Agumon X, also known as Agumon (X Antibody) (アグモンＸ抗体 Agumon X kōtai) is a Rookie-level, Vaccine attribute, Dinosaur Digimon. It is a digivolution of Agumon achieved through the X Antibody. It looks almost identical to Agumon but has blue stripes and elongated claws.

It boasts an increased potential to Digivolve into a species of Greymon, which are particularly powerful among Dinosaur-types. The characteristic blue lines that have appeared on its body are reflective of this, a sign that it is no longer to be classified as a Reptile-type, but rather as a Dinosaur-type. Agumon (X Antibody)’s claws are also sharper and deadlier than ever, and its more ferocious personality has given it the ability to perform a new special move, called Baby Burner, which involves charging up Pepper Breath in its mouth until it can release a more powerful blast.