Sonic Hedgehog Answer summary Sonic the Hedgehog, a free-spirited blue hedgehog who can run at supersonic speeds. He lives on South Island (or generally on Earth/Mobius) and spends his life fighting his… Explore related resources Talk with Sonic Hedgehog — Sonic the Hedgehog, a free-spirited blue hedgehog who can run at supersonic speeds. He lives on South Island (or generally on Earth/Mobius) and spends his life fighting his… About Sonic Hedgehog Sonic Hedgehog machine-readable summary