アーマゲモン
An Unidentified [[Digimon]]. It is the result of multiple [[Keramon]] fusing in high quantity. It is said to be a Super Ultimate level Digimon that surpasses [[Diablomon]] by concentrating all its power in its body. Its immense power and extreme potential for destruction and chaos are reflected in its title as "World Breaker" (ワールドブレイカー)

Armagemon is referred to as [b]Armageddemon[/b] in English material.
armagemon