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Villain Overview

You know nothing, fool! It's Chaos, the God of Destruction!
~ Dr. Eggman introducing Chaos to Sonic.

Chaos is a major antagonist in the Sonic the Hedgehog franchise.

He appears as the unseen overarching antagonist of Sonic the Hedgehog 3 & Knuckles, the main antagonist of Sonic Adventure, a supporting protagonist in Sonic Battle, a minor antagonist in Sonic Generations, the posthumous overarching antagonist of Sonic Chronicles: The Dark Brotherhood, the final antagonist of The Lego Dimensions Level Pack: Sonic Dimensions, and a posthumous character in subsequent installments.

He is a powerful water-based creature and a good friend of Tikal, and was once the guardian of the Chaos and Master Emerald until Chief Pachacamac's actions drove him to madness.



Chaos was once a regular Chao, but somehow became mutated by the power of the Master Emerald. Since then, he used his new powers to protect the Master Emerald shrine, as well as the Chaos Emeralds and the other Chao inhabiting it. He also guaranteed the clean water surrounding the altar.

Around four-thousand years ago, Tikal, a young girl from the still-thriving Knuckles Clan, discovered the shrine and became friends with the local Chao with her gentle nature. Upon which, Chaos revealed himself to Tikal and shows his trust by allowing her to approach the shrine, where she discovered the Master Emerald and Chaos Emeralds and recognized them from her grandmother's prayer. Sometime later, Tikal returns to the shrine to warn Chaos that her warmongering father, Chief Pachacamac, planned to raid the altar and take the Chaos and Master Emeralds by force so that they can destroy all their enemies, and tells him that he must evacuate everyone present. When she learns that he is bound to the shrine and thus unable to leave, Tikal promises to talk with her father again in hopes of changing his mind.

Unfortunately, her attempt fails as Pachacamac and several of his warriors approach the shrine with the intent of taking the emeralds. Despite her father's demands to move aside, both Tikal and the Chao stand their ground, and so Pachacamac orders his men to charge through them, injuring them. Enraged at seeing those he loved hurt, Chaos appears before Pachacamac just as the chief approached the Master Emerald. He then absorbs the negative energy of the Chaos Emeralds to become Perfect Chaos, destroying the chief and his soldiers. Consumed by its own power, Perfect Chaos then lays waste to the Knuckles Clan, and threatened to do the same with the rest of the world. In order to stop this rampage, the still-injured Tikal goes to the Master Emerald and uses her prayer to seal both Chaos and herself inside of it. The resulting event caused a large section of land to levitate into the sky, thus becoming Angel Island. The surviving members of the Knuckles Clan then vowed to never let the same tragedy occur again by forever protecting the Master Emerald from any who would attempt to steal it.

In the present day, Knuckles, the last surviving member of the Knuckles Clan and possibly the Echidna race, was placed in charge of guarding the Master Emerald on Angel Island. He never knew why, but regardless he knew it was his duty. Since then, he has protected it from thieves like Dr. Eggman with his immense strength as well as the help of other heroes like Sonic the Hedgehog and Tails the Fox.

Sonic Adventure/Sonic Adventure DX: Director's Cut

One night, while dozing off, Knuckles awoke to the sight of a shattered Emerald, and a strange being, Chaos standing in front of him. Chaos got away, and Knuckles started his quest to repair the Master Emerald. Dr. Eggman was able to find Chaos, and made him his servant. As the story goes on, Eggman keeps feeding Chaos more and more Emeralds, until Sonic makes it onto Eggman's flying fortress, the Egg Carrier, and defeat Chaos, with Knuckles subsequently fighting and finishing him off right afterwards, knocking out the six Emeralds he had at that point. The Egg Carrier crashes, and Knuckles holds on to the Emeralds, thus ending the main story.

Knuckles takes back all of the Emerald Shards, and the six Chaos Emeralds back to Angel Island, sending it back into the sky. As Eggman plots his revenge, Chaos finds and attacks him. Eggman flies to Angel Island to get Knuckles' help, but Chaos followed him and made quick work out of both of them. Sonic goes to see what is happening, and Knuckles tells him about Chaos' return. Sonic and Tails look for the final Chaos Emerald in the Tornado, but Chaos gets to it before them.

Using the power of the seven Emeralds, as he did thousands of years ago, he becomes Perfect Chaos. He floods the city of Station Square, and destroys everything in his path. Eggman, enraged that Chaos betrayed him, tries to use a new Egg Carrier to defeat him, but with a single blast Chaos rips the ship in two. Just when all seems lost, Tikal shows herself to Sonic, and tells him that they have to seal Chaos away before he could do any more damage. Sonic refuses, saying that if he is still angry it will just happen again. So, Sonic's friends gather the Emeralds, and Tails tells Sonic that Chaos only used the negative powers of the Emeralds, and that Sonic can still use the positive powers they possess. After this speech, the Emeralds have their colors returned, and Sonic becomes Super Sonic.

After Chaos is defeated, he calms down, and returns to his more friendly nature he had before the shrine was attacked. Pleased, Tikal thanks Sonic, and she and Chaos rise into the sky, disappearing without a trace.

Sonic Generations

He reappears only as Perfect Chaos in the Station Square as the second boss in the Console and PC versions of Sonic Adventure. He starts to go on a rampage. Luckily, Sonic did not need to use the Chaos Emeralds to become Super Sonic and defeat Perfect Chaos. Sonic rushes and speeds up to Perfect Chaos' body, hitting his brain several times. After that, Perfect Chaos was defeated and sunk back into the water.

Sonic Forces

Chaos as seen in Sonic Forces.

A duplicate of Chaos appears in Sonic Forces as a minor antagonist. He is one of Dr. Eggman's minions paired alongside copies of Metal Sonic, Shadow, and Zavok that answer to the enigmatic villain Infinite on Eggman's behalf after the Eggman Empire conquered most of the world. Chaos tried to kill Tails while he was repairing Omega, only to be defeated by Sonic's younger self, Classic Sonic. Eventually, after Infinite and Eggman are defeated, the clones of Metal Sonic, Chaos, Shadow, and Zavok vanished, leaving the Resistance victorious in the battle for reclaiming the world.

Other Media

Sonic X

Chaos becomes the main villain in the Chaos Saga in the Sonic X anime. Much like Sonic Adventure, Chaos was released by Dr. Eggman and gets stronger with each Chaos Emerald he obtains. Chaos also takes on the same forms as the video versions such as Chaos 0, Chaos 1, Chaos 2, Chaos 4, Chaos 6, and Perfect Chaos. Much like his video game counterpart, the anime Chaos was defeated by Super Sonic.

Sonic Chronicles: The Dark Brotherhood

Although Chaos does not appear in the game and is only mentioned, he played a significant part in the backstory. Because Chaos destroyed the Knuckles Clan, it allowed their rivals, the Nocturnus Clan, to reign supreme in the ancient world before their civilization was pulled into the Twilight Cage.

Mario & Sonic at the Winter Olympic Games

An ice version of Perfect Chaos appears as an obstacle during Sonic's version of Dream Figure Skating. The only difference is that it was not actually hurting anyone and was mainly just there to be a part of the show.

Lego Dimensions

Chaos appears as the final boss in the Sonic the Hedgehog Level Pack of LEGO Dimensions, where a giant Chaos 0 attacks the Death Egg seeking the stolen Chaos Emeralds. It fought against Sonic until Sonic could turn into Super Sonic and defeat the monster.

Super Smash Bros.

Super Smash Bros. Brawl

Chaos appears as a sticker that can be equipped by any character. When equipped, he slightly increases the amount of health recovered when eating food.

Super Smash Bros. Ultimate

Chaos appears as a primary grab-type spirit that increases water attacks. His spirit battle is against a Metal Inkling on the Battlefield form of Fourside that grows to giant size when at critical damage.


Chaos 0

Chaos 0

Chaos 0 is Chaos' first form. It is missing its tail (which had been swallowed along with a Chaos Emerald by Froggy), and possesses no Chaos Emeralds. This form of Chaos is considerably vulnerable despite its all-water composition, and can be defeated by striking its exposed brain. This form is fought only by Sonic at the beginning of his story.

Chaos 1

Chaos 1

Chaos with one Chaos Emerald. This form only features minor changes from the first form. Chaos' head becomes broader and his right arm becomes bulkier, developing a rigid endoskeleton (with the Chaos Emerald at the center of the "hand") and pincer-like fingers. This form is never fought, but seen after Sonic or Tails defeats Eggman the first time and by Knuckles in the hotel before transforming into Chaos 2.

Chaos 2

Chaos 2

Chaos' third form with two Chaos Emeralds is identical to Chaos 1, but now both arms are bulky and have exoskeletons. This form is only fought in Knuckles' story, in the hotel.

Chaos 4

Chaos 4

With four Emeralds, Chaos takes on a hunched dolphin-like form with a bony tail and fin-like protrusions in addition to his arms. He is found in the Mystic Ruins and can be fought by Sonic, Tails, or Knuckles.

Chaos 6

Chaos 6

With six Chaos Emeralds, Chaos undergoes a much more dramatic change. In addition to becoming larger, Chaos becomes arachnid-like with several eyes and tendrils, a mouth, and regains his true tail from Froggy. In this form, Chaos also moves his brain to the center of his body, making him considerably harder to damage. He is fought on the Egg Carrier, and can be fought by Sonic, Big, or Knuckles.

Perfect Chaos

Perfect Chaos

After absorbing negative energy from all seven Emeralds, Chaos 0 takes on an immense reptilian form, and gains several new powers. In this form, Perfect Chaos can control far more water than before, and can create water tornadoes and fire lasers. This form was so powerful that he nearly managed to kill all the echidnas on Angel Island and flooded Station Square, leaving it in ruins. The form could only be stopped by the power of Super Sonic, using the positive energy from the Chaos Emeralds against the titan. This form is also fought as the fourth boss of Sonic Generations, fighting Modern Sonic instead of Super Sonic.



  • Tikal
  • Chao
  • Dr. Eggman (formerly)
  • Badniks (formerly)
  • E-Series Robots (formerly)
  • Sonic
  • Tails
  • Knuckles
  • Amy
  • Big
  • Rouge
  • Cream


  • Knuckles Clan
  • Pachacamac
  • Dr. Eggman
  • Badniks
  • E-Series Robots
  • Sonic (formerly
  • Tails (formerly)
  • Knuckles (formerly)
  • Amy (formerly)
  • Big (formerly)
  • Gizoids
  • Nocturnus Clan


Vocal Samples

Theme Samples


  • Perfect Chaos resembles Biollante from the Godzilla franchise.
  • Perfect Chaos is the manifestation of the negative power of the Chaos Emeralds.
  • What forms Chaos take with three or five Chaos Emeralds are uncertain for they were never shown anywhere in the differing Sonic continuities.
  • It is unknown where he and Tikal went to after the events of Sonic Adventure.
  • Despite being advertised as a major antagonist, Chaos' role in Sonic Forces is very minimal. He is briefly shown in two cutscenes, and does not make a return until the climatic end of the story. Fans were disappointed to find out that Chaos did not even have his own boss battle.
  • In Sonic Adventure, Chaos appears in five of the seven stories, serving as the main antagonist of Knuckles and Big's story and the Last Story, the secondary antagonist of Sonic and Tails' stories and an unseen antagonist of Amy and Gamma's stories.


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Eggman Empire
Dr. Ivo "Eggman" Robotnik | Metal Sonic | Orbot (prototype) | Cubot | EggRobos | Lone EggRobo | Mecha Sonic | Silver Sonic | Mecha Knuckles | Badniks | Tails Doll | E-100 Alpha | E-101 Beta | Eggman Enterprises | MeteorTech | SCR-HD | Time Eater | Jackal Squad (Infinite) | Replicas

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Shadow the Hedgehog | Rouge the Bat | E-123 Omega

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Jet the Hawk | Wave the Swallow | Storm the Albatross

Eggman Nega's Forces
Eggman Nega | Metal Sonic 3.0

Deadly Six
Zavok | Zazz | Zeena | Master Zik | Zomom | Zor

Black Arms
Black Doom | Eclipse the Darkling

Mephiles the Dark | Iblis (Iblis's Minions)

Nocturnus Clan
Imperator Ix

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Great Battle Kukku | Battle Kukku XVI | Dr. Fukurokov

Bearenger the Bear | Fockewulf the Wolf | Carrotia the Rabbit | Witchcart

Dr. Eggman | Hard-Boiled Heavies (Heavy King, Heavy Magician) | Metal Sonic

Sonic Boom
Charlie | D-Fekt | Dave the Intern | Dr. Eggman | Lyric the Last Ancient | Mark the Tapir | Metal Sonic | Morpho | Nominatus | Shadow the Hedgehog | Swifty the Shrew

Dr. Robotnik | Agent Stone | Echidna Tribe (Pachacamac) | Scavengers | Lindsey and Jason

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Ansem | Billy Kane | Chang Koehan | Choi Bounge | Dr. Coyle | Dragonborn | Master Xehanort | Ryuji Yamazaki | Saïx | Solon | Spiders | Springtron | Team Rocket Grunts | Vanitas | Xemnas | Yiga Foot Soldiers

           Legodimensions logo.png Villains

Bad Guys
Agent Smith | Anacondrai Cultists | Bad Cop | Badniks | Bane (LEGO Batman) | Bane (The LEGO Batman Movie) | Beetlejuice | Bellatrix Lestrange | Billy Numerous | Brain Gremlin | Brainiac | Candy Zombies | Chaos | Cave Johnson | Clayface | Clouse | Credence Barebone | Cybermen | Daffy | Daleks | Dalek Emperor | Death | Death Eaters | Dementors | Demons | Dr. Ivo "Eggman" Robotnik | Draco Malfoy | Earl of Lemongrab | Fern | Flying Monkeys | Forest Blackwell | General Zod | Ghosts (Gauntlet) | Ghosts (Ghost Busters) | Ghosts (Ninjago) | GLaDOS | Gnarlak | Gollum | Goons | Gremlins | Harley Quinn (LEGO Batman) | Harley Quinn (The LEGO Batman Movie) | Ice King | Indominus rex | Joker (LEGO Batman) | Joker (The LEGO Batman Movie) | Kraken | Lex Bots | Lex Luthor | Library Ghost | Lord Business | Lord Garmadon | Lord Voldemort | Lord Vortech | Mammoth | Manti Leader | Mary Lou Barebone | Master Chen | Mecha Sonic | Metal Sonic | Micro Managers | Monsters | Mr. Burns | Mukor | Nindroids | Orcs | Overlord | Percival Graves | Poison Ivy | Queenie Goldstein | Red Fury | Riddler | Robo-Sonic | Sauron | Scarecrow (LEGO Batman) | Scarecrow (The LEGO Batman Movie) | Shadow the Hedgehog | Sorcerers | Stay Puft Marshmallow Man | Stripe | Skeletons | Tails Doll | Terra | Terror Dogs | The Tri | Theif | Trolls | Turrets | Two-Face (LEGO Batman) | Two-Face (The LEGO Batman Movie) | Vortech Minions | Weeping Angels | Wheatley | Wicked Witch of the West

See Also
Batman Villains | Superman Villains | Justice League Villains | Middle-Earth Villains | The LEGO Movie Villains | Ninjago Villains | Back to the Future Villains | The Wizard of Oz Villains | The Simpsons Villains | Scooby-Doo Villains | Portal Villains | Jurassic Park Villains | Doctor Who Villains | Ghostbusters Villains | Mission: Impossible Villains | Harry Potter Villains | Adventure Time Villains | Gremlins Villains | LEGO Villains | LEGO DC Villains | Steven Spielberg Villains | Powerpuff Girls Villains | Teen Titans Villains | Sonic the Hedgehog Villains | 20th Century Studios Villains | Amblin Entertainment Villains | Cartoon Network Villains | Paramount Villains | Metro-Goldwyn-Mayer Villains | Sony Pictures Villains | Matrix Villains | New Line Cinema Villains | Warner Bros. Villains | SEGA Villains | Universal Studios Villains