Booster Ver. 7 | Dark Area |
| LEVEL | ATTRIBUTE | TYPE |
| Mega | Virus | Evil God Digimon |
| A ATTACK | B ATTACK | C ATTACK |
| Death Crystal - 620 | Dimension Destroyer - 560 | Protect (A goes to 0) - 380 |
| APPEARANCE REQUIREMENTS | DESCRIPTION | COMMENTS |
| If you lose a battle as Millenniumon, send him to the Dark Area, take this card from your hand and place it directly in the Digimon Box and continue the battle. | You can't even meet this mysterious being unless you destroy Millenniumon! |
The opponent loses all special powers
and This Digimon cannot be affected by "A goes to 0" and If you lose the battle, instead of sending this card to the Dark Area, return it to your hand. |
| CARD NUMBER | SERIES | FAMILY |
| WS-2 | WonderSwan Promo | Dark Area |
| LEVEL | ATTRIBUTE | TYPE |
| Mega | Virus | Evil God Digimon |
| A ATTACK | B ATTACK | C ATTACK |
| Death Crystal - 680 | Dimension Destroyer - 520 | Protect (A goes to 0) - 600 |
| APPEARANCE REQUIREMENTS | DESCRIPTION | COMMENTS |
| If you lose a battle as Millenniumon, send him to the Dark Area, take this card from your hand and place it directly in the Digimon Box and continue the battle. | A spirit Digimon without physical form. No physical attacks can affect him! |
He cannot lose his special powers
and He is not affected by the opponent's Option cards and If you discard one Dark Area Digimon from your hand, attack triples (max. 1 card) |