Doraemon (1979): 1x3

Memory Bread for Testing

The episode starts with Nobita running into Doraemon and asking him for a tool to help him study for his examinations that takes place tomorrow. Doraemon gives him some Memory Bread which Nobita eats and understands the work. Later, he relaxed and ate desserts until he became full, but Doraemon forces him to eats extra memory bread. The episode ends with Nobita vomiting and re-eating memory bread from the start the very next day.