Metal Sonic is the robotic counterpart of Sonic the Hedgehog, created by Dr. Eggman and first appearing in Sonic CD in 1993, where he served as a rival built to match Sonic's speed. Over the following decades he returned in games, comics and fan animations, becoming a favourite for edits that need a cold, mechanical villain. This 67 version circulates online as a short meme sound, often detached from any single scene, and it stays popular because the number lands like a taunt and the voice is immediately familiar to Sonic fans.