Chaos (Sonic X)

Chaos (カオス) is character in the anime series Sonic X and its comic series published by Archie Comics. It is an immortal and ancient creature from Sonic's world that is composed entirely of concentrated, water-like chaos energy. It has the ability to change form for each Chaos Emerald it receives.

The original guardian of the Chaos Emeralds and the Master Emerald, Chaos watched over a Chao colony in ancient times until an attack from the Knuckles Clan led to it being consumed by a fury threatened to destroy the world. However, it was sealed in the Master Emerald before it could succeed. After generations of imprisonment, it was released by Dr. Eggman in a plot to conquer the world. Eventually, Chaos went rogue and tried to destroy the Earth, but was calmed by Sonic and became a force for good.

Appearance
Chaos is a liquid lifeform made of water-like chaos energy. The forms it can take are many, although its most recognizable form is its Chaos 0 state. In this state, Chaos possesses a humanoid form with disproportionally long arms and legs compared to its torso. It has thick forearms with three large fingers on each hand, a short stump for a tail, and long feet with two large toes each. It also has two fin-like protrusions on the back of its head, sharp flaps on each side of its head, and a tall bulge on top of its head. It also possesses no facial features, except for two pupil-less limegreen eyes. Lastly, it has a round pink brain inside its transparent head, with a brain stem on the bottom.

Past
Thousands of years ago, Chaos lived at the Altar of the Emeralds where it served as the protector of the local Chao, the seven Chaos Emeralds, and the Master Emerald that resided there. At some point, it befriended Tikal, the daughter of the chief of the Knuckles Clan.

One day, Tikal came to Chaos and asked it to leave the altar, as her father, Chief Pachacamac, planned to attack the altar and steal Chaos' Chaos Emeralds. Chaos, however, told Tikal that it could not leave the altar. When Pachacamac and his followers finally attacked the altar, they harmed the Chao and Tikal. Chaos, enraged by seeing his friends hurt, transformed into a terrifying monster called Perfect Chaos which killed all of them and was imprisoned in the Master Emerald by Tikal before his rage could wreck more havoc.

Chaos Saga
Six months after the Master Emerald arrived on Earth, Chaos was freed from the Master Emerald when Dr. Eggman, who sought to harness Chaos' power to conquer Earth, destroyed the massive gem. Upon its release, it was attacked by the Master Emerald's guardian, Knuckles, but Chaos easily repelled him and escaped. However, the shattering of the Master Emerald caused Chaos' tail to land elsewhere, and it ended by being swallowed by Froggy. Some time after, Chaos became the minion of Dr. Eggman, who began hunting the Chaos Emeralds to power Chaos up further.

Chaos eventually emerged in Station Square and began destroying everything in sight. Not even the police was able to stop its rampage. However, Chaos withdrew after Sonic showed up and gave it a beating. It returned though when Eggman showed up and stole a Chaos Emerald from Cream, which he then gave to Chaos, causing it to evolve into Chaos 1. Chaos tried to attack Sonic and his friends, but got interrupted by Knuckles, who wanted payback for what Eggman did to the Master Emerald. Chaos was subsequently fed another Chaos Emerald by Eggman, and evolved into Chaos 2. Engaging Sonic and Knuckles, Chaos initially had the upper hand and managed to destroy much of the city, but was ultimately brought down by Sonic and Knuckles' teamwork. Dr. Eggman then abducted Chaos' components into his Egg Mobile and fled from the scene.

Coming with Eggman to Windy Valley, Chaos snatched the two Chaos Emeralds Sonic and Tails had found when they fell into its possession, causing it to evolve into Chaos 4. Chaos proceeded to fight Sonic, but was defeated by the hedgehog yet again despite being in its right element. Its remains was then picked by Eggman and taken to the Egg Carrier. On the massive aircraft, Chaos and Eggman caught Chris and Big in trying to escape with Froggy, whom Eggman had captured for Chaos. On Eggman's orders, Chaos cut the two heroes off when they tried to flee. Taking Froggy, Eggman made it spit out the Chaos Emerald it had swallowed, which he then gave to Chaos, along with another one he had gotten earlier. With that, Chaos evolved into Chaos 6, whom Eggman then fed Froggy to so it could reabsorb the part of its essence that Froggy had swallowed. When Big and Chris tried to save Froggy, Chaos swallowed them as well. In the process, Chaos 6 regained its tail from Froggy. Sonic soon after came to the rescue, but was unable to pierce Chaos' skin. Chaos proceeded to beat Sonic with its tentacles until Knuckles intervened. Chaos then faced the combined forces of Sonic and Knuckles again, who managed to defeat it by attacking its weak point (its brain). In the aftermath, Knuckles took the Chaos Emeralds from Chaos' remains.

In episode 31, Chaos attacked Eggman and then absorbed the White Chaos Emerald in the following episode, becoming Perfect Chaos. Chaos then destroyed and flooded Station Square, scattered all the Chaos Emeralds in numerous directions, drained of their negative power but they were gathered by Amy, Cream, Chris, Big, Knuckles and Eggman. Sonic harnessed their positive energies to become Super Sonic and defeated Perfect Chaos. After he returned to Chaos 0, Tikal took him home.

Archie Comics
Chaos and Tikal were later summoned back to Earth by the Master Emerald-along with a considerable number of Chao to battle with a number of Dark Chao created by Dr. Eggman. Alongside Sonic and their other friends, they managed to defeat the evil doctor's army. Chaos then utilized the positive power of the seven Chaos Emeralds to battle one of the doctor's Egg-Gantor, which he successfully defeated. When Eggman was defeated, he returned to his time with Tikal and the Chao.

Chaos then reappeared in issues #28 and #29. By the end of issue #28, Eggman had collected the seven Chaos Emeralds. Thanks to his Greenbots, he used the Master Emerald and the Chaos Emeralds to recreate Perfect Chaos. Eggman's Greenbots formed themselves in Perfect Chaos' chest, turning it into Chaosbot so that Eggman would have control over Perfect Chaos. Eggman used Chaosbot to attack Station Square again. Sonic reminded Chaos to fight his control, at which Chaos remembered his life with the Chao. He spat out the Chaos Emeralds and gave them to Sonic. Sonic used the Chaos Emeralds to become Super Sonic, but was no match for Chaosbot, who now also had the powers of Chaos Control and was under Eggman's power. After destroying Eggman's controller that controlled the Greenbots, Perfect Chaos attacked him. Super Sonic blasted through the Greenbots, destroying them. Chaos returned to Angel Island and went back into the Master Emerald.

Chaos 0
Chaos 0 was Chaos' true form. He used it to destroy Tikal's father, and also in Station Square until Eggman fed him the Yellow Chaos Emerald, transforming him into Chaos 1. He later took this form again when Perfect Chaos was defeated and he regained his sanity.

Chaos 1
Chaos 1 was the first form Chaos took. He fought Sonic and Knuckles until Eggman fed him the Red Chaos Emerald, transforming him into Chaos 2.

Chaos 2
This was the second form Chaos took, until Sonic and Knuckles defeated him. Eggman then recalled him. He later absorbed the Cyan and Green Chaos Emeralds, transforming into Chaos 4.

Chaos 4
Chaos took this form when Tails dropped the Green and Cyan Chaos Emeralds, becoming Chaos 4. He then battled Tails and Sonic but Sonic triumphed victorious again, forcing Eggman to recall him and make their escape. He later absorbed the Purple and Blue Chaos Emeralds at the Egg Carrier, becoming Chaos 6.

Chaos 6
This was the fourth form Chaos took, when he absorbed the Purple and Blue Chaos Emeralds. He nearly defeated Sonic and trapped Big, Froggy and Chris, until Knuckles came by and helped Sonic destroyed Chaos 6's brain and defeated him. However, he survived and later attacked Dr. Eggman, taking the White Chaos Emerald and becoming Perfect Chaos.

Perfect Chaos
Perfect Chaos was Chaos' final and strongest form, which it used to flood Station Square. He discarded all of the Chaos Emeralds and were gathered by Sonic's friends, and their friendship helped restore the Emeralds' power. This allowed Sonic to become Super Sonic and defeat Perfect Chaos, returning him to Chaos 0.

Chaosbot
Chaosbot is an alternate form of Perfect Chaos in the Sonic X comic series published by Archie Comics. Eggman forced Chaos to take this form by combining Perfect Chaos with his "Greenbots", allowing Eggman to control him. Chaosbot is more powerful than Perfect Chaos due to Eggman's robots and his usage of Chaos Control.

Positive Super Form
Featured only in the comics, this form of Chaos utilized all seven Chaos Emeralds just like Perfect Chaos, but used their positive energy rather than the negative. In this form, Chaos retained the body of its Chaos 0 state, but it grew several times larger, rivaling nearby buildings for height. It was also incredibly strong, able to knock off the head of Eggman's Egg-Gantor. The seven Chaos Emeralds were visible on its brow, forming a circle just above its eyes.