Riding the Rails is a 1938 Fleischer Studios animated short film featuring Betty Boop and Pudgy the Pup. Although some sources claim that this film was nominated for an Academy Award, it does not appear in the official Academy Awards database.
The film inspired a large variety of collectibles in the 1930s, although originals are now rare to find.
Film Daily called it "subway fun", and gave the following synopsis:
"The exciting adventures of Betty Boop's dog, Pudgy, who insists on following his mistress when she goes downtown in the subway. He gets on the train, and then his troubles begin. After almost disrupting the train service, he is flung off, and is forced to walk the tracks back to the station, with trains whizzing down on him from all directions. When he finally arrives safely back home, he is cured of wanting to trail around town with Betty."