This season has 13 regular episodes. This season marks the first appearance of the three nerds of the Secret Snake Club, a school club dedicated to snakes and their dark powers. Also appearing are Thromnambular, a mysterious talking skull that grants wishes; Wiggy Jiggy Jed, Billy's ideal pet, made from magically combining four dogs; an Invisable duck that makes farting noises; Principal Goodvibes, the friendly but boring principal at Billy and Mandy's school; Daisy, a chupacabra that steps out from the TV while watching a videotape; and Dracula, the senile king of the vampires, now living in a retirement home. Minor characters that would later recur are Judge Roy Spleen, and Irwin's grandmother, Tanya. Recurrent characters that are also featured include Harvey, Bride of Fankenstein, Wolf Man, Scythe 2.0, Sassy Cat