Titus

'Titus was a professional conman, pretending to be a scientist who has developed a De-Roboticizer that can also immunise people against roboticisation. He would target the aristocracy and other rich people, conning them into paying for immunisation. He was coerced by Robotnik into turning his fake into a real Roboticizer as a trap; suffering an attack of conscience, he pushed Sonia out of it at the last moment as roboticized himself as a result.