When a rogue portal in the Emerald Forest throws Team RWBY into a world fractured by an awakening ancient evil, they find themselves entangled with the legendary hero, Sonic the Hedgehog. Transformed by Dark Gaia's energy, Sonic must navigate his new monstrous form, reunite the broken planet, and uncover the truth alongside his new, unexpected allies from Remnant. Can they fix a world they never knew and find their way home?