Vemmon

Vemmon resembles a small alien, with two-fingered hands and reverse-jointed legs. Its whole body is a shade of purple, its helmet slightly darker than its torso. Vemmon has green eyes, and his left one is hidden by the black visor on its helmet, which completely covers its elongated head. A chain is attached to its neck for some unknown reason.

Digimon World 3
Vemmon at first appears to be very weak. Its basic attack is relatively harmless, but has the annoying side-effect of stealing your Digimon's MP, preventing them from using special attacks. This means that Vemmon is somewhat of a vampire.

Vemmon's true power, however, is far more incredible. It is an artificial Digimon, created by humans as a multi-purpose weapon. Vemmon have the unique ability to combine their matrix data with technology, allowing them to turn themselves into a living embodiment of the machine they assimilate. In the game, only two ever achieve this, and both were ultimately destroyed. Late in the game four Vemmon fused in order to combine their matrix data to digivolve into Snatchmon, which is capable of completely absorbing other forms of life.

Vemmon also had an ability to turn humans into Oinkmon, a pig-like Digimon of little use or importance. After the destruction of Galacticmon, it is assumed that all Vemmon are either freed from the control of their corrupt human masters, or destroyed outright.