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If I wasn't just dreaming, that monster is a real menace!

Sonic the Hedgehog, Sonic Adventure

Perfect Chaos (パーフェクトカオス Pāfekuto Kaosu?) is a transformation that appears in the Sonic the Hedgehog series. It is the Super State of Chaos, assumed by absorbing the negative energies of the seven Chaos Emeralds.[1]

Approximately 3,000 years ago,[2] Chaos assumed this form to destroy the Knuckles Clan and the rest of the world in vengeance, but was sealed away in the Master Emerald by Tikal. In the present day, when Chaos returned due to Dr. Eggman, it became Perfect Chaos again and resumed its rampage until it was defeated and calmed down by Super Sonic.

Concept and creation

Perfect Chaos' design in Sonic Generations was how it was originally meant to look like in Sonic Adventure. However, due to the technological restraints of the Dreamcast, it was not possible at the time.[3]


Vastly more different than any of Chaos' previous forms, Perfect Chaos is a gargantuan monster composed entirely of pure, water-like energy. Its main body resembles a thick snake whose head, back and sides are covered in dark blue reptilian skin with scales. On the other hand, its underbelly is made of clear liquid energy, and it has pointy liquid spikes protruding from its back. It possesses also large mouth with green razor-sharp teeth and a green tongue that extends far beyond its eyes, which are green as well and have slit-like pupils. It also has flaps of blue skin with scales hanging from just behind its eyes, green horns along its nose area and behind its eyes, and a fin-based bulge on top of its head that has its organic brain floating inside it. Also, running from the base of its body to its back spikes and brain are massive green-glowing arteries. The base of its snake-like body ends in a flood of liquid with several liquid-composed tentacles extending from it.

In Sonic Adventure, its enhanced port Sonic Adventure DX: Director's Cut and its 2010 remake, Perfect Chaos' entire body is composed of liquid, with no distinction between the different sections of its skin, and the spikes on its back are merely blunt buldges. Also, with the exception of its eyes, it lacks any green details and arteries, and the base of its body merges with the water below it in a huge cyclone with only two tentacles extending from its base.



A mural in Lost World depicting Perfect Chaos in ancient times, from Sonic Adventure.

Approximately 3,000 years ago, chief Pachacamac of the Knuckles Clan and his men attacked the Altar of Emerald, home to Chaos and the Chao that it protected, to seize the Chaos Emeralds in the altar to further their war efforts. During their invasion, Pachacamac and his men injured both the native Chao and their friend Tikal. In a fit of anger and sadness over the harm brought to its friends, Chaos used the Chaos Emeralds' negative energies to become Perfect Chaos and destroyed Pachacamac and his men, and nearly the entire Knuckles Clan. However, Perfect Chaos, now corrupted by rage and hatred, would not stop its rampage and would have destroyed the whole world had it not been for Tikal, who sealed herself and Chaos inside the Master Emerald in order to stop Perfect Chaos.[2]

Sonic Adventure

In Sonic Adventure, its enhanced port Sonic Adventure DX: Director's Cut and its 2010 remake, approximately 3,000 years after its imprisonment, Chaos was freed from the Master Emerald by Dr. Eggman who sought to transform it into Perfect Chaos and use it to destroy Station Square and build Robotnikland on it.[4] Still brimming with rage though, Chaos decided to remain under Eggman's command while the doctor collected the Chaos Emeralds so it could resume its rampage.[2] When Eggman failed, Chaos rebelled against Eggman and went after the Emeralds itself, eventually becoming Perfect Chaos again.

Perfect Chaos rampaging through Station Square, from Sonic Adventure DX: Director's Cut.

Perfect Chaos soon after appeared in Station Square, flooding it with water and began devastating it with its powers. Shortly into its rampage, Perfect Chaos got confronted by a vengeful Dr. Eggman in the Egg Carrier 2. However, Perfect Chaos stood up to the attack shot down the vessel with a single energy beam. Following that, Perfect Chaos had absorbed all the negative energies from the Chaos Emeralds and expelled the relics across the ruins of Station Square. This act proved to be Perfect Chaos' own undoing however, as Sonic the Hedgehog was able to harness the Chaos Emeralds' positive energies to transform into Super Sonic and defeat Perfect Chaos in this state. With its defeat, Perfect Chaos reverted back to Chaos 0 and its anger neutralized by Super Sonic, returning it to the peaceful creature it once was.[5]

Sonic Generations

Perfect Chaos rampaging through Station Square, from the console/PC of Sonic Generations.

In the console/PC version of Sonic Generations, after Dr. Eggman sent Sonic to White Space with the Time Eater during his an attempt to erase Sonic's past, Sonic confronted Perfect Chaos again during his trip back in time to when the deity attacked Station Square. Despite not having the Chaos Emeralds to become Super Sonic, Sonic was still able to hold his ground against Perfect Chaos and ultimately defeat it.

Other game appearances

Sonic Chronicles: The Dark Brotherhood

In Sonic Chronicles: The Dark Brotherhood, Perfect Chaos is mentioned by several characters at different points in the story, most noticeably about how Perfect Chaos' destruction of the Knuckles Clan allowed the Nocturnus Clan to reign supreme in the ancient world before they were banished to the Twilight Cage. The people of earth, however, believed that the Nocturnus Clan's disappearance was simply due to Perfect Chaos having destroyed them too. It is also suggested that the effects of Perfect Chaos' first attack lead to the creation of Angel Island. Perfect Chaos is also given a profile in the codex in the game's Journal and is mentioned in several other entries as well.

Mario & Sonic at the Olympic Winter Games

Perfect Chaos ice sculpture, from the Wii version of Mario & Sonic at the Olympic Winter Games.

In the Wii version of Mario & Sonic at the Olympic Winter Games, a statue of Perfect Chaos appears at the end of the Sonic World version of the Dream Figure Skating event when the ice rink assumes the appearance of Station Square. The statue of Perfect Chaos in particular is made of ice and has the appearance of Perfect Chaos from Sonic Adventure and Sonic Adventure DX: Director's Cut, and has only two tentacles. Curiously, the statue is still able to move around despite its composition.

Over the course of the event, the contestants collect the Chaos Emeralds while launching dashes towards Perfect Chaos, jumping into its body and damaging it. After hitting Perfect Chaos, the contestants will turn back to repeat this maneuver in different configurations. Towards the end, Perfect Chaos will explode as the players complete their final poses.

Powers and abilities

Due to being infused with the negative energy of the seven Chaos Emeralds, Perfect Chaos accordingly commands unlimited power and has access to unlimited energy.[6][7] Supposedly, it possesses enough power to destroy the whole world.[8]

Perfect Chaos' energy bullets, from the console/PC of Sonic Generations.

Perfect Chaos' main ability is its hydrokinetic powers. In this form however, they have been enhanced to unprecedented heights, reaching the point where Perfect Chaos can control water over a vast area and flood an entire city like Station Square in a matter of seconds using colossal tidal waves and local water sources. It can as well manipulate water in a more delicate manner, such as conjuring up tornadoes of water or creating water sprouts strong enough to keep entire roads suspended in midair.

Being made of liquid energy, Perfect Chaos is nearly indestructible and can mimic the properties of water. It has complete control over its physical structure, allowing it limited shapeshifting, such as elongating its tentacles for greater range, changing its shape into liquid, and if dissipated, it can reconstitute itself again. Additionally, it can melt together with the water around it, allowing it to become one with its floods and merge from water elsewhere. Due to its size, Perfect Chaos has enormous strength, enough to destroy entire buildings with just one strike of its tentacles.

Perfect Chaos' mouth laser, from the console/PC of Sonic Generations.

Perfect Chaos has the ability to project highly destructive energy in different ways, namely as energy blasts in various colors. It can spit out an immense energy beam from its mouth which packs enough power to destroy the Egg Carrier 2 in a single shot, shoot energy bullets from the spikes on its back which can decimates entire buildings and fire clusters of energy balls.


Perfect Chaos' brain, from the console/PC of Sonic Generations.

Despite its immense power and stature, Perfect Chaos shares it weakness with its earlier forms: its brain. Whenever it is struck, it not only causes Perfect Chaos great pain, but also makes its entire body structure weaken and crumble. This is a highly vulnerable spot, as Sonic was able to defeat Perfect Chaos during the Time Eater incident without becoming Super Sonic by attacking its brain.

In other media


Sonic X

Perfect Chaos, from "Flood Fight".

In the anime series Sonic X and its comic series published by Archie Comics, Perfect Chaos appeared as a part of the series' adaptation of Sonic Adventure. In this media, Perfect Chaos has an increased "back" size and several new tentacles. It also possesses additional abilities, like absorbing attacks, creating crystal spires of water and generate force-fields.

Much like in the games, Chaos transformed into Perfect Chaos to destroy Pachacamac and his tribe after they forcefully invaded its home. It would not stop its rampage though, so Tikal sealed it inside the Master Emerald. Generations later, Perfect Chaos emerged again, this time on Earth, due to Dr. Eggman, but it was defeated and calmed by Super Sonic.

In the comic series, Perfect Chaos appeared again when Dr. Eggman forced it to transform while fusing it with his Greenbots, creating the machine-hybrid Chaosbot which obeyed his commands. However, Perfect Chaos had free will restored and its body released from the robots thanks to Super Sonic.

Books and comics

Archie Comics

Perfect Chaos, from Sonic the Hedgehog #83.

In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Perfect Chaos appeared as a part of the comics' adaption of Sonic Adventure. Like in the games, Chaos became Perfect Chaos when the Knuckles attacked its home, but was stopped by Tikal and the Seven Server Chao who sealed it in the Ancient Onyx.

Centuries later, Chaos was freed by Dr. Eggman who sought Perfect Chaos' power. However, Chaos eventually rebelled and became Perfect Chaos once more. Perfect Chaos then began laying waste to Station Square, but thanks to Tikal, Super Sonic and Knuckles, Perfect Chaos was defeated and returned to its normal state, purified of its anger and rage.

After the timeline was rebooted due to the Super Genesis Wave, Perfect Chaos' history became vrtually identical to its game counterpart's.

Sonic the Comic

Perfect Chaos, from Sonic the Comic #183. Art by Richard Elson.

In the Sonic the Comic series published by Fleetway Editions, Perfect Chaos appeared as the series' final foe. In this media, it resembles a large, bulky squid and possesses additionally abilities, including a fear effect and reality warping.

After Dr. Ivo Robotnik gathered the Chaos Emeralds with his Chaos Resonator, Chaos followed the emeralds there and appeared before them when Sonic and his friends confronted Dr. Robotnik. Chaos quickly absorbed the Chaos Emeralds, becoming Perfect Chaos, and began reshaping Mobius in his own image. All seemed lost, as Sonic and his friends were unable to stop Perfect Chaos, but then Super Sonic arrived and defeated Perfect Chaos by jumping into him and absorbing all of his chaos energy, thus returning him to his original Drakon form.


  • Perfect Chaos' destruction of a city, large appearance and powerful attacks such as a mouth beam makes Perfect Chaos highly reminiscent of Kaiju, giant monsters portrayed in Japanese media such as the creature Godzilla. In particular, Perfect Chaos bears a resemblance to the Kaiju Biollante from the Godzilla film series.


  1. 1.0 1.1 Sonic Team (27 June 2003). Sonic Adventure DX: Director's Cut. Nintendo GameCube. Sega. Cutscene: Cutscene 9 (Super Sonic). "Tails: Chaos only used the negative power of the Emeralds. Sonic, you should be able to harness their real power!"
  2. 2.0 2.1 2.2 "カオスエメラルド伝説" (in Japanese). ソニックアドベンチャー ナビゲーションガイド. SoftBank. 16 March 1999. pp. 156–158. ISBN 978-4797308624.
  3. BradyGames (1 November 2011). "Interview with Sonic Team's Iizuka-san". Sonic Generations Official Strategy Guide. BradyGames. p. 206. ISBN 978-0744013429.
  4. Sonic Team (27 June 2003). Sonic Adventure DX: Director's Cut. Nintendo GameCube. Sega. Area: Mystic Ruins. "Eggman: Ooooh, yes! It's just as the stone tablets predicted. Ha ha ha ha ha! His strength increases every time I feed him a Chaos Emerald! With all 7 Emeralds in him, he'll be invincible! And work for me! Together, we'll destroy Station Square! And on its ruins, I will build Robotnikland, the ultimate city!"
  5. Sonic Team (27 June 2003). Sonic Adventure DX: Director's Cut. Nintendo GameCube. Sega. Area/Level: Ending sequence (Super Sonic's story). "Knuckles: Chaos has changed again. This time for the better. / Tails: Yeah! Super Sonic must have neutralized it, so it's nice again."
  6. Sonic Team (27 February 2004). Sonic Battle. Game Boy Advance. Sega. Area/Level: Emerald Beach (Shadow's Episode). "Sonic: I've heard that he who collects 7 "Chaos Emeralds" will be granted unlimited energy."
  7. TailsTube #1 (feat. Sonic). YouTube. Sonic the Hedgehog (24 March 2022). Retrieved on 24 March 2022.
  8. Sonic Team (27 June 2003). Sonic Adventure DX: Director's Cut. Nintendo GameCube. Sega. Area/Level: Cutscene: Cutscene 9. "Tikal: My heart has always been in the Master Emerald, along with Chaos'. Now he's filled with anger and sadness. And If it goes on, he'll eventually destroy the world, like he did before!"

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