King Arthur (アーサー王 Āsā-ō?), also known as the Black Knight (黒の騎士 Kuro no kishi?), is a character that appears in the Sonic the Hedgehog series. He is a being from the world of Camelot and was a magical illusion created by Merlin for the purpose of becoming a benevolent ruler over England. Under the guiding hand of his creator, Arthur achieved his purpose and became a legend. When he obtained the scabbard of Excalibur however, Arthur was corrupted by its power and became an evil tyrant who enslaved his kingdom. His reign came to an end when Sonic the Hedgehog was called into the world of Camelot and slew Arthur.