Valkyrimon

Valkyrimon is the mega form of the Digimon from the series Digimon 02. Valkyrimon, however, does not appear in the series. This digimon is named after a valkyrie, despite being male. More info here:

http://www.thedigitalfantasy.com/digitalempire/digidex/dex-v/Valkyrimon.html