Alphamon

Alphamon
Alphamon is a Warrior Digimon whose name is derived from. While it is one of the "Royal Knights", it is said that to Holy Knights it is a being like a deterrent force, and in normal times it doesn't appear, so it is even called the "Aloof Hermit" with a fluttering blue mantle, and is the Royal Knight that is assigned to the place called the "Empty Seat". In battle, it possesses the ability for the ultimate force, "Alpha inForce" (from Alpha Gain Force), which instantaneously replays the battle's past, so although Alphamon's attack are over in just an instant, you can't grasp how many attacks it actually unleashed, and in theory, you can only see the final blow that brought down the opponent. It can deploy a magic circle of DigiCode from its hands, which attacks and defends. It wields the "Seiken Gradalpha" (聖剣グレイダルファー), which is based on Grademon's "Souken Gradalpha" (双剣グレイダルファー)).

Suerpbly illuminating data here, thanks!

Digimon World 4
If you chose Agumon in the beginning, you can get him by going on the Booster Pack Collection sidequest set by the Digi-Elfs in the Terminal Area and completing the dungeon with only 1 HP, without recovering your HP or using a Gate Disk. This must be done on Hard mode. If you chose Veemon or Dorumon in the beginning, go on the "Treasure Hunt" sidequest set by the Digi-Elfs in the Central Area. Complete the dungeon, and bring back the Sword Cannon Delta. This must be done on Hard mode. If you chose Guilmon in the beginning, complete Item Road after completing the game on Hard mode.

Digimon World DS
Alphamon, the main antagonist, believes that humans are a threat to Digimon. As "Unknown-D", he attempts to eliminate the humans, and his plan eventually awakens the Legendary Digimon, Chronomon. Once he realizes that the was wrong, he attacks the protagonist tamer, but fails.

Digimon World Dawn and Dusk
Alphamon digivolves from Knightmon at level 65, with 50,000 Holy experience, but only if the player has obtained Clockmon. It can also be DNA digivolved from DoruGreymon, MagnaAngemon, or Magnamon if Lv 61, Holy EXP 45000 and Spirit 400.

An Alphamon is part of the Gaia Origin alongside an Omnimon.

Digimon Battle
Alphamon is a card digivolution of Dorumon. In order to unlock this digivolution, you must card digivolve DexDorugamon to Dorugamon, DexDoruGreymon to DoruGreymon, and finally DexDorugoramon to Alphamon.

Attacks
 * Seiken Gradalpha: Draws out a convergence of light that was pierced into the center of a magic array, and stabs it through the opponent.
 * Digitalize of Soul: Spreads the wings on its back and flies up high, then deploys a magic circle even larger than the sky, with which it summons a legendary monster from another dimension.

Alphamon Ouryuken
Alphamon Ouryuken is a Holy Knight Digimon whose name is derived from. It is a form in which Owryumon achieved a miraculous evolution and became the Ouryuken (王竜剣) sword, through the operation of the magic circle of DigiCode that Alphamon unleashed. Owryumon is the Mega of the experimental "Prototype Digimon" that pursued further fighting strength, and by becoming a sword, all of that fighting strength was devoted exclusively to its attacks. To swing the Ouryuken is to wield all of the power contained within a Mega Digimon, so to speak, so it isn't a sword that can be swung by an average Digimon, and there aren't any average Digimon that can take the blow.

Digimon D-Cyber
Attacks
 * Ultimate-Battle-Blade-OURYUKEN (究極戦刃王竜剣): Swings the Ouryuken.
 * Digitalize of Soul: Fires multiple green energy beams from its hands.