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Chaos 4

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Chaos 4
Chaos 4 new
Chaos 4
First appearance

Sonic Adventure

Game appearances
Appearances in
other media
Transformation overview


Cause of 

The negative chaos energy of four Chaos Emeralds

Physical description

Transparent blue


Emerald green

Skills, powers and abilities
Enhanced powers
and skills
  • Enhanced hydrokinesis
  • Hydrokinetic Shapeshifting
  • Energy wave emission
  • Levitation
  • Skilled swimmer

Chaos 4 is the fourth form of Chaos and a boss that appears in the Sega Dreamcast video game, Sonic Adventure, and Sonic Adventure DX: Director's Cut. It is fought near the lake in the Mystic Ruins with Sonic, Tails and Knuckles.


Chaos changes considerably after absorbing four Chaos Emeralds. It is now a huge shark-like creature with razor like fins. The third and fourth Chaos Emeralds absorbed are now located in its belly.


Chaos 4 was encountered after Sonic the Hedgehog and Tails finished their battle with Knuckles the Echidna, where Dr. Eggman stole the Chaos Emeralds they had to turn Chaos 2 into Chaos 4. Chaos 4 proceeded to attack the heroes, but was defeated.

Onboard the Egg Carrier, Big the Cat also encountered Chaos 4, but only briefly before it transformed.

Powers and abilities

Chaos has now new powers, that includes being able to fire energy waves, swimming at high speeds, creating water explosions by slamming his body on water, and turning into four balls that bounce toward the player. If Chaos 4 is out of water it simply floats in the air. Chaos also can launch an extendable arm, charged by energy to the opponent as well.


Chaos 4
Chaos 4 new
Chaos 4

Sonic Adventure


Mystic Ruins

Other appearances

Sonic Adventure DX: Director's Cut

Boss guide

Sonic/Metal Sonic

The battle with Chaos 4 is fought over water. Use the lily pads to stay out of the water, and jump immediately if you slip and fall. Chaos 4 attacks if he senses you sitting in the water. Hop around the lake. Chaos 4 uses a variety of distance attacks that consist of multidirectional shock waves. When Chaos 4 stops attacking and pokes his head up, Just as the Chaos before him, Chaos 4 breaks into small pieces, then reforms. Keep out of his way until he pops up, then let him have it.


Chaos 4 is fought over water. keep Tails out of the pond as much as possible, It's Chaos 4's element. Chaos 4 attacks quickly when Tails lands. drop on a ring, but jump immediately to dodge Chaos 4's attack. Don't fly farther than you need to, and stick close to Chaos 4. Chaos 4 is temporarily vulnerable when it rises. Quickly land near it and attack. Jump clear when you hit the beast. The reforming energy balls can hurt you. It takes four hits to sink Chaos 4.


Hopefully, by the time you face Chaos 4 as Knuckles, you've seen the Chaos monster's fourth incarnation while playing as another character. Knuckles has trouble getting out of the pond if he falls in. Make quick stops on the lilypads and wait for the monster to peek up. You can land beside Chaos 4 and use Knuckles's punching attack, if you're willing to risk getting hit. Alternately, ball up and drop on the monster from above. You have to score four hits to sink the beast.


Sonic Adventure DX - Sonic vs Chaos 405:32

Sonic Adventure DX - Sonic vs Chaos 4

Sonic Adventure DX - Tails vs Chaos 405:29

Sonic Adventure DX - Tails vs Chaos 4

Sonic Adventure DX - Knuckles vs Chaos 405:56

Sonic Adventure DX - Knuckles vs Chaos 4

Appearance in other media

Sonic X

Chaos 4 cut

Chaos 4 in Sonic X.

Chaos 4 first appeared in "A Chaotic Day" in Sonic X. In this media, Dr. Eggman tricked Sonic and Tails to search for a Chaos Emerald, only to drop in and steal their Chaos Emeralds. After a brief battle with Eggman's Egg Hornet, Eggman gave the two Emeralds to Chaos 2 in a nearby lake, transforming it into Chaos 4. Chaos 4 attacked Sonic and Tails with energy waves, forcing Sonic to fight back. However, because Chaos 4 was in its right element, it could evade Sonic by diving underwater and use the lake's water against him as tornadoes, and even Sonic's regular attacks did little to stop it. As Sonic and Chaos 4 went for fighting close up, Chaos 4 kept dunking Sonic, until Sonic used a strong wind to charge at Chaos 4 at full speed, damaging it enough to make it unable to reform. Upset, Eggman retrieves Chaos and fled.


Sonic Adventure

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