Silver Shill is an earth pony, who helps Flim and Flam promote their new tonic by pretending he was "cured (season 4, "Leap Of Faith.") In the end, he calls Flim and Flam out on their scam, and quits his job helping them.

He is seen wearing different costumes each time, as a different pony to make it seem less suspicious. However, he always wear large, black rimmed glasses until the very end when he takes them off.