Whole Lotta Snakin' Going On is the second half of the tenth episode in the first season of Stanley
Stanley loves his pajamas more than everything, even though he is already worn out and meanwhile much too small for him. Stanley did not want to take off his clothes anymore. When Stanley takes a trip to The Great Big Book of Everything, he learns that even snakes shed off their old skin when they grow.
Dennis: Pythons are in many parts of the World. Including Australia.