Ryudamon

Ryudamon is a Dragon Digimon and a carrier of the X Antibody. Because it has an old-style Interface on its brow, it is presumed to be an experimental "Prototype Digimon" from before Digimon were discovered. Although its body is clad in Japanese-style armor high in defensive ability, its movements are nimble, so it fights by resolutely leaping into the opponent's chest. It studies the business of combat so that it is strong enough to fight, and possesses, with bravery and a soul that doesn't fear more powerful Digimon. The data that is said to have been hidden within the deepest parts of its DigiCore, during an experiment, is the ferocious combat data of the "Dragons" and "Generals" of Japanese mythology, and it is said it has the potential to grow into a mighty Digimon.

Attacks
 * Kabutogaeshi (兜返し): Withstands the opponent's attacks with its armor and helmet, then counterattacks.
 * Katana Attack (居合刃): Leaps into the opponent's chest and fires a blade of iron from its mouth.
 *  BURST: Blasts the opponent with multiple explosions.

Design
Ryudamon takes the theme of its line to its logical conclusion, actually becoming the dragon that is the literal name of the Ryū-ou (竜王) chess piece. It wears Japanese-style armor emphasize its Japanese nature, and it has the old-style Interface on its brow that marked its association with the X-Antibody storyline at its debut, similar to Dorumon.

Etymologies
Official romanization given by the Digimon Reference Book and used in the franchise.
 * Ryudamon (リュウダモン)
 * (Ja:) Ryū-ou (竜王), the Promoted Rook chess piece in.

Digimon Battle
There is a quest where you can rent a Ryudamon or Yaamon. To keep the Ryudamon you must get it to LVL 61 and digivolve it to Ouryumon. The quest is at MudFrigimon village. Ryudamon can digivolve to Ginryumon.

Digimon Masters
Ryudamon is an obtainable mercenary digimon. It digivolves into Ginryumon at LVL 11, Hisyaryumon at LVL 25, and OuRyuumon at LVL 41.

Digimon Soul Chaser
Ryudamon can digivolve to Ginryumon.

Digimon Story: Cyber Sleuth
Ryudamon is #328 and is a Neutral Vaccine Type, Rookie level Digimon and uses 5 memory. It digivolves from Wanyamon and can digivolve to Ginryumon, Raptordramon, and Reppamon. Its special attack is Katana Attack and its support skill is Samurai Spirit which increases attack by 10% and the chance for all attacks to be a critical hit by 10%.

Digimon Story: Cyber Sleuth - Hacker's Memory
Ryudamon is #328 and is a Neutral Vaccine Type, Rookie level Digimon and uses 5 memory. It digivolves from Wanyamon and can digivolve to Ginryumon, Raptordramon, and Reppamon. Its special attack is Katana Attack and its support skill is Samurai Spirit which increases attack by 10% and the chance for all attacks to be a critical hit by 10%.