Grumblemon (Frontier)

Grumlemon is the Legendary Warrior of Earth, using the power of Anicent Volcamon. An oni digimon, Grumblemon's a proud figure who hates to be bossed around. He has an overconfident personality, and insults his enemies any chance he gets. He was first of the Evil Warriors to surfaced, slide-evolving to Gigasmon. He managed to take Tomoki & Izumi's Spirits.

But when Takuya first became Burning Greymon, Grumblemon lost his beast spirit to Takuya and Tomoki regained his spirit. Grumblemon was eventally defeated by Junpei as Metal Kabuterimon, who scanned his spirit as Izumi regained hers. Grumblemon's human spirit was transfered into Takuya's D-Tector with the beast spirit so Takuya can Hyper-Spirit Evolve to Emperor Greymon.

In Japan, he was named Grottomon.

Abilties
He wears his handmade "Rot Armor" on his person & weilds the 'Grotto Hammer'. He can also dug through solid rock & summon Golemon to his command. As Gigasmon, he's a giant whose skin possesses a firmness that is above ceramics.

Grumblemon
Snake Eye Break: He turns his enemies into stone & uses his hammer to destroy them.

Gigasmon

 * Hurricane Bomber (Quagmire Twister): Spins around like a tornado.
 * Earthquake (Tectonic Slam): Leaps above the ground makes a ground-shaking landing.