Parasimon

Parasimon is a Parasite Digimon whose name and design are derived from "Parasite". It is a special Digimon that can't survive without leeching off of other beings, even though it is a Mega. Parasimon is powerless when by itself, but when it gathers in numbers, it can easily defeat Champion Digimon. When Parasimon leeches off of another, it can draw out the host Digimon's abilities to their utmost limit, exhibiting a dreadful power. Also, it can amplify the host's desires, and it is capable of taking advantage of those weaknesses. The existence of Parasite Digimon types other than Parasimon has been confirmed, and the influence of Parasite Digimon, in addition to viralization, is considered the cause of berserk Digimon.

Digimon World DS
Parasimon digivolves from Arukenimon.

Digimon World Dawn and Dusk
Parasimon is a Machine-species Digimon that digivolves from Datamon.

In the Silver Rank Tournament, Parasimon is one of 3 opponents in the Silver Rank test.

Digimon Masters
Parasimon is a Mega-level Mercenary Digimon that evolves from Arukenimon at level 41, with 6 Evoluters.

Attacks
 * Electric Bind: Binds the opponent with its elongated tentacles and unleashes an intense electric shock.