Whizzer was one of the original 15 puppies given birth to by Pongo and Perdita. Despite being very brave, he had a constant bladder problem, often urinating in places he shouldn't, hence his name. He was kidnapped by Horace and Jasper to be brought to Cruella. When being kidnapped, he bit Jasper's hand to try and defend his siblings. Another showing of his bladder issue is when he's escaping from DeVil manor, and relieves himself on a fashion magazine with Cruella's picture on the cover. He escapes and returns home.