Omnimon is a powerful Digimon beyond the Mega level. He resides in another dimension. However, he cannot leave this dimension. He appeared in the movie Battle of Adventurers.
Omnimon presumably destroyed Apocalymon, whose data was reformatted into Mephistomon. Omnimon fought Mephistomon, who escaped through a portal to Earth. Unable to leave his world, Omnimon teleported Henry, Gargomon, Rika, and Kyubimon to his world and sent them to fight Mephistomon, calling them "Digidestined". Along the way they ran into a MetalTyrannomon, a Pteramon and an Archelomon, and Omnimon easily destroyed them with his sword.
- Supreme Cannon - Shoots a powerful laser
Omnimon also attacks with a sword.