Metal Sonic was created by Dr. Eggman as a robotic counterpart to Sonic and first appeared in Sonic CD in 1993, where he races Sonic and kidnaps Amy Rose. Unlike Sonic, he rarely speaks, communicating through mechanical sounds and movements that became his signature in later games, cartoons and comics. As sprite animations, gameplay edits and meme videos spread online, creators began isolating his entrance and movement noises as a reusable cue for robotic rivals, mirror matches and villain reveals.