Devimon (Adventure)

Lord Devimon was the first major villain to face the DigiDestined, and was responsible for enslaving File Island with his Black Gears, hiding the Tags and Crests, and attacking the children directly and indirectly multiple times.

Devimon could control mysterious artifacts known as the Black Gears, which performed multiple tasks for him. He generally used free gears that, when summoned, would fly towards and eventually collide with a Digimon, bending it to his will and, sometimes, increasing its power and size, especially if the target was struck by multiple gears. There were also some gears that would serve as scrying mirrors to keep watch on the children. Another set of Black Gears were built into giant arrays as the core of File Island itself. When activated, they caused the pieces of File Island to separate or rejoin Infinity Mountain. Although Devimon had a strong control over the Black Gears, at one point it was stated that Devimon didn't create the black gears but mainly found them on File Island.

As demonstrated in his fight with Leomon, Devimon also had the ability to teleport and to enslave Digimon with his own touch, brainwashing and controlling them.

Prior to Digimon Adventure
Before the events of the series, Devimon took control of File Island. At some point he found a prophecy foretelling that the DigiDestined would destroy him, and hid their tags and crests across the continent of Server (presumably because, powerful though he was, he knew he would be unsuccessful in battle against even one Ultimate Level Digimon let alone seven). Although it is never specifically mentioned, it is possible that Devimon received the tags and crests from Piedmon, who had originally stolen them from Gennai before the series began.

Digimon Adventure
When the children first arrived in the digital world, he indirectly attacked them with Black Gear infected Digimon, and puts the renowned rivals Leomon and Ogremon under his thrall. When the children reach the mansion at the top of Infinity Mountain, he creates an illsion to trap the DigiDestined with an amazing dinner and a nice hot bath in a sauna. The illusion made it possible to attack them when they are off-guard, sending Ogremon and Leomon. Then he splits the island, and scatters the children throughout the pieces, and sending more corrupted Digimon after them.

While the children make their way back, it is revealed that he attacked them due to a prophecy stating that the youngest of the chosen children would destroy him. Although they told him they had no knowledge of the prophecy, he only intensified his attacks, and even seemed to assume they had lied to him about their ignorance.

Shortly before the island reformed and the children were reunited, he sent a heavily-infected Leomon to kill T.K. and Patamon, who were to play a large part in the prophecy. Leomon is so strong that the children's Champion Digimon were incapable of harming him, but he is defeated when Izzy shared his discovery that the children's Digivices could purge the corruption.

After this the children, aided by Leomon, climb mount Infinity to defeat him once and for all. In response Devimon absorbs most of the Black Gears himself, and grew into a giant nearly the size of the mountain. With this newfound power he was able to defeat all of the Champion Digimon, including Leomon, but as he was about to kill T.K. believing that he was a threat and would destroy him, Patamon ran to T.K.'s aid and thrust himself in front of the boy to protect him. At that moment Patamon digivolves to Angemon and is able to delete Devimon with a "Hand of Fate" that also resulted in Angemon's deletion. Though Devimon is defeated, he revealed that there were many other evil Digimon just as powerful as he was, and others that are even more powerful. He found joy in the thought that even Angemon would not be able to handle them, as he could not even defeat Devimon without sacrificing himself.

Digimon Adventure 02
In Digimon Adventure 02, Devimon briefly reappeared while the Digimon Emperor searched for the piece he needed to bring Kimeramon to life. When the emperor found the Dark Whirlpool and went down into it to find the piece, he stumbled upon the broken remains of Devimon. The Emperor scoffed at Devimon's taunt-like warning that "the powers of darkness cannot be controlled", and harvested his data for what became the arms and Digi-Core of Kimeramon. However, Devimon's influence caused Kimeramon to rebel against the Emperor, and his voice returned to taunt Ken again until Kimeramon is destroyed.

Attacks:
 * Touch of Evil (Death Claw): Slashes his opponents.
 * Evil Wings (Razor Wing)