Triceramon

Triceramon is an Ultimate Level Dinosaur Digimon that resembles the Triceratops. He has the hardest hide than any other Digimon. He is the Digivolved form of Monochromon.

Digimon 02
When Digimon started appearing in the Real World. A Triceramon was seen in the town that Ken Ichijouji live in. Daisuke Motomiya and Raidramon brought down the Control Spire so that Veemon and Wormmon could Digivolve into ExVeemon and Stingmon. When that wasn't enough, they DNA Digivolved into Paildramon and were also attacked by Mummymon. A beam of light from Azulongmon's power that allowed the other Digimon to Digivolve to Ultimate also enabled Paildramon to Digivolve to Imperialdramon and they send Triceramon through the Digi-Port back to the Digital World.