Greymon is a fictional character from the anime series Digimon Adventure. It is a Champion-level Digimon that primarily resembles a large, bipedal dinosaur with a hard, helmet-like skull. Greymon is known for its immense strength and fiery attacks, particularly its Mega Flame attack. In the series, Greymon serves as the Digivolved form of Agumon, the partner Digimon of the protagonist, Taichi 'Tai' Kamiya. As Tai's companion, Greymon plays a crucial role in battling against evil Digimon and protecting the Digital World from various threats.