Shadow the Hedgehog (シャドウ・ザ・ヘッジホッグ Shadō za Hejjihoggu?) is a character that appears in the Sonic the Hedgehog series. Characterized by his sharp attitude and strong sense of purpose, Shadow is a recurrent arch-rival of Sonic the Hedgehog, whom he resembles and with whom he shares many abilities. His trademark power is Chaos Control, which allows him to warp time and space using a Chaos Emerald. Shadow is the "Ultimate Lifeform" (究極生命体 Kyūkyoku Seimeitai?), created aboard the Space Colony ARK over fifty years ago by Professor Gerald Robotnik. He is the final result of Project Shadow, a government experiment that was only completed by infusing Shadow with the DNA of the alien Black Doom. After his birth, Shadow befriended Gerald's granddaughter, Maria Robotnik. However, the Guardian Units of Nations (G.U.N.) deemed the project a threat and raided the ARK, resulting in the captures of Shadow and Gerald, and the death of Maria. Driven to madness, Gerald altered Shadow's memories to one day seek revenge