PJ Masks PJ Masks is based on French author Romuald Racioppo’s imaginative and striking picture book series ‘Les Pyjamasques’ . PJ Masks follows the thrilling night time exploits of three young friends who transform into their dynamic super hero alter egos, Catboy, Owlette and Gekko, when they put their pyjamas on at night and activate their animal amulets. Together they embark on action packed adventures, solving mysteries and learning valuable lessons along the way