Dragomon

Dragomon is a Cameo Character of Digimon Adventure 02. He is Ultimate Digimon.

Digimon Adventure 02
In His Master's Voice, He is the ruler of the mysterious realm known as the Dark Ocean, and was served by the Scubamon who all worship him. Though the Scubamon were enslaved by the Digimon Emperor and attempted to take Kari upon her releasing them, they decided to return to their master. After Kari and T.K. left for their world, Dragomon's shadowed form emerges from the Dark Ocean.

Trivia

 * Dagon's physical appearance is both one of the Great Old Ones from the works of H.P. Lovecraft, and the mythological Umibōzu.
 * Dragomon's name is derived from the mythical deity Dagon.