Dorumon

Dorumon's Japanese name is DORUmon. His name is an acronym for DIGITAL OR UNKNOWN-MONSTER.

Due to having an old style interface on his forehead, this Digimon is gussed to be an experimental Prototype Digimon from before Digimon were discovered. Originally, the personality of a Digimon of a battle species had materialized particularly strongly, so his fighting instincts were high, and he would snap and howl at anything, but it seems that he tamed by someone he once bit. During an experiment, it was said that data has been hidden in the deepest part of his DigiCore that is the data of the strong life force of a legendary living dragon, so it is said that he has the potential to grow into a mighty Digimon. Within him is the X-Antibody, a program that makes him immune to the X Program. His birth is mysterious and his presence would turn out to affect the fate of the Digital World itself. Due to being a naturally-born X-Digimon, he is commonly ostracized by his peers.

Dorumon has 3 complete digivolution lines. All three lines have the same Fresh form Dodomon and In-Training form Dorimon. But they're different from Champion Level to Mega Level:
 * In the X-Evolution (Data), he will digivolve into Dorugamon, DoruGreymon and Dorugoramon.
 * In the Death-X-Evolution (Virus), he will digivolve into DexDorugamon, DexDoruGreymon, DexDorugoramon and Dexmon.
 * In the last digivolution line (Vaccine), he will digivolve into Reptiledramon, Grademon, Alphamon and Alphamon (UWBKD).

Digital Monster X-Evolution
The mysterious little Digimon known as Dorumon, characterised by the strange stone in his forehead, is, in actuality, not a Digimon but an artificial being created by Yggdrasil, the sentient computer that controls the Digital World, with the intention of using him to bring about the second phase of its Project Ark scheme.

Released into the Digital World, Dorumon was ostracised for possessing the X-Antibody and came under threat from other Digimon, including a Leomon, who sought to claim the X-Antibody for his own. Fleeing from the Leomon through a forest, Dorumon seemed doomed until Leomon relented, knowing that, even with the X-Antibody, he would live no longer. Asking Dorumon to live for him in the new Digital World, he died.

Bullied by a group of Mushroomon and forced to flee into a river, Dorumon came to rest in an old temple in a barren region of the plain, where he soon came into contact with WarGreymon X, who was in the middle of a battle with the Royal Knight, Omnimon, requested that Dorumon look after Tokomon until he returned. Dorumon agreed, happy to have a friend but soon, the duo witnessed another attack by Omnimon on a herd of innocent Digimon and, although they both bravely attempted to fight back against the Royal Knight, almost became victims themselves until WarGreymon X and MetalGarurumon X arrived to save them. In the course of the ensuing battle, however, Tokomon was fatally injured and MetalGarurumon X used his X-Antibody to resurrect him as Tokomon X. Weakened by this, MetalGarurumon X collapsed and Dorumon, believing he was dead, was overcome with emotion and memories of Leomon and Digivolved to his Champion form of Dorugamon.

Subsequently, Dorugamon was captured by Magnamon and had his data split by Yggdrasil, creating DexDorugoramon, who yielded Digi-Eggs that hatched into a swarm of DexDoruGreymon, which Yggdrasil would use to raze the Digital World. Dorugamon Digivolved to Dorugreymon to battle them and was then granted access to Yggdrasil’s realm by Gallantmon X to learn the secrets of his creation. There, in battle with Omnimon, he assumed his Mega form, revealing at last his true form and destiny – he was Alphamon, legendary leader of the Royal Knights. Together, Alphamon and Omnimon destroyed DexDorugoramon, who then revived as Dexmon and resumed the battle with them in Yggdrasil’s inner sanctum. Realising his connection to Dexmon, Alphamon sacrificed himself by impaling them both on his blade, passing his X-Antibody to Omnimon before recombining with Dexmon and forming Dorumon again. Omnimon subsequently destroyed Yggdrasil, re-birthing the Digital World as it had been and allowing Dorumon and Tokomon to be reunited.

''It is unclear what Dorumon’s specific connection to the legend of Alphamon is. There are two possible explanations – either Alphamon truly existed at a time in the past and Yggdrasil used his data in the creation of Dorumon or Dorumon was fulfilling the legend by becoming Alphamon for the first time. However if one was to say that Alphamon regained his memories when digivolving then the first is likely in that Yggdrasil used his data to recreate him in rookie form ''

Digimon Chronicle
Dorumon is Kouta's partner.

Digimon World 4
Dorumon, who is a Bash specialist, is one of the four starting Digimon.

Digimon World DS
Dorumon digivolves from Dorimon, and can digivolve further into Dorugamon with high level and high Beast EXP. Dorumon also prevents you from entering the Back Equipment and Back Item Shops if you are not a Silver Tamer.

Digimon World Dawn/Dusk
Dorumon digivolves from Dorimon and can further digivolve into dorugamon with 800 of beast exp.

Attacks
 * Metal Cannon: Shoots metallic projectiles from his mouth.
 * Dash Metal: Metal freezes the enemy.
 * Dino Tooth
 * Hyper Dash Metal
 * Metal Shoot: Releases a small shockwave from his mouth.