After a run in with Dr Eggman causes an anomaly involving the Chaos Emeralds, all of them are thrown into different universes. Can any of them find their way around/back before Eggman takes advantage of the situation?

Charlie Brown and friends are invited to compete in a brand new All-American racing series. All is fair in Fun and Friendly Competition. but What is really going on? Why have they, specifically, been chosen to race?