Chaos (Earth-6515)

"You know nothing, fool! It's Chaos, the god of destruction!"

- Doctor Neo Cortex

Chaos is the immortal God of Destruction, a being entirely made of concentrated energy and the main antagonist of Sonic Adventure. It  was the original guardian of the Master Emerald, and possesses the ability to change form by manipulating the Chaos Emeralds as well as transform in Perfect Chaos.