Omegamon (dubbed Omnimon in US) is a Mega (究極対) Digimon that appears in several series of Digimon franchise.

Well known as one of the most powerful digimons, Omegamon's two hands depict Wargreymon and Metalgarurumon's heads, and covers himself in a large white cloak.

Omegamon has several appearances in different Digimon animation series:
In Digimon Adventure - Bokura no War Game, Omegamon DNA-evolves (ジョグレス進化 Jogress Evolution) from Wargreymon and Metalgarurumon in a climactic moment of the story.

Omegamon has a brief appearance in Digimon Tamers: The Adventurers Battle.

Omegamon also appears in Digimon Savers as the leader of Royal Knights serving Yggdrasil, known as the god of the Digital World.

In the 3D-CG movie, Digital Monsters X-Evolution, Omegamon is starred as a main character, again as one of the members of the Royal Knights who carry out Yggdrasil's wills.

He also appears in Digimon Xros Wars giving Taiki the XrosLoader and helping him get back to the Digital World.

In Digimon D-cyber manga, Omegamon is one of the 3 Holy knights (Omegamon of Power, Dukemon of Courage, Magnamon of Miracles), the 3 Holy knights are in charge of keeping peace in the Digital world.