Alphamon

Alphamon is the Mega form of Dorumon, a Digimon of great power of the "Alpha-Gain-Force". He is not just one of the 13 Royal Knights but also their leader of legend, destined to rule them yet condemned to be the "Lord of the Empty Seat," forever absent. Alphamon is also the only member of the knights who has his X-Antibody form the start, not being given or taken from a Digimon.

Digivolution

 * Fresh - Dodomon
 * In-Training - Dorimon
 * Rookie - Dorumon
 * Champion - Dorugamon, Reptiledramon
 * Ultimate - DoruGreymon, Grademon
 * Mega - Alphamon
 * Mega - Alphamon (Ultimate King Dragon) (+ OuRyuumon)

Attacks

 * Digitalize of Soul: He fires multiple energy beams from his hands.
 * Holy Sword Grade Alpha:

Digimon X-Evolution
When attacked by Omnimon, DoruGreymon Digivolved to Alphamon, regaining his memories. He told that that he can't forgive Yggdrasil and thus Omnimon immediately sided with him and took him to see Yggdrasil. Before they could enter Yggdrasil's chamber they had to face DexDorugoramon, whom Alphamon managed to destroy with his Digitalize of Soul attack. They then entered Yggdrasil's inner sanctum to destroy the host computer but then Dexmon (the reformed DexDorugoramon) appeared and a violent battle began. Powering up to Ouryuuken Mode (though this was never mentioned in the movie), Alphamon attacked Dexmon - but his body also suffered all attacks he inflicted on Dexmon. This caused Alphamon to realize that Dexmon was his "other half", created from the data Yggdrasil removed from Dorugamon's body. Knowing this, he hurled his blade in a boomerang arc and grabed Dexmon as the blade returned, impaling them both. Alphamon transferred his X-Antibody to Omnimon before merging with Dexmon and regressing back to Dorumon.