Dragomon

Dragomon is a Sea Animal Digimon whose name is derived from the fictional and whose design is derived from the fictional  and the mythological. It is an evil god Digimon called the "Depraved Monk of the Deep" (Sinful Priest of the Ocean Floor). It is thought to have evolved from a computer virus that would infect the computers aboard ships and the like, then knock their direction and course out of order. It bundles up its innumerable, multiplying tentacles, and takes on a humanoid appearance, but its true shape is a strange evolution of a Mollusk Digimon. For its defeated opponents, it wears a prayer beads around its neck, and adopts a pose similar to mourning. The DigiCode on its trident reads Dejitaru Monsuta (デジタルモンスタ).

Digimon Adventure 02
Dragomon is the rarely seen "Dark Undersea Master" of the Dark Ocean, served by the Scubamon who worship him. Though the Scubamon were enslaved by the Digimon Emperor and attempted to take Kari Kamiya upon her releasing them, they decided to return to their master. After Kari and T.K. Takaishi left for their world, Dragomon's shadowed form emerges from the Dark Ocean.

Digimon World 2
Dragomon digivolves from Octomon, and can digivolve further into Pukumon.

Digimon World 3
Dragomon can be found in Amaterasu's Seabed towards West Sector.

Digimon World DS
Dragomon digivolves from Sukamon. Dragomon also appears while at Training Peak, he is however destroyed by Cyberdramon's Erase Claw (who appeared just in time with his Tamer Yuji), these events take place after Calumon asks you to find him a Digi-Cake. Dragomon is sometimes found in the Drain Tunnel.

Digimon World Dawn/Dusk
Dragomon is #212, and is an Ultimate-level, Technical-class, Aquan-species Digimon with a resistance to the Water element and weakness to the Steel element. Its basic stats are 208 HP, 255 MP, 130 Attack, 114 Defense, 120 Spirit, 89 Speed, and 58 Aptitude. It possesses the Psychic 4, DarkBreath4, and Mist Cape4 traits.

It dwells in the Macro Sea.

Dragomon digivolves to Neptunemon. In order to degenerate to Dragomon, your Digimon must be at least level 38, with 4100 Dark experience, but only if you have previously befriended a Dragomon.

Dragomon can also DNA digivolve from Octomon and Gesomon, if the base Digimon is at least level 33, with 3800 Dark experience, and 200 spirit. Dragomon can DNA digivolve to VenomMyotismon with Pipismon.

Digimon Story: Lost Evolution
Dagomon is #136, and is an Ultimate-level, Attacker-class, Aquan-species Digimon with a resistance to the Water and Dark elements, and a weakness to the Thunder and Holy elements. It possesses the Confusion Guard, Item Hunter, and Skill Master traits, and has the special skill Dive.

It dwells in the Access Glacier. When defeated, it can drop the debug plate for Dagomon or Neptunemon.

Dagomon digivolves from Octomon and can digivolve into Neptunemon. In order to digivolve or degenerate into Dagomon, your Digimon must be at least level 29 with 110 attack and 110 defense, but only once you have revive Dagomon.

Attacks
 * Forbidden Trident: Throws its trident with tremendous physical strength.
 * Tentacle Flapping (無数の触手)
 * Thousand Whip
 * Tentacle Claw