Werewolf Cream
Doraemon and Nobita argue who is scarier, a werewolf or mom. Doraemon takes out the werewolf cream to transform himself to prove a point. Mom finds the cream and uses it before heading out to an old friend's house. Doraemon, worried, tags along to prevent mom from transforming whenever she looks at a round object.
Aired 23/07/1979EP 97 - Werewolf Cream

Doraemon
Nobi Nobita is a 4th-grade boy in Tokyo. One day, a round, blue cat-style robot (minus ears) pops up in his desk drawer. Nobita's great-great-grandson (or something) lives in the 22nd Century, but thanks to Nobita's mistakes, the entire family is living in poverty. To rectify this, Nobita's descendent is sent Doraemon back to the past, to help prevent Nobita from making mistakes. Of course this is a difficult task since Nobita is the weakest and least intelligent child in his class. Doraemon does, however, have a 4-dimensional pocket on his front, which contains cool gadgets from the future. With these toys, Doraemon will try to help Nobita. Unfortunately, Nobita also has the bad habit of misusing Doraemon's gadgets and landing himself in yet more trouble?
(Source: AnimeNfo)