Nandemo Furuku Naru (E142)

A shellfish which has gone bad makes Bonobono wonder if there is anything that doesn't get old. He, Chipmunk and Raccoon start looking but can't find anything. Raccoon says that nothing gets newer, so there can't be anything that doesn't get old. Bonobono gets an idea and goes to see Wolverine... (Crunchyroll)