Fan Casting Sonic Adventure 3: Space (2004)

Sonic the Hedgehog, in a clash against the Meterex leader, Dark Oak, throws away the emeralds across the universe so that he and his friends will save time to travel to every planet and collect them all to destroy the Meterex and save the galaxy. They are aided by a young plant girl named Cosmo the Seedrian who escaped the Meterex and seeks to defeat them after they destroyed her home and family. While Dr. Eggman stalks the heroes in their path along with the revival of Shadow the Hedgehog, who was found after his fall from saving the planet and now has amnesia.