Dorumon

Dorumon is a Beast Digimon and carrier of the X-Antibody whose name is derived from "DIGITAL OR UNKNOWN MONSTER". Because it has an old-style interface on its brow, it has been conjectured to be an experimental "Prototype Digimon" from before Digimon were discovered. The personality of natural Combat Species Digimon manifests particularly strongly within it, so its combat instinct is high, and it often barks and snaps at everything, but it seems that it was tamed by someone it once bit. The data that is said to have been hidden within the deepest parts of its DigiCore, during an experiment, is the potent life-force data of the legendary beast, the "Dragon", and it is said it has the potential to grow into a mighty Digimon.

Digimon World Data Squad
Its a digivolution of Agumon and you can get it if Agumon digivolves into 6 DR type digimon. Later you can digivolve them into Belphemon.

Digimon Chronicle
Dorumon is Kouta Doumoto's partner. He soon digivolves into Dorugamon in 1.0, but is a Reptiledramon in 3.0.

Digimon World 4
Dorumon is a Bash specialist, and is one of the four starting Digimon.

Digimon World DS
Dorumon digivolves from Dorimon, and can digivolve further into Dorugamon with high