 Whenever people get in trouble, go missing, or fall victim to a villains' latest scheme, Melon and Bitterbug (Lefuneste) take their places temporarily.In the show, Walter and Bitterbug replaced spoofs of characters from pop culture such as Superman, Batman, Spider-Man, Hulk, James Bond, Indiana Jones, Kirk and Spock, Luke Skywalker and Han Solo, Tarzan, Mad Max, two of the Power Rangers, Jason Lee Scott and Billy Cranston, the Terminator, Fox Mulder, John Rambo, Little Red Riding Hood, Aladdin, Pinocchio and Jiminy Cricket, Dr. Alan Grant, Marty McFly, Hercules and Casper the Friendly Ghost.Unlike most heroes, Walter is a dim-witted, overweight jolly French American time traveler with a large melon-shaped nose and a lot of luck, but nobody ever notices the apparent change in appearance, with his character's apparent weight gain merely being commented on immediately after his arrival and subsequently ignored.