Metal Sonic is Dr Eggman's robotic copy of Sonic the Hedgehog, first appearing in Sonic CD in 1993 as a silent, high speed rival built to outrun the hero. Later games and animated appearances gave the character a synthesized voice, and short voice clips like this greeting began circulating in fan edits, gameplay videos and soundboards. The line endures because it sums up the character in under a second, a polite introduction from a machine designed to destroy Sonic, making it perfect for ironic entrances online.