Deltamon is a Composition Digimon. It was fused from three Digimon, and although each of them had existed as separate Digimon, due to a computer running wild after it was struck by a storm's electromagnetic waves, they were forced to fuse by a computer bug. It is said that since this Digimon, which possesses three heads and two tails, specializes in tripartite attacks that capitalize on its body's traits, it is even able to fight against three Digimon as if they were one. However, because each of them was a fiendish Digimon, they are only of one mind on destruction, and are usually on bad terms with no spirit of cooperation.
- Triplex Force (Triple Force): Fuses and fires energy discharged from its three mouths.
- Serpent Bite (Skull Fang): Lunges with the Digimon on its left arm.
Deltamon is a blue bipedal dinosaur-like Digimon with red eyes, two tails, blue scales on its back, blue skin on most of its body, and white skin on its belly and nose. It has for toes on each foot, with one toe on the back of the feet, and a black claw on its toes. Its right tail has metal armor on its tip, and its left tail has the bones of its tip exposed. Deltamon has two reptilian heads on its arms, the right head having its top covered in metal armor, and the left head being a dinosaur skull. Deltamon has a "Δ"-shaped mark on its belly. Deltamon appears to be based the fictional King Ghidorah due to both being three-headed dragons. It also references the Δ-shape with its three heads at the letter's corners.
- Deltamon (デルタモン)
Official romanization given by the Digimon Reference Book and used in the franchise.
- El: "Δ". A Greek letter shaped like a triangle.
Digimon Adventure 02
In the Digital World's "Death Valley" (Forbidden Valley of No Return in dub) where the latest Control Spire is, the sand sucks in Yolei Inoue, Hawkmon, Cody Hida, Armadillomon, Takeru "T.K." Takaishi, Patamon, Kari Kamiya, and Gatomon, leaving Davis Motomiya and Veemon untouched. When encountering the Digimon Emperor, Davis's friends are suspended from the ground over a Deltamon who is under the control of the Digimon Emperor's Dark Ring. When the Digimon Emperor asks Davis which of his friends he will spare from Deltamon's triple appetite, Davis offers himself in their place, despite the Emperor's mocking reply that he will not satisfy Deltamon's hunger. Suddenly, Digmon appears with the others. The ones who were suspended are revealed to be Bakemon in disguise. Davis, angered by the Digimon Emperor's ploy, armor digivolves Veemon to Flamedramon. After the Digimon Emperor is attacked by Davis, he orders Deltamon to destroy him. However, Flamedramon intervenes and destroys Deltamon's Dark Ring before any damage could be done.
A Deltamon is among the Digimon in Ken's illusion delivering payback to the Digimon Emperor.
Digimon Adventure V-Tamer 01
Digimon World 2
Digimon World 3
Deltamon can be found in Amaterasu Server's Tyranno Valley. It can also be found in Asuka Server's Kicking Forest cliff , by stepping on a specific tile. It is also the first Digimon the Qing Long City Chief has. It is also available as a Brown Champion Card with 14/14. In the PAL version of the game, after defeating Galacticmon, Deltamon can be found in Amaterasu's East Sector, in East Wire Forest.
Deltamon digivolves from Dorumon.