Apocalymon (Adventure)

Apocalymon is the main antagonist of Digimon Adventure. His name is derived from the Apocalypse, or "Revelation", the Biblical text concerning the end of the world. His design is derived from the Biblical demon Legion, a horde of demons possessing one man and acting as one. Apocalymon's arrival was written down in ancient prophecies and the hatred of the Digimon that formed him lingered on. A sadistic and tormented soul, Apocalymon wanted to make the Digital World a living underworld to justify the darkness that composes him. Revealed that his mere existence was responsible for creating the chaos in the Digital World and creating the Dark Masters, Apocalymon debuted as the most powerful enemy to the DigiDestined. After demonstrating his used attacks, he used his "Reverse Digivolve" attack to revert all of the Digimon back into their Rookie forms (Gatomon reverted to Champion instead). He also destroyed their tags and crests and sent the DigiDestined to the Data World. However, once there, the DigiDestined realized that they had the crest power within them all along, and their Digimon were once again able to digivolve. They rematerialized into the Digital World and faced off. After Zudomon, Lillymon, MagnaAngemon, Angewomon, MegaKabuterimon and Garudamon destroyed all of the Death Claws and distracted Apocalymon, WarGreymon and MetalGarurumon destroyed his humanoid form. The DigiDestined thought that they had won; however, as he explained, the humanoid form was only a part of him, albeit an important one. He then attempted to take both worlds down with him with Total Annihilation, his ultimate attack. However, the Digivices of the DigiDestined contained the attack so all it achieved was his death. He is also quoted as being "The ultimate evil, complete with hot and cold running water."

In contrast to the English version, the Japanese version (also in the German and French version) had Apocalymon refer to himself in the plural sense. This is likely a reference to the demon Legion who was also composed of many. Thus Apocalymon, as a being assembled from the data of thousands if not millions of Digimon, may truly have been a plural entity.

Attacks 
 * Darkness Zone: Reverts his enemies to a mass of data.
 * Total Annihilation (Grandis Big Bang): Suicide attack that produces an explosion strong enough to wipe out an entire dimension. Used as a final resort.
 * Reverse Digivolution (Death Evolution): Uses his giant claws to force Digimon to de-digivolve.
 * Virus Grenade: Launches laser grenades at his opponents.
 * Dark Evolution
 * Tentacle Attack
 * Copied attacks: The giant claws morph into specific parts of other evil Digimon and enable Apocalymon to use the attacks of other evil Digimon. He used MetalSeadramon, Myotismon and Machinedramon's attacks to express his inner feelings towards the DigiDestined, while using Devimon's attack to snatch the Digidestined's crests and destroy them.
 * MetalSeadramon's River of Power (MetalSeadramon's Ultimate Stream): His giant claw turns into MetalSeadramon's head to launch a giant laser beam from its nose cannon.
 * Myotismon's Crimson Lightning (Vamdemon's Bloody Stream): His giant claw turns into Myotismon's torso to create a red energy stream that it can throw out like a whip.
 * Machinedramon's Giga Cannon (Mugendramon's Mugen Cannon): His giant claw turns into Machinedramon's torso to release energy blasts from its cannons.
 * Devimon's Death Claw: His giant claw sprouts Devimon arms to grab things. Apocalymon retains the Japanese name of the technique.