Agumon is a reptile like, rookie level Digimon that was introduced in the first season on the first form of the Digimon Virtual Pet realesed in 1997. He resembles a t-rex part of his name comes from the Japanese onomatopoeia "aguagu", which means bite and the mon is short or monster (all digimon names end in mon). So Agumon is literatly a biting monster. Agumon is seen as the moscot for the series, he has many varients including BlackAgumon, SnowAgumon, ToyAgumon, DotAgumon, ClearAgumon and more. One plays a major role in the 3 seasons of the Digimon Adventure part of the anime.