AncientMegatheriumon

AncientMegatheriumon, a fictional character from the Digimon Frontier series, is an Ancient Beast Digimon with the power over ice. He was one of the Ten Ancient Warriors that saved the ancient Digital World from Lucemon's treachery. The size of a small mountain, he dominates the absolute zero, intensely cold frozen lands. The power AncientMegathriumon possessed now lives on in Tommy, who wields the Spirits of Ice created by AncientMegatheriumon.

Digivolution

 * Rookie (Child) - Kumamon
 * Champion (Adult) - Korikakumon
 * Ultimate - Daipenmon
 * Mega (Ultimate) - AncientMegatheriumon'

Attacks

 * Great Snow Blow: Uses his hard fur to attack his enemy.
 * Freezing Blizzard: Create a snowstorm that can completely freeze everything.

Digimon Frontier
He was involved with the other Ancient Warriors in defeating Lucemon.