. . "Dark Rings (Sonic)"@en . "The Dark Rings are synthesized Power Rings used by Dr. Robotnik as a source of energy and objects featured in the videogame Knuckles' Chaotix. They are reddish-brown in color."@en . . . "The Dark Rings are synthesized Power Rings used by Dr. Robotnik as a source of energy and objects featured in the videogame Knuckles' Chaotix. They are reddish-brown in color."@en . .