DoruGreymon

Dorugremon is Dorumon's Ultimate form. It looks like a red dragon, with fur, a nose horn, 4 black wings with yellow spikes(5 on the front wings, and 3 (correct if that's wrong) on the back) and white mane, paws and belly.

Digivolve chain A (Normal):

Rookie Dorumon Champion Dorugamon Ultimate Dorugremon Mega Dorughoramon

Digivolve chain B (Corrupted): Rookie Death-X-Dorumon Champion Death-X-Dorugamon Ultimate Death-X-Dorugremon Mega Death-X-Dorughoramon War Death-X-mon

Digivolve chain C: Champion Raptordramon Ultimate Grademon Mega & Royal Knight Leader Alphamon