Azulongmon

Azulongmon is the Mega form of Triceramon and one of Harmonious Ones.

Digimon Adventure 02
In Kyoto Dragon,

In Dramon Power, Azulongmon appears to give Gennai one of his twelve DigiCores to allow the original DigiDestined's Digimon to digivolve into their Ultimate forms again and for Paildramon to mega digivolve to Imperialdramon.

In Duel of the WarGreymon,

Digimon Adventure tri.
In Loss,

Alternate Forms

 * Triceramon (Mega Form)