Cerberusmon

Cerberumon
Cerberumon is a Demon Beast Digimon whose name and design are derived from the mythological Cerberus. It is referred to as "Cerberusmon" in American Bandai products. It is called the "Watchdog of Hell". The claws on its feet are hard enough to easily tear through Chrome Digizoid alloys, if they have a low purity. Furthermore, its body is protected by a hard living shell, which has the ability to instantly repair any damage it incurs. The armor on its shoulders each possess sentience, and are able to instantly sense an attack coming from any direction, then report it to Cerberumon's central body.

Digimon Frontier
Cerberumon was the first Digimon encountered under the influence of Cherubimon, whom the DigiDestined in Frontier had to battle. They stumbled upon him after their arrival in the Digital World, when he attacked Fire Terminal and absorbed the Fractal Code for Fire Town while looking for something called a Spirit. During this process he also attacked Bokomon and Neemon who were running towards the children. When Takuya tried to lead Cerberumon away from the others, he found the Spirit of Fire, which gave him the power to become Agunimon for the first time. He then battled Cerberumon, who however had the advantage with the Portals of Darkness attack before being beaten and purified by Agunimon which reverted him to a Digi-Egg. Takuya used his D-Tector to release the Fractal Code which restored the village and the nearby area.

Digimon Data Squad
When Marcus Damon, Thomas H. Norstein, Yoshino "Yoshi" Fujieda, and Homer Yushima were tied to posts in the Holy Capital's Arena, Baromon unleashed Cerberumon on them. Kamemon freed their Digimon whom attacked Cerberumon and freed their partners. Cerberumon dodged Marcus's punch and ran towards Yoshi who fought him bullfighter style. This gave Marcus the opportunity to punch Cerberumon. When Marcus was about to digivolve Agumon to fight Cerberumon, Baromon spared them when he discovered Marcus connections to Spencer Damon.

Digital Monster D-Project
Cerberumon digivolves from Garurumon, and can digivolve further into SaberLeomon.

The Tsunomon in Area 9 will have a Cerberumon in its party when fought post-game.

Attacks
 * Portals of Darkness (Inferno Gate): Opens a "Hell Gate" engraved in the earth, then casts the opponent through it to the jet-black Dark Area.
 * Emerald Blaze/Mad Dog Fire (Hellfire): Spews a red-hot jet of flames.
 * Styx Killer

Variations / Subspecies
 * Cerberumon X

Cerberumon X
Cerberumon X is a Cerberumon who has been affected by the X-Antibody.

 Attacks 
 * Hell Fire
 * Inferno Gate
 * Styx Killer

Variations / Subspecies 
 * Cerberumon