Negamon (Adventure:)

Negamon is the main antagonist of the series Digimon Adventure:.

Fiction
Negamon is hiding inside a large back orb in the Network and originally used to exist to bring disasters to make the Digital World evolve from accumulating and learning. The ancient war where led the Army of Darkness to attack the Army of Light was one such disaster.

In August 2020, Negamon starts its plans for a new disaster by dropping a large amount of s into the Network, which hatch into a swarm of Fresh Level and digivolve all the way to the Champion Level. After destroys the Mega Level Argomon and redirects the controlled nuclear missile from hitting Tokyo, Negamon drops another Digi-Egg into the Network, this one hatching into. Negamon's intention to is to power his newest disaster using the data flowing through the Network which contains a great deal of the fear and chaos from within the hearts of humans.

It watches as Omnimon later destroys Eyesmon's Mega form,, and continues the countdown that stopped after Nidhoggmon's death. Negamon then opens a portal which sucks in the and their partner Digimon, with the exception of,  and Omnimon.

Shortly after 's death, Negamon senses the DigiDestined's Crests reacting in the Giant Tree of Information. It sends a swarm of into the  to brainwash Burpmon to eat all the data regarding the Great Catastrophe to prevent to the DigiDestined from learning about it. However, the DigiDestined manage to destroy Burpmon and although the data is scattered, Izzy and Garbagemon set to work on recovering it.

Negamon later sends a group of Argomon to test Tai and in a experiment to test the power of the bond between a DigiDestined and a Partner Digimon. After destroys the other Argomon, the Ultimate Level Argomon states that its master would soon make its move and erase the Digital World from existence through the Great Catastrophe. The Ultimate Argomon then returns to its master in the Network.

After the DigiDestined have discovered the full powers of their Crests, Negamon sends a legion of Soundbirdmon to attack the Giant Tree of Information while the other Soundbirdmon are sent across the Digital World to show the Digimon that the Great Catastrophe is about to begin. During the battle against the DigiDestined, the Soundbirdmon attacking the Giant Tree of Information fuse into Ghoulmon. Ghoulmon is destroyed by and, and Ghoulmon's death also causes all of the other Soundbirdmon to die. But despite that, Negamon is freed from the orb and starts to turn both the Network and the Digital World into a white empty void.

Negamon began sucking the Digital World into its void where all data is obliterated, eventually sucking the DigiDestined in as well. However, they are protected by their Digivices and confronted by the Ultimate Argomon who reveals Negamon's history and true purpose to them. To their horror, Argomon reveals that the data stolen from the Network by the Argomon, Nidhoggmon, and the Zurumon had contained so much inner chaos and fear from human hearts that it had overwritten Negamon's original instinct and corrupted it, making it insatiably hungry and willing to consume everything that exists only for its own satisfaction. As a result, Negamon's new intention is to destroy every existence, not just cause more disasters. Negamon will suck it all into its void where everything will be completely destroyed. The Ultimate Argomon digivolves to Mega to stop the DigiDestined from reaching Negamon, joined by a swarm of Champion Argomon. However, the DigiDestined's partners digivolve to Champion and destroy the Champion Argomon before digivolving to Mega and destroying the Mega Argomon who warns with its last words that it's time for Negamon to consume everything. As the DigiDestined turn their attention ot Negamon, he begins to consume the real world as well.

After breaking the barrier between the Digital and real worlds, Negamon digivolves into Giant Negamon. While the DigiDestined try to destroy Giant Negamon, its real body fuses with the black orb, becoming Abbadomon. Abbadomon is eventually destroyed by and reformats into a Digi-Egg that vanishes in a streak of white light as Omnimon expresses hope that Negamon will be reborn without being bound to either a good or an evil existence. Omnimon then destroys Abbadomon's area of the Network before the children's Digivices restore the destruction that Negamon has caused.

Negamon's Digi-Egg
After being destroyed by, Abbadomon reformats into a Digi-Egg which then vanishes in a streak of white light.

Negamon (Giant)
Negamon (Giant) is the digivolved form of Negamon.

After the destroy the, Negamon breaks the barrier between the real world and the Digital World, and digivolves into Giant Negamon. After, , and  sever the tentacles threatening both worlds, the Giant Negamon starts to emerge from its orb. that is when and  attack and seemingly destroy Giant Negamon's body. But realizes that that they only destroyed Giant Negamon's shell. The Giant Negamon then fuses with the black orb surrounding it, becoming both and.

During the battle between and Abbadomon Core, Abbadomon Core summons a Giant Negamon and fires it at Omnimon, who blocks it with its shield. Omnimon destroys Giant Negamon, though this was just a distraction so Abbadomon Core could shoot a laser at Omnimon in an attempt to kill it. This fails, however, and the battle continues.

In the Digivice: virtual pet, the Giant Negamon is defeated by the DigiDestined's Partner Digimon.

Abbadomon
Abbadomon is the fused form of the Giant Negamon and the black orb. The Giant Negamon also simultaneously digivolved into Abbadomon Core, splitting into two separate Digimon.

After the Giant Negamon's shell body is destroyed by and, the Giant Negamon fuses with the black orb to become both Abbadomon and Abbadomon Core. Abbadomon's tentacles attack, , , , , , and , destroying their physical forms and forcing the four Mega Digimon to revert to their Rookie forms. WarGreymon, MetalGarurumon, Seraphimon and Ophanimon continue their fight against Abbadomon, but Abbadomon nearly destroys, WarGreymon, and MetalGarurumon. Then, people across the real world send their hope of light into the void, restoring the physical forms of the DigiDestined and digivolving their partners back to their Mega forms. They send the energy to, , and , who are rescued from Abbadomon's tentacles by the shades of  and , and send it forward to WarGreymon and MetalGarurumon, allowing them to DNA digivolve into. Omnimon breaks into Abbadomon and flies into the heart of it, ready to end the Great Catastrophe once and for all.

As Omnimon battles Abbadomon Core, Rosemon, Vikemon, HerculesKabuterimon, Phoenixmon, Seraphimon and Ophanimon continue to battle Abbadomon. Abbadomon Core eventually overpowers Omnimon, but the DigiDestined's determination allows him to Slide Evolve into who proves to be more than a match for Abbadomon Core, eventually slicing it in half. The top half turns into a giant purple cloud with a giant fanged mouth that swallows Alter-S, but he blows this form up from the inside and Slide Evolves back into Omnimon. In Abbadomon's white void, Abbadomon shrinks and reformats into a Digi-Egg that vanishes in a streak of white light while Omnimon destroys Abbadomon's area in the Network.

In the Digivice: virtual pet, Abbadomon is defeated by the DigiDestined's Partner Digimon.