The series follows Sonic the Hedgehog and his anthropomorphic friends that accidentally teleport from their home planet to Earth after attempting to save one of their friends from Sonic's nemesis Doctor Eggman. Separated, Sonic is saved by a human boy named Chris Thorndyke, who helps him find his friends while repeatedly scuffling with Doctor Eggman and his robots over control of the powerful Chaos Emeralds, and becoming celebrities. The final story arc sees Sonic and his friends return with Chris to their world, where they enter outer space with a newfound plant-like creature named Cosmo and fight an army of aliens called the Metarex.
