This unique Digimon is believed to be a subspecies of Greymon. Its unknown what caused this, but this alteration has had a profound effect on their fighting capabilities; becoming even more adapt at melee combat through its numerous spikes. Furthermore, their gut can now withstand the intense heat of the Mega Flame, allowing them to stomach the high-temperature flames until they reach their critical pressure, before releasing an ultra-thermal Mega Burst. Furthermore, Horn Impulse is a powerful attack where it destroys the enemy with its large horn.

グレイモンの亜種と推測される特殊なデジモン。頭部の甲殻や体も全身凶器の様に発達し、より攻撃的な姿となっている。必殺技の『メガフレイム』は口から超高熱火炎を吐き出し全てを焼き払う。また、『メガフレイム』を口内で極限まで高め爆発的な威力を持つ『メガバースト』を放つ。さらに、巨大な角で突進して敵を粉砕する『ホーンインパルス』も強力な攻撃である。