Prototype Digimon

Prototype Digimon (プロトタイプデジモン, Purototaipu Dejimon) refers to experimental Digimon that served as the basis for the creation of new Digimon or for other specific experiments. The Prototype Digimon that exist from before Digimon were discovered have an outdated Interface on their brow that allows to reconfigure the data stored within their Digicores for such experiments.

DORU Series
The "DORU Series" (ドルシリーズ, Doru Shirīzu), a portmanteau of "Digimon OR Unknown-Monsters", is a term which refers to a series of Digimon created to experiment in search of further evolutions. During an experiment the potent life-force data of the legendary beast, the "Dragon", was hidden within the deepest parts of their Digicores, giving them the potential to grow into mighty Digimon. The "DORU" in DORUmon's name seems to be a remnant of this term.

Furthermore, because of the experiments, Digimon of the "DORU Series" can force the X-Antibody within their Digicores to allow them to remain functioning even after they have died, evolving through an special type of evolution known as "Death-X-Evolution", whose mysteries are known to Grand Dracumon. Despite their deceased condition, they can remain active by preying on the Digicores of other Digimon.

Cyborg Prototypes
Andromon and Boltmon were developed at the same time by a group of scientists as the prototypes for Cyborg Digimon. Andromon was made emotionless and mechanically-based, while Boltmon was organically-based and as such possessed emotions and power that surpassed Andromon's. Their technology was later successfully adapted into other Cyborg Digimon such as Metal Greymon and Megadramon.

Moreover, it is thought that all of the Cyborg Digimon created before Mugendramon were merely its prototypes.

Other prototypes
Ryudamon was a prototype Digimon created to pursue further fighting strength. During an experiment the ferocious combat data of the "Dragons" and "Generals" of Japanese mythology was hidden within the deepest parts of its Digicore, giving it the potential to grow into mighty Digimon.

It is uncertain if Chimairamon was built as a prototype for Mugendramon or to be used against it.

Plotmon was created as an experimental Digimon to imitate the pets that live with humans, and because of that has an appearance close to that of a real animal.

Snimon was created as an experimental Virus Hunter Digimon, designed to track down targets as if it were a precise machine.

Rinkmon was created when an experimental Digimon, the "Digimental of Friendship", and the sample data of an experiment that accelerated s to the with an, were fused.

It is said that N.E.O, a mysterious digital lifeform, is the basis for "Next-generation Digimon" sent by the system that governs the Digital World, although this is just an hypothesis.

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