From Nintendo: The evil Dr. Eggman (aka Dr. Robotnik) stumbles upon an alternate dimension where some odd birds called Flickies have the ability to travel anywhere. In order to get help in his search for the Chaos Emeralds, Dr. Eggman transforms the Flickies into robots that will help him track down his coveted gems. Of course, it’s up to our favorite blue hedgehog, Sonic, to step in and save the day. Jump into this 3-D adventure as Sonic or his buddy Tails, and collect the golden rings to help free the Flickies and defeat the doctor.