The Marvel-ous World of Ponies

Twilight walked to the center of the control room, an alarm blaring on one of the screens. Somepony had stolen the Alicorn Amulet. All they could gather about the theft was that somepony had come from Ponygard, presumably Rainbow Dash's adoptive brother, and taken the Alicorn Amulet. Fortunately, the theif was arrogant, or foolish, enough to leave his name. Prince Mischief.