In 1996, McTosis was hired by Twitch, a hamster that had lost his fur and was determined to get revenge on his old friend, Mr Cuddle Bunny. Storing Twitch in his sporran, McTosis travelled to Transylvania and to Castle Frank N. Stein, barging his way in to speak with Professor Frank N. Stein. Once there, he aggressively demanded that he be given Mr Cuddle Bunny's hat. Whilst Chuck D. Head and Igor were busy in Mr Cuddle Bunny's room, Frank attempted to fend off McTosis who was removing the hat from its casing. For his trouble, the professor was crammed into the glass by McTosis and the oversized rabbit forced the hat onto his head. However, he was soon confronted by its rightful owner, who demanded that he cease all the "naughtiness".