Chaos 6

Chaos 6 is a transformation of Chaos. It is the final boss for Big and Knuckles and the fourth boss for Sonic in Sonic Adventure and Sonic Adventure DX: Director's Cut. It is fought on the Egg Carrier.

Appearance
After absorbing six Emeralds, Chaos has changed dramatically once again. It is no longer even vaguely humanoid, but a giant and obese four-legged scorpion/frog-like creature with two tails. It also has eight or more eyes, a bulldog-like head and a mouth filled with razor sharp teeth. Its tail is tipped with a pendulum type blade. The Emeralds it absorbed are now all around its body.

Powers and abilities
Unlike its previous forms, Chaos 6 cannot be injured by attacking its head, as the brain is now too deeply situated to be damaged. Chaos' new powers include creating powerful shock waves and trying to inhale enemies to eat them. It can also make dozens of spikes stick out of its body and smash enemies with its huge tail empowered by energy. It can also smash its body on the ground, created huge shockwaves of energy.

Sonic/Metal Sonic
Work with the perimeter of the large area, where there are a few rings. Don't get close early in the fight. Chaos 6 begins the fight by trying to suck into its maw. Run and jump against the wind until it subsides. to defeat the monster, First attack and deactivate one of the satellites. Use B button or X button to pick up a deactivated satellite, then run at the monster and press B button or X button again to throw it. If it strikes Chaos, he freezes. When Chaos is frozen attack him. Repeat the process four times to win the fight. When the monster emits long tendrils, stay still until you must move to avoid one. When the tendrils retract, run and jump from the swinging tail.

Knuckles
To defeat Chaos 6, freeze it, then crack it while it's defenseless. Glide away from Chaos 6 until its suction subsides. Attack one of the small satellites and pick it up. Run and use B button to throw it at Chaos 6. When the monster freezes, attack it quickly. It take four hits to knock the beast to bits. When Chaos 6 emits long tendrils, stand still until you must move. When the tendrils retract, Jump and glide away to avoid the swinging tail.

Big
When Chaos 6 advances, aim for the small red target inside it to rescue Froggy. When Chaos 6 advances, aim for the small red target inside it to rescue Froggy. Let the monster get close to improve your aim. Cast beyond the beast so the lure passes through the target. With Big's bull's-eye well past the monster, the lure should hit the mark about halfway up Chaos 6's gelatinous body. Mission accomplished.

Sonic X
Chaos 6 makes an appearance in the anime series Sonic X where it appeared in "Head's Up, Tails!". When Dr. Eggman got Froggy and choked the Chaos Emerald it had swallowed out of it, the doctor gave the Chaos Emerald and another he got to Chaos 4, transforming it into Chaos 6. He then fed Froggy to Chaos 6, giving it back its tail. When Big tried to save Froggy however, Chaos 6 sucked it in him and Chris. Sonic then appeared and attempted to rescue his friends, but got pinned down. However, Knuckles came to Sonic's rescue and they came up with a plan to free Chris, Big, and Froggy. They found Chaos 6's weak spot and with Knuckles using the Shovel Claws to expose it, Sonic defeated Chaos 6, causing it to revert back to Chaos 0 and relinquish the Chaos Emeralds it had taken.

Trivia

 * This is the final form of Chaos before he turns into Perfect Chaos.
 * Both Sonic and Knuckles can finish Chaos 6 easily when frozen with the Maximum Heat Knuckles Attack and Light Speed Attack.
 * It should be noted that the Chaos Emeralds in artwork of Chaos 6, are more like diamond than their usual shape.
 * It is also different from the artwork of in-game, because Chaos 6 has the same shape of Chaos Emeralds inside.