Regulusmon

Regulusmon is an Evil Dragon Digimon of the Ultimate level in the Digimon franchise. It strongly resembles Canoweissmon, but is jet-black, possesses four wings, and is adorned with purple glowing stripes. It carries a shield on its left arm. It is said to be as powerful as Megidramon, one of the Four Great Dragons, and is the source of the "GRB contagion," which causes infected Digimon to become violent and berserk. Regulusmon is cruel and desires to rule all, using fear to achieve its goals. In battle, it is cunning, treacherous, aggressive, and brutal, showing no regard for others. In Digimon Ghost Game, GulusGammamon can digivolve into Regulusmon, which is an alternative Ultimate form of Amanokawa Hiro's partner Digimon, Gammamon.