Apocalymon

Apocalymon is an evil Digimon. He is only seen twice; Once shadowed, and then in a flashback, as he disintegrates. He has the appearance of a large dodechahedron with claws and a humanoid form. He is beyond the Mega level.

When Rika won the Digimon tournament, Apocalymon was one of many Digimon who wanted to be her partner, but she chose Renamon.

Apocalymon intended to destroy the world, but was was destroyed, presumably by Omnimon. However, his data was reformatted into Mephistomon, who serves as antagonist of Battle of Adventurers.

Trivia

 * In the original series, Apocalymon is the final antagonist of Season 1 and the one behind the Dark Masters.
 * His name is derived from the word "apocalypse".