GeoGreymon

GeoGreymon is a Dinosaur Digimon. He is the subspecies of Greymon. His name originates from the English geological, having to do with the study of the earth and grey is a misspelling of great.

His appearance is similar to the original Greymon, but has spikes on the sides of his helmet, different markings, has a tensed-up look, and spikes on his arms, with an improved muscle design, including a more defined chest, which lacks the blue stripes of Greymon.

Digimon Next
In a battle against Tankdramon, Tsurugi Tatsuno's Agumon became GeoGreymon for the first time to fight and defeat him.

Digimon World DS
GeoGreymon digivolves from Agumon, and can digivolve further into RizeGreymon depending on its stats.

 Attacks Attacks in Digimon Savers: Another Mission  Variations / Subspecies
 * Mega Flame: A stream of flames are spewed forth from his mouth.
 * Mega Burst: A blast of powerful energy is forcefully ejected from his mouth.
 * Horn Impulse: A powerful, high-speed smash with his horn.
 * Mega Shot: A shockwave attack from his mouth.
 * Mega Roar: A battle cry shockwave attack.
 * Mega Volcano: A stronger version of Agumon's Baby Volcano.
 * Greymon