Olegmon the Gold-thief is one of the seven Death Generals in Digimon Xros Wars.

Taiki Kudou, an upbeat seventh-grade boy who always helps people in need, encounters a Digimon named Shoutmon, who brings him and his friends to the Digital World. With his friends Akari Hinomoto and Zenjirou Tsurugi, they form Team Xros Heart to compete against rival teams battling for supremacy, with their ultimate goal of taking down the evil Bagura Empire, who plans to conquer the Digital World.
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(Source: Anime News Network)

Returning to the Digital World, Taiki and Shoutmon learn that the Bagra Army has taken it over and reformatted the world to have Seven Kingdoms, each ruled by a general. <br><br>
(Source: AniDB)