The Elements of Chaos
Status
Summary
When Sonic the Hedgehog accidentally warps into Equestria, Twilight and her friends try to send him home. But they discover that the world barrier spells are weakening, and letting through creatures far less desirable than blue hedgehogs-beings that would love to eat the world and everything in it. Sending Sonic home might kill him, as well as destroying both Mobius and Equestria.