All Dogs Go To Heaven: The Series (1996) : 3x5

Charlie and Itchy take a stroll on the upper-class neighborhood and meet a rich show dog named Thor, who looks exactly like Charlie. Charlie wants to know what it is like to be pampered, and Thor wants to know what it is like to be a free-spirited street dog, so the two switch places. When Thor's agility contest comes up, and Charlie's expected to do a dangerous move, Charlie soon realizes that switching places between each other is more difficult than at first thought.