In a fantastical Halloween carnival, Batman and Joker engage in a hilarious chocolate pie fight amid oversized treats and spooky decorations. The vibrant atmosphere is filled with colorful lights and the scent of chocolate, all under a full moon casting an eerie glow. Batman, in a sleek, dark costume with a utility belt of Halloween gadgets, dodges flying pies while Joker, clad in a whimsical purple suit, laughs maniacally, covered in chocolate. A quirky robot assistant tumbles into a pool of chocolate, adding to the chaos, as carnival-goers cheer, creating a whimsical scene of playful rivalry and festive mayhem.