The Digital World is becoming so overpopulated that the super computer Yggdrasill who governs the Digital World can no longer handle it. Its solution is Project Ark: to wipe out most of inhabitants with the X Program. Yggdrasill chooses a very small percentage to be moved to a new Digital World and then proceeds to destroy the old one. Some Digimon who were not chosen survive anyway, and they move to the new world with a rare gift known as the X Antibody; this antibody changes their appearance and makes them more powerful, while at the same time making them immune to the X Program. No longer in control, Yggdrasill uses the Royal Knights to destroy these X-Digimon, who are outcasts in the new Digital World.
| Actor | Role |
|---|---|
 Minami TakayamaDorumon (voice) | Dorumon (voice) |
 Chika SakamotoWargreymon X (voice) | Wargreymon X (voice) |
 Hideyuki TanakaOmegamon (voice) | Omegamon (voice) |
 Masako NozawaDukemon (voice) | Dukemon (voice) |
 Miwa MatsumotoTokomon (voice) | Tokomon (voice) |
 Akira IshidaWizardmon (voice) | Wizardmon (voice) |
 Atori ShigematsuGarudamon X (voice) | Garudamon X (voice) |
 Hiroaki HirataLeomon (voice) | Leomon (voice) |
 Junko NodaMagnamon (voice) | Magnamon (voice) |
 Kiyoyuki YanadaAndromon (voice) | Andromon (voice) |
 Cocoro KikuchiKokuwamon X (voice) | Kokuwamon X (voice) |
 Koichi TochikaSylphimon (voice) | Sylphimon (voice) |
 Mayumi YamaguchiMetalgarurumon X (voice) | Metalgarurumon X (voice) |
 Ryotaro OkiayuRhodoknightmon (voice) | Rhodoknightmon (voice) |
 Satoshi TakiHanumon (voice) | Hanumon (voice) |
 Toshiyuki MorikawaMummymon (voice) | Mummymon (voice) |