Shadow the Hedgehog (シャドウ・ザ・ヘッジホッグ) is a fictional character in Sega's Sonic the Hedgehog series. He is an artificially created black and red hedgehog whose hover shoes propel him at extreme speeds that rival those of Sonic. He can also use the Chaos Emeralds to amplify his innate Chaos powers, which manipulate time and space through a technique called "Chaos Control", and use a variety of different powers. The character first appeared in Sonic Adventure 2, where he was depicted as a villain and later an antihero; making his own decisions. Suffering from a tragic backstory; on occasion, he becomes an ally to Sonic and his friends, but remains at odds with them due to their differing moral compasses.