Well - in Goethe´s "Faust" Mephisto (AKA Satan, the Devil, Prince of Darkness, whatever you want), the Bad, appears in disguise as a poodle, the Good. When Faust recognizes the trick, he notices: "That´s the poodle´s core" . I´m not really saddle-proof in literature, but in Germany this came out a saying, meaning:
Ta-daa😃