4 Vicious Dark Masters In Digimon Adventure

The Dark Masters are a group of four Mega-level Digimon created by Apocalymon who have banded together to conquer the Digital World. The group was led by Piedmon. They consist of:

MetalSeadramon (Mega)

MetalSeadramon is an Android Digimon. It is the final form of the Seadramon-species whose whole body is covered in the strongest metal, Chrondigizoit alloy. Its Metal Body reflects every attack. Furthermore, it has the fastest speed of movement among aquatic Digimon. MetalSeadramon was remodeled as a Digimon for use in interception under the sea. Through this, it was completed as a Digimon for use in land, sea, and sky interception.
Attacks
River of Power: Fires an energy cannon from its snout.
Hot Squeeze: Powerfully constricts its enemy in its coils.
Poseidon's Divide: Summons up a tsunami and directs it at the foe.
Shimetsuke: Squeezes an enemy with its body.

Puppetmon (Mega)

Puppetmon is a Puppet Digimon. It was built from the body of a cursed Cherrymon, and it is thought that it was probably constructed from Cherrymon's data by a single fiendish hacker. It has an appearance like a marionette, but it can move under its own volition. Its personality is detestable, as it tells fibs, and when a computer presents false information, it is the work of Puppetmon.
Attacks
Puppet Pummel: Packs gunpowder into its revolver-style hammer, then strikes with its strongest technique. This attack will cause the opponent to vanish without a trace, not just from the hammer's blow but also from the explosion of the gunpowder.
Flying Cross Cutter: Throws the wooden cross on its back like a sharp boomerang.
Lie: Tells multiple lies to make its nose grow and hit the opponent with it.
Drill Nose: Spins its metallic nose like a drill.

Machinedramon (Mega)

Machinedramon is a Machine Digimon. With its whole body in 100% full metal, it is the Digital World's strongest Digimon. It was built by synthesizing the parts of many Cyborg Digimon, and it is thought that all of the Cyborg Digimon produced so far were merely prototypes for the completion of Machinedramon. Its power is at a level that would overwhelm other Digimon, and it possesses an intellect which boasts incomparable throughput, but it is a purely mechanical Digimon which does not share their self-will. Instead, someone planted a program containing evil intentions within the DigiCore at the center of its body, and Machinedramon is supplied with infinite power from that malice-filled DigiCore.
Attacks
Giga Cannon: Fires superdreadnought-class energy waves from its two cannons.
Dragon Fire: Drills its right arm into the opponent.
Catastrophe Day: Detonates itself in a large explosion.
Infinite Hand: Launches a blast of energy from its hand.

Piedmon (Mega)

Piedmon is a Wizard Digimon. It is a strange-looking and elusive Digimon that is completely shrouded in mystery. Demon Man Digimon have many mysterious qualities, and since Demon- and Undead-species are basically beings from another dimension, their true identities are totally misunderstood. It is unclear why Piedmon appeared and what the purpose of its existence is, and there are currently no means of clarifying these questions. However, since its strength is without equal, if you happen to stumble across Piedmon, you probably won't be able to do anything but curse your fate. It has four swords pierced through the "Magic Box" on its back.
Attacks
Trump Sword: Teleports its four swords, causing them to skewer the opponent in the following instant.
Clown Trick: Does various magical effects including transformations, disguises, or reflecting an opponent's attack back.
Masks Square: Creates a field in which all communications can be read by it and allows it to teleport itself and its attacks anywhere at will.
Toy Wonderness: Creates a gust of wind.
Ending Snipe: Unleashes electricity from both hands and electrocutes opponents.