While Sonic engages the forces of a local egg boss, Tails and Chip retrieve the Gaia Key that the egg boss had captured. And Chip makes a startling discovery about himself.
Sonic the Hedgehog; Dr. Eggman; Metal Sonic; Walter Naugus; Wendy Naugus; Tails; The Witch Carters [Bearenger the Grizzly; Faulk Wolf; Carrotia the Rabbit]; Orbot; Cubot; Nephthys the Vulture; Clove the Pronghorn; Thunderbolt the Chinchilla; Battle Lord Kukku XV; Akhlut the Orca; Abyss the Squid; Tundra the Walrus; Mordred Hood; Axel the Water Buffalo; Conquering Storm; Maw the Thylacine
Synopsis
When one of Dr. Eggman's facilities is conquered by the Naugus Twins acting in concern with the Witch Carters, Dr. Eggman summons all of his planetary egg bosses to mount a counterattack.