Scourge was an evil version of Sonic the Hedgehog. He attempted to switch places with Sonic but was defeated by him. Scourge was sent back to his home dimension. Scourge was exposed the Master Emerald, which made him green fur and super strength. Scourge took over his own world. He attempted to use his "Suppression Squad" to take over Mobius (Sonic's homeland). The Freedom Fighters (Sonic's posse) attempted to stop him, but he seemed to be too powerful in his Super Form. Sonic tricked him into returning to normal state thus allowing Sonic to defeat them. Scourge attempted to escape, but failed. Scourge was imprisoned the No Zone Prison.
Scourge has Sonic's powers. As such, he can use super speed and the spin dash move. His transformation seemed to give super stamina and strength. With the Chaos Control, he can teleport. Like Sonic, he can change into a super form.