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Episode depicted in this article is from 2005 anime.

Say "Nobita is Smart" Again! is an episode from the Doraemon 2005 anime. This episode is called Attaboy, Noby! in the U.S. English version/dub.

Doraemon shows Noby a gadget that can rewind time, and Noby uses it to repeatedly replay a compliment he received from his teacher, Mr. S. The boys end up using it to retrieve a necklace Big G got for his mother's birthday.