Chaos Devil

The Chaos Devil is a gelatinous monster created by Dr. Eggman and Dr. Wily. It is a merging of the ancient water demi-God Chaos and Dr. Wily's creation the Yellow Devil.

Blue Hero Destroyer
Chaos Devil was first revealed when it was accidentally released by Rouge the Bat during her mission to bring down the Wily Egg from the inside. The monster was swiftly kept tame by Metal Sonic and Bass but not before it was able to trap Rouge inside it's body. Once the monster was moved back into it's containment tank, the captured Rouge was taken to be roboticized. (SU: 53