Dark Ring

Dark Rings are a group of artificially created rings. These rings are the normal Chaos Rings corrupted by Dr. Robotnik as a source of evil evergy. Smaller versions of Darks Rings are also seen throughout the game after the player destroys a Badnik, similiar to Sonic Advance 2 but the rings can't be collected. A Dark Ring has a reddish-brown color and can even change someone into a huge version of themselves. Though they're very powerful, once they leave the thing they're powering, the disintergrate. It is unknown if any Dark Rings remain as it is unknown if there are any Chaos Rings.