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{{Infobox Default
|title=Chaos
|image=[[File:Sonicchannel_chaos.png|200px|alt=Chaos 0]]
|caption=Chaos 0
|RelatedPage1=[https://chao-island.com/info-center/chao-history Chao History]
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|RelatedWiki1=[[Chao]]
|RelatedWiki2=[[Tikal]]
|RelatedWiki3=[[Chaos Chao]]
|RelatedWiki4=[[Master Emerald]]
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|Engine1=
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|FirstSeen=Sonic Adventure
|Species=Chao
}}

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[[Category:Characters]]
[[Category:History]]

'''Chaos''' is a mutated [[Chao]], who possessed high intelligence and abilities that far exceed the others. It is a powerful and mysterious higher being. Although [[Dr. Eggman]] referred to it as "The God of Destruction", it actually has a gentle personality. It profited from the power of seven [[Chaos Emeralds]], situated around the altar of the [[Master Emerald]]. They guaranteed clear water around the altar and protected the inhabitants from any intruders.

==Description==

Chaos is formed of a blue liquid-like substance which it can mould to any shape. Generally, it seems to remained in a full liquid puddle state, and transforming to an humanoid version of itself when needed to. This form is it's most common form, and is the form which is whay [[Chaos Chao]] are based upon. You can see its brain through its transparent head.

==Appearances==
===Sonic Adventure===
In recent times, after unveiling ancient stone tablets describing the destructive water-like beast, [[Dr. Eggman]] shattered the Master Emerald releasing Chaos and persuaded him to help him with his plans for world domination. After Eggman's plans fell through thanks to [[Sonic]] and his friends, Chaos absorbed the negative energies from the Chaos Emeralds becoming Perfect Chaos once more. To fight Perfect Chaos, Sonic absorbed the positive energies of the Chaos Emeralds and transformed into Super Sonic and defeated him. Perfect Chaos transformed back into Chaos and Tikal once again sealed herself away, taking Chaos with her. Neither Chaos nor Tikal have been seen since.

It is revealed during each of the main stories that in the past, Tikal had initially met Chaos under peaceful conditions. She became a friend to the chao and by extension him. However, when she found out about her father [[Pachacamac|Pachacamac's]] plan to steal the emeralds to gain power, she attempted to tell Chaos to flee, but as the guardian of the shrine Chaos could not leave the place. When Pachacamac attacked the shrine, he barged past Tikal and the Chao, enraging Chaos and causing him to harness the emerald's energy to become Perfect Chaos.

[[File:Perfect_chaos.jpg|thumb|200px|alt=Perfect Chaos|Perfect Chaos|upright=0.9|right|Perfect Chaos as seen in Sonic Adventure.]]

===Sonic Adventure 2 Battle===
Chaos is featured in Sonic Adventure 2 Battle versions as a playable character in Multiplayer Treasure Hunting battles. He is slow but has a large radius when it comes to attacking enemies. His description mentions how he is 

[[File:Sa2-chaos0-desc.png|300px]]

===Sonic Battle===
Chaos appears in Sonic Battle during Emerl's story. Knuckles states that Chaos only shows himself in times of great crisis and is guarding the Death Egg. The player must defeat Chaos in order to progress in the story of the game.

===Sonic Generations===
Perfect Chaos appears as the Dreamcast Era boss of Sonic Generations, which has two phases - One where Sonic has to rush through paths to reach Chaos, and one where Sonic has to traverse platforms to reach Perfect Chaos' horn.

[[File:Perfect_chaos_Generations.jpg|thumb|200px|alt=Sonic Generations Perfect Chaos|Perfect Chaos in Sonic Generations|upright=0.9|right|Perfect Chaos as seen in Sonic Generations.]]

===Sonic Forces===
Multiple fake copies of Chaos are present throughout the game as Infinite summons them. 

One notable instance is when Tails is working on fixing E-123 Omega, but is interrupted when Chaos appears out of a manhole. He reaches out to attack Tails with an outstretched arm before being squashed by Classic Sonic.

==Chaos Forms==

{| class="wikitable"
!colspan=3| All forms of Chaos
|-
| Chaos 0 || [[File:Sadx-chaos-0.png|none|200px|alt=Chaos 0|Chaos 0]] || Chaos 0 is the regular form of Chaos with no Chaos Emeralds absorbed. 
|-
| Chaos 1 || [[File:Sadx-chaos-1.png|none|200px|alt=Chaos 1|Chaos 1]] || Chaos 1 is the form of Chaos after absorbing one Chaos Emerald. This occurs after battling the Egg Hornet in Sonic Adventure. The right arm of Chaos grows and you can see the skeleton-like structure through it's transparent body.
|-
| Chaos 2 || [[File:Sadx-chaos-2.png|none|200px|alt=Chaos 2|Chaos 2]] || Chaos 2 is the form of Chaos after absorbing two Chaos Emeralds. Knuckles faces this form of Chaos in the hotel of Station Square in Sonic Adventure. The second emerald gives Chaos 2 growth to the other arm now, making it symmetrical once more.
|-
| Chaos 3 || No image available || Chaos 3 would likely be the form of Chaos after absorbing three Chaos Emeralds. This form is never seen because in Sonic Adventure, Chaos 2 absorbs the next two emeralds at the same time after Sonic And Knuckles fight each other in the Mystic Ruins area.
|-
| Chaos 4 || [[File:Sadx-chaos-4.png|none|200px|alt=Chaos 4|Chaos 4]] || Chaos 4 is the form of Chaos after absorbing four Chaos Emeralds. It i much larger and can extend its reach to attack much larger distances.
|-
| Chaos 5 || No image available || Chaos 5 would likely be the form of Chaos after absorbing five Chaos Emeralds. Like before, Chaos 4 absorbs the next two Chaos Emeralds at the same time on the Egg Carrier in Sonic Adventure, skipping the chance to see what this form looks like.
|-
| Chaos 6 || [[File:Sadx-chaos-6.png|none|200px|alt=Chaos 6|Chaos 6]] || Chaos 6 is the form of Chaos after absorbing six Chaos Emeralds. It again grows in size, and likes to attack using shockwaves and trying to pull enemies inside of its body using its mouth.
|-
| Perfect Chaos || [[File:Sadx-chaos-perfect.png|none|200px|alt=Chaos 3|Chaos 3]] || The ultimate form of Chaos after absorbing all seven Chaos Emeralds. In this form, he is colossal and you even see it erupt through a skyscraper in the Sonic Adventure intro movie. This form was so powerful it required Super Sonic to defeat it.
|}

==Sonic Channel==
Chaos has their own page on [[Sonic Channel]], which is written in Japanese.<ref>[http://sonic.sega.jp/SonicChannel/character/chaos.html Sonic Channel: Chaos]</ref> Full text: 

 「チャオ」の突然変異体。高度な知能とずば抜けた能力を持つ。
  温厚な性格で、かつて七つのエメラルドのパワーを得て祭壇の周囲に清らかな水を保ち、外敵から同族を守護していた。
  しかし、ナックルズの祖先である戦闘民族がカオスエメラルドを強奪しようとして仲間のチャオを犠牲にしたとき、怒ったカオスは7つのエメラルドを取り込んでパーフェクトカオスに変化し暴走。大洪水を起こし世界を滅ぼさんとした。
  ティカルの祈りにより、その意識と共にカオスはマスターエメラルドの中に封印される。七つのエメラルドは行方不明になり、混沌を呼ぶ石「カオスエメラルド」と称されるようになるのだった。

Translation:
  A mutated Chao. Possessing high intelligence and abilities that far exceed those of the rest. A gentle personality; once profiting from the power of the seven Chaos Emeralds, which guaranteed clear water around the altar and protected its race from foreign tribes. However, Knuckles' ancestors were a war-like people and slaughtered many of [Chaos'] fellow Chao in order to plunder the Chaos Emeralds, causing the enraged Chaos to go berserk, absorbing the 7 Chaos Emeralds and transforming into Perfect Chaos. The resultant heavy floods destroyed the civilisation.
  Tikal, by means of a prayer, linked her consciousness with Chaos and they were sealed in the Master Emerald. As for the 7 Emeralds, they were unaccounted for, but it was at that point that the stones came to be called "Chaos Emeralds".

==Sonic Chronicles: Codex==
Chaos has an entry in the [[Sonic_Chronicles:_The_Dark_Brotherhood|Sonic Chronicles]] Codex, under ''Perfect Chaos''.

  Perfect Chaos is a powerful and mysterious higher being, which Eggman refers
  to as the "god of destruction". Perfect Chaos is actually only the most recent
  form of the being, taken by Chaos after it absorbed the negative energies of
  all seven Chaos Emeralds.
  
  Summoned by Pachacamac's attempt to steal the Master Emerald, Chaos attacked
  the echidnas and nearly wiped them all out. A peaceful echidna named Tikal,
  Pachacamac's daughter, soothed Chaos and managed to seal it, along with 
  herself, inside the Master Emerald. The energy surge threw Angel Island into
  the air, causing it to hover over the land now known as Mystic Ruins.
  
  Later, Eggman released Chaos from the Master Emerald to help him in his plans
  for world domination. While Eggman's plans fell through thanks to Sonic and
  his friends, Chaos decided to take the Chaos Emeralds for himself. Chaos
  absorbed the negative energies from the Chaos Emeralds, becoming Perfect Chaos
  once more. To fight Perfect Chaos, Sonic absorbed the positive energies of the
  Chaos Emeralds and transformed into Super Sonic to defeat the powerful god.
  Defeated, Perfect Chaos transformed back into Chaos once more, and Tikal
  appeared to take Chaos away in a blinding flash of light.
  
  Neither Perfect Chaos nor Tikal have been seen since.

<gallery caption="Sonic Chronicles Codex" widths="180px" heights="120px" >
File:ChroniclesPerfectChaos1.png|Page 1
File:ChroniclesPerfectChaos2.png|Page 2
File:ChroniclesPerfectChaos3.png|Page 3
File:ChroniclesPerfectChaos4.png|Page 4
</gallery>

==Trivia==
* In the original Japanese cut scenes of Sonic Adventure, Chaos makes Chao sounds when transforming - the only mention of him being related to the Chao in-game. It was removed in later versions.<ref>[https://www.youtube.com/watch?v=2K30xVEdmXM All Tikal Sonic Adventure Scenes (Youtube)]</ref>
* The predecessor of the Sega Dreamcast was the Sega Saturn, which was known to not be able to handle transparency very well, if at all. Being a Dreamcast launch Game, Sega made sure to show off the capabilities of the Dreamcast hardware with a fully transparent Chaos as a main character.

==Music==
Chaos 0/2/4 boss fight music from SA1:
[[File:SA1-music-chaos024.mp3]]

Chaos 6 boss fight music from SA1:
[[File:SA1-music-chaos6.mp3]]

==Gallery==

<gallery caption="Official Artwork" widths="180px" heights="120px" >
File:Sonicchannel_chaos.png|Sonic Channel
File:Sonic Channel 2023 03 calendar.png|Sonic Channel
File:Sadx-chaos-0.png|Sonic Adventure 
File:Sadx-chaos-perfect.png|Sonic Adventure
File:Chaos_runners.png|Sonic Runners
</gallery>