EmperorGreymon is one of the main heroes and the Unified form of Agunimon. His known attacks are Dragonfire Crossbow and Pyro Dragons
He is voiced by Michael Reisz & Dave Wittenburg.
He looks similar to WarGreymon from Digimon Adventure.
EmperorGreymon appears for the first time in the episode "The real Kerpymon". After the defeat reported by Aldamon and Beowolfmon in the fight with Kerpymon, Ophanimon, before dying, strengthens with the last drop of his powers the Digivice of Takuya and Koji to provide them with the necessary strength to fight against the Angelic Digimon. The Digiprescelti are therefore urged to concentrate all their Digispirit in Takuya and Koji, so as to obtain only two Legendary Warriors but infinitely powerful. Takuya then obtains the Earth's Digispirit acquired from Grumblemon and those from Wood once in possession of Arbormon, in addition to those of Zoe's Wind and Tommy's Ice. He performs the Spirit hyperdigital evolution in EmperorGreymon, while Koji becomes MagnaGarurumon. The two face and defeat Kerpymon, also collapsing his castle.
However, Kerpymon is not yet beaten and returns to attack the Digiprescelti after having absorbed most of Digiworld Digicodes. Despite this, EmperorGreymon and MagnaGarurumon elaborate a winning plan and it is the owner of the Fire to inflict the coup de grace to the Angelic Digimon thanks to the protection offered by MagnaGarurumon. From that point on, and for the duration of the battle against the Royal Knights, EmperorGreymon will become the most used form by Takuya.