By some mistake instead of being stuck on a Mushroom Planet. Dr. Robotnik is instead sent to Equestria, Were he takes over the Storm Kings army and uses it to find his way back to earth and gain ultimate power and taking over this new world!
Tempest Shadow has an untold past that nopony really understands. One day, she tells Twilight Sparkle what actually happened on the day she lost her horn and also learns a valuable lesson; that everypony is truly wonderful in their own way...