A Light Chaos, a type of Chaos Chao.
Chaos Chao is a  Chao that looks similar to Chaos. It is a form that Chao can achieve by giving a normal Chao special materials.
Creating a Chaos Chao is a long process. In order for a Chao to become a Chaos Chao, it needs to have reincarnated (or "transformed", as the game calls it) at least twice. How the player raises the Chao in its previous lives has absolutely no impact on whether or not a Chao can become a Chaos Chao. After a Chao transforms for the second time, the player can give it at least one of every small animal in the game. The player can still feed it fruit, and should do so to keep their Chao happy. If all of the requirements are met, when the Chao evolves, it should come out of the cocoon as a Chaos Chao.
Chaos Chao have many unique traits. They are immortal, never reincarnating nor dying.
Chaos Drives and small animals do not affect the appearance of Chaos Chao, though they can still come in different colors. Chaos Chao also cannot mate. Though their behavior remains the same before they transformed, they can no longer change their facial expressions with the exception of falling asleep and having their nap interrupted and are still able to blink.
A Neutral Chao will evolve into a Light Chaos, a
Dark Chao will evolve into a Dark Chaos and a Hero Chao will evolve into Hero Chaos. These Chao have an ominous, organ-like jingle when they transform.
Contrary to popular belief, giving a Chaos Drives or extra small animals does not prevent the Chao from becoming a Chaos Chao. This, however, should not be abused, as a Chao must still evolve into a Normal Type (in other words, the Chao must have used the small animals/Chaos Drives in balanced matter: ten red Chaos Drives, ten purple, etc.).
"Raising a Chaos Chao". . Prima Games. p. 110. Sonic Adventure 2: Battle: Prima's Official Strategy Guide ISBN 978-0761539292.
Main article | Scripts ( Sonic, Tails, Knuckles, Amy, Big, Gamma, Super Sonic) | Staff | Glitches | Beta elements | Gallery | Re-releases ( DX | 2010)
Sonic ( Super Sonic) | Tails | Knuckles | Amy | E-102 Gamma | Big | Metal Sonic*
Dr. Eggman | Beta ( Mark II) | Chao | Chaos ( Chaos 1, Chaos 2, Chaos 4, Chaos 6, Perfect Chaos) | Cream* | Delta | Epsilon | Froggy | Grandma | Mr. Know-It-All | NiGHTS | Pachacamac | Tikal | Unnamed Sonic robot* | ZERO | Zeta | Animals ( Deer, Elephant, Gorilla, Kangaroo, Koala, Lion, Mole, Parrot, Peacock, Penguin, Rabbit, Robin, Seal, Sea Otter, Skunk)
Adventure Fields Egg Carrier | Mystic Ruins | Station Square
Emerald Coast | Windy Valley | Casinopolis | IceCap | Twinkle Park | Speed Highway | Red Mountain | Sky Deck | Lost World | Hot Shelter | Final Egg
Sky Chase | Sand Hill | Hedgehog Hammer | Twinkle Circuit | Boss
Beat | Bladed Spinner | Boa-Boa | Buyoon | Cart Kiki | Cop Speeder | Egg Keeper | Electro Spinner | Fighter Aircraft A | Fighter Aircraft B | Gola | Ice Ball | Icecap's unnamed aircraft | Kiki | Leon | mechanical fish | Pirate | Rhinotank | Sky Deck's unnamed jet fighter | Spiky Spinner | Sweeper
Chaos 0 | Chaos 2 | Chaos 4 | Chaos 6 | E-101 Beta | E-101 Mark II | E-102 Gamma | E-103 Delta | E-104 Epsilon | E-105 Zeta | Egg Carrier | Egg Hornet | Egg Viper | Egg Walker | Knuckles the Echidna | Perfect Chaos | Sonic the Hedgehog | ZERO
Bolt of lightning | Climb | Dig | Flight Mode | Glide | Hammer Attack | Hammer Jump | Hover | Homing Attack | Homing Missile Launch | Jump Attack | Laser Gun | Light Speed Attack | Light Speed Dash | Lure Attack | Maximum Heat Knuckles Attack | Pick | Propeller Flight | Punch Attack | Rapid Tails Attack | Spin Dash | Spin Hammer Attack | Spin Jump | Tails Attack
Arm Punch | Bomb Attack | Bomb Gun Attack | Charge | Double Punch | Earthquake Attack | Electric Arm | Energy Ball Attack | Flame Thrower Attack | Guiding Missiles | Instantaneous Liquefaction | Laser Beam Attack | Homing Tail Slice | Inhale Attack | Marble Attack | Phantom Shadow Move | Punch | Quarter Attack | Scorpion Attack | Shockwave Attack ( Chaos 6) | Sonic Boom | Spin Attack | Spinning Spike Attack | Spouting Attack | Squash Roll Attack | Swing Punch
Gimmicks and obstacles
Bumper | Bumper Car | Cannon | Capsule | Conveyor Belt | Crank | Dash Panel | Dash Ring | Drum Can | Explosion Trap | Fan | Flipper | Fountain | Goal Balloon | Hanging Bell | Helicopter | Hint Box | Hint Orb | Icicle | Iron ball | Jump Panel (plate) | Jump Panel (ramp) | Jump Ramp | Laser field | Lit Panel | Mirror | Monkey Detonation Switch | Orca | Point Marker | Power cube | Rocket | Satellite | Slot machine | Spring | Spring Catapult | Switch | Teleporter | Wide spring | Wind Path | Zip Line
Air Bubble | Cart pass | Chao Egg | Chaos Emerald | Doll | Emblem | Emerald Shard | Employee ID Card | Item Box ( 5 Rings, 10 Rings, Extra Life, High-Speed Shoes, Invincibility, Magnetic Shield, Random Rings, Shield, Smart Bomb) | Key Stone ( Gold Statue, Ice Stone, Silver Statue, Wind Stone) | Ring | Sandboard | Snowboard | Sonic Token
Level Up Items Ancient Light | Crystal Ring | Fighting Gloves | Jet Anklet | Jet Booster | Laser Blaster | Life Belt | Light Speed Shoes | Long Hammer | Lure | Power Rod | Rhythm Badge | Shovel Claw | Warrior Feather
English voice actors
Ryan Drummond ( | Sonic) Corey Bringas ( | Tails) Michael McGaharn ( | Knuckles) Deem Bristow ( | Eggman) Jennifer Douillard ( | Amy) Jon St. John ( | Big) Elara Distler ( | Tikal, Station Square Train Voice, Default Menu Voice) Steve Broadie ( | Gamma, Pachacamac, Mystic Ruins Train Voice) Tomoko Sasaki (
Japanese voice actors
Jun'ichi Kanemaru ( | Sonic) Kazuki Hayashi ( | Tails) Nobutoshi Canna ( | Knuckles) Chikao Ōtsuka ( | Eggman) Taeko Kawata ( | Amy) Shun Yashiro ( | Big) Kaori Asoh ( | Tikal) Jōji Nakata ( | Gamma) Tōru Ōkawa ( | Pachacamac) Kaho Kōda (Station Square Train Voice) | Nobutoshi Canna (Mystic Ruins Train Voice) | Elara Distler (Default Menu Voice) | Tomoko Sasaki (
Believe In Myself | It Doesn't Matter | Lazy Days | My Sweet Passion | Open Your Heart | Unknown from M.E.
Sonic Adventure Original Sound Track (Digi-Log Conversation) | Sonic Adventure Remix | Sonic Adventure: Songs With Attitude Vocal Mini-Album | Sonic Adventure Original Soundtrack 20th Anniversary Edition | Passion & Pride: Anthems with Attitude from the Sonic Adventure Era
777 Slots Pinball | Angel Island | Auto Running | Black Market | Card & Pinball | Chao Adventure^ | Chao Garden ( Station Square Garden, Mystic Ruins Garden, Egg Carrier Island) | Chao Race | Chao Stadium | Chao in Space | Chao Machine | Chao Search* | Corkscrew loop | Debug Mode | E-100 Series | Egg Carrier | Egg Carrier 2 | Emerald Radar | Freeze | Life gauge | Mission Mode | Mystic Ruins | Shrine of Knuckles's race | Shuttle loop | | Sonic Adventure (LCD) Station Square | Station Square Police Department | Tails' Lab | Tornado | Tornado 2 | Transporter Machine
Sonic Adventure DX: Director's Cut ^Exclusive to Dreamcast version of Sonic Adventure
Main article | Scripts ( Hero, Dark, Last) | Staff | Glitches | Beta elements | Gallery | Re-releases ( Battle | 2012)
Sonic ( Super Sonic) | Tails | Knuckles | Amy* | Shadow ( Super Shadow) | Rouge | Eggman | Big*^ | Tikal* | Chaos* | Dark Chao Walker* | Chao Walker* | Metal Sonic*
Chao ( Dark Chao, Hero Chao, Chaos Chao) | Gerald | Maria | President | Secretary | Sigma-Alpha 2 | Researcher | Animals ( Bat, Bear, Boar, Cheetah, Condor, Dragon, Gorilla, Half Fish, Parrot, Peacock, Penguin, Phoenix, Rabbit, Raccoon, Seal, Sea Otter, Sheep, Skeleton Dog, Skunk, Tiger, Unicorn)
City Escape | Wild Canyon | Prison Lane | Metal Harbor | Green Forest | Pumpkin Hill | Mission Street | Aquatic Mine | Route 101 | Hidden Base | Pyramid Cave | Death Chamber | Eternal Engine | Meteor Herd | Crazy Gadget | Final Rush
Iron Gate | Dry Lagoon | Sand Ocean | Radical Highway | Egg Quarters | Lost Colony | Weapons Bed | Security Hall | White Jungle | Route 280 | Sky Rail | Mad Space | Cosmic Wall | Final Chase
Cannon's Core | Green Hill
Downtown Race | Grind Race | Planet Quest | Pool Quest | Deck Race | Pyramid Race
G.U.N. Blue Eagle | Bomb Beetle | Bomb Wing | Gold Beetle | Gun Hawk | Gun Beetle | Gun Hawk | Gun Hunter | Gun Wing | Hornet-3 | Hornet-6 | Hornet-9 | Laser Hawk | Laser Hornet | Laser Hunter | Mono Beetle | Phoenix | Rhino Cannon | Rhino Jet | Rhino Metal | Rhino Spike | Shield Hunter | Sky Hawk | Spark Beetle | Spring Beetle
Badniks Buzz Bomber | Chopper | E-1000 | Gola | Unidus | Kiki
Artificial Chaos ( Artificial Chaos P-1, Artificial Chaos P-100, Cell, Float Type, Guard Type) | Boo | Boom Boo
B-3x Hot Shot | Biolizard | Dr. Eggman | Egg Golem | F-6t Big Foot | Finalhazard | King Boom Boo | Knuckles | R-1/A Flying Dog | Rouge | Shadow | Sonic | Tails
Amy Flash* | Black Shield* | Black Wave* | Booming Missile* | Bounce Attack | Captive Light* | Chaos Bind* | Chaos Control | Chaos Impact* | Chaos Screw* | Chaos Spear | Chaos Strike* | Charm Ray* | Crazy Rush* | Crouch | Dark Finish* | Dark Omochao* | Dig | Drill Claw | Drill Drive | Fire Somersault | Glide | Grind Step | Grinding | Hammer Punch* | Heaven's Justice* | Hell Bomber* | Hip Drop* | Hover | Homing Attack | Jump Dash | Kick/Kick Attack | Knuckle Spin* | Laser Missile* | Light Attack | Light Speed Dash | Lock-on | Lock-On Missile | Magic Hands | Omochao | Pick | Power Flash* | Power Laser* | Propeller Punch | Punch (Eggwalker) | Punch/Punch Attack | Rocket Launcher | Rumble Launcher* | Screw Kick | Somersault | Sonic Wind* | Speed Up* | Spin Jump | Spin Dash | Spiral Upper | Storming Heart* | Super Sonic Boost | Swim | Thunder Arrow* | Time Stop* | Volkan Cannon | Wrath of Gaia* | Zap Laser*
Gimmicks and obstacles
Ancient Ruin | Ball Switch | Bungie Vine | Dash Panel | Dynamite | Egg Beetle | Gravity Control Switch | Green energy fluid | Grind Rail | GUN Military Truck | High-speed warp tube | Hint Box | Hourglass | Iron ball | Jump Plate | Laser field | Missile | Pipe | Point Marker | Propeller Spring | Pulley | Ramp | Rocket | Safe | Spikes | Spinning drum | Swing Bar | Time Stop Switch | Turtle | Warp Hole | Warp Wall | Weight | Wide spring
Air Bubble | Balloon | Chao Egg | Chao Key | Chaos Emerald | Chaos Drive | Container ( Cage, Chao Container, Steel Container, Unbreakable Container, Wooden Container) | Emblem | Emerald Shard | Goal Ring | Item Box ( 5 Rings, 10 Rings, 20 Rings, Bomb, Extra Life, Health, High-Speed Shoes, Invincibility, Magnetic Shield, Shield) | Key Stone ( Gate Key) | Meteorite | Outfit | Ring | Snowboard
Level Up Items Air Necklace | Air Shoes | Ancient Light | Bazooka | Booster | Bounce Bracelet | Flame Ring | Hammer Gloves | Iron Boots | Jet Engine | Large Cannon | Laser Blaster | Light Speed Shoes | Magic Gloves | Mystic Melody | Pick Nails | Protective Armor | Shovel Claw | Sunglasses | Treasure Scope
English voice actors
Ryan Drummond ( | Sonic) Connor Bringas ( | Tails) Scott Dreier ( | Knuckles/ GUN Soldiers) Jennifer Douillard ( | Amy Rose) David Humphrey ( | Shadow the Hedgehog) Lani Minella ( | Rouge/ Omochao) Deem Bristow ( | Doctor Eggman) Moriah Angeline ( | Maria Robotnik) Marc Biagi ( | Gerald/ GUN Soldiers) Steve Broadie ( | President) Shelly Fox (Default menu voice) | Jon St. John ( | Big) Elara Distler ( | Tikal) Tomoko Sasaki (
Japanese voice actors
Jun'ichi Kanemaru ( | Sonic) Kazuki Hayashi ( | Tails) Nobutoshi Canna ( | Knuckles) Taeko Kawata ( | Amy) Kōji Yusa ( | Shadow) Rumi Ochiai ( | Rouge) Chikao Ōtsuka ( | Eggman ) Etsuko Kozakura ( | Omochao) Yuri Shiratori ( | Maria) Kinryū Arimoto ( | President) Shun Yashiro ( | Big) Shelly Fox (Default menu voice) | Tomoko Sasaki (
A Ghost's Pumpkin Soup | Believe In Myself | Deeper | Dive into the Mellow | E.G.G.M.A.N. | Escape from the City | Fly in the Freedom | For True Story | It Doesn't Matter | Kick the Rock! | Live and Learn | My Sweet Passion | Rhythm And Balance | Space Trip Steps | Supporting Me | The Supernatural | Throw It All Away | Unknown from M.E. | Vengeance is Mine
Multi-Dimensional Sonic Adventure 2 Original Sound Track | Sonic Adventure 2 Vocal Collection: Cuts Unleashed | Sonic Adventure 2 Official Soundtrack | Sonic Adventure 2 Battle - Sampler | Sonic Adventure 2 Original Soundtrack 20th Anniversary Edition | Passion & Pride: Anthems with Attitude from the Sonic Adventure Era
2G Hi-Speed Shoes | Angel Island | Auto Running | Black Market | Central City | Chao Adventure 2^ | Chao Garden ( Dark, Hero, Neutral) | Chao in Space | Chao Kindergarten | Chao Machine | Chao Race | Chao Stadium | Chao Transporter^ | Chao World | Corkscrew loop | Cyclone | Eclipse Cannon | Eggman Bombom | Eggwalker | Emerald Radar | Fake Emerald | Gerald Robotnik's diary | Health Gauge | Kart Race | Prison Island | Project Shadow | Rank | Shuttle loop | Space Colony ARK | Station Square | Teleporter | Totem Pole | Winding Tunnel
*Appears or is playable only in the 2P mode
^Exclusive to Dreamcast version of Sonic Adventure 2