Nazo is the main antagonist of the Chakra-X series Sonic: Nazo Unleashed and its sequel The Return of Nazo, as well as the main antagonist from the upcoming movie The Wrath of Nazo. He first appears in Sonic X, but was supposedly cut. A fan interpretation of a early appearance of Super Sonic, he is a being of negative energy created by the Seven Chaos Emeralds, which he uses to transform, alongside the Master Emerald, in order to further his goal of universal destruction.
He appears in Sonic: Nazo Unleashed as the main antagonist and an enemy of Sonic and his friends.