Dark Masters

The Dark Masters (ダークマスターズ Daaku Masutaazu) are four evil, Ultimate level Digimon from Digimon Adventure, who are extensions of Apocalymon. In the absence of the Chosen Children, the Dark Masters took over the Digital World and reformatted much of it into Spiral Mountain, making it easier for them to conquer.

=Members=
 * Metal Seadramon - An arrogant and hot-tempered Digimon in control of the Digital World's seas, he commanded Digimon of the Deep Savers, including many Hangyomon and a particularly scatterbrained Anomalocarimon. He was extremely arrogant about his power, boasting an almost impenetrable defense because of his Chrome Digizoid armor. Unfortunately, he was at a type disadvantage against War Greymon's Dramon Destroyers and was ripped through lengthwise with his Brave Tornado.
 * Pinocchimon - A very juvenile puppet Digimon, he commanded Digimon of the Wind Guardians and controlled the forest. He showed a special interest in Takeru, the youngest of the Chosen Children, challenging him to various games at his mansion. He is best known for toting around a .44 Magnum gun and killing several of his minions during temper tantrums. He was killed by Yamato's Metal Garurumon.
 * Mugendramon - Extremely calculating and uncaring, he ruled over Multitask City and commanded Digimon of the Metal Empire family. He had some of the highest offensive power of the group, being able to obliterate entire city blocks with the cannons on his back. Being a dragon type, he also fell to War Greymon's Dramon Destroyers.
 * Piemon - The leader of the Dark Masters, he watched from the top of Spiral Mountain as his comrades were destroyed by the Chosen Children. He controlled the Nightmare Soldiers, his second-in-command being a Lady Devimon. He was able to shape shift into various forms and cause elaborate illusions, along with the ability to change his opponents into keychains with his versatile Clown Trick. Being too powerful to kill, Takeru's partner, Holy Angemon, sealed him away within his Heaven's Gate. His victims were returned from their keychain state by Holy Angemon's Holy Heal.

=Appearances=

Digimon Adventure: Anode/Cathode Tamer
The Dark Master Mugendramon jogresses with a wild Chimairamon to become Millenniumon. He also revives Piemon to serve him.

Digimon Digital Card Battle
Mugendramon battles you in Infinity Tower's 1st Battle Arena, under Venom Vamdemon. Metal Seadramon and Pinnochimon battle you in Infinity Tower's third Battle Arena, under Piemon. Piemon's deck is centered around three of the four Dark Masters, except Mugendramon.

Digimon Story
Each of the Dark Masters is an obtainable digimon, and are part of each other and Apocalymon's evolution requirements.