Renfield first appeared on Angel Island, having invited Knuckles and the Knothole Freedom Fighters to the Happy Land Amusement Park which he operated. Renfield, with the aid of Dr. Ivo Robotnik, then trapped Sonic and the rest of the Knothole Freedom Fighters in a House of Mirrors (within the mirrors themselves). Instead of being trapped in the mirrors, Knuckles' chaos-based powers were robbed from him. Robotnik allowed Knuckles to leave, wanting him to feel totally helpless without his powers. Knuckles fled and later met up with the rest of the Chaotix, including Heavy and Bomb. Knuckles and the Chaotix liberated Sonic and the others, and making short work the repaired Metal Sonic robot. Robotnik ditched Renfield and allowed him to be captured by Knuckles while he escaped alone. Later on,