The Sallybot is a near-perfect robotic doppelganger of Princess Sally, created by Snively for the purpose of infiltrating the Knothole Freedom Fighters and locate Knothole for Dr. Robotnik. When the Sallybot got to Knothole, however, Tails was able to detect that she was not the real Sally. Rotor then reprogrammed her and made her turn on Robotnik and Snively.