Attack of the Lesson: Two evil spirits, who make people lazy and over eat, are released from their jars. But everybody is already lazy and eat too much, so the spirits have no work. A super-hero named The Lesson comes from beyond to make the city right again, but nobody is forcing the citizens into their bad habits. The Lesson decides to force the citizens to learn a lesson even if it hurts them. A Case of Evils: After Master Yo accidentally swallows some of Carl's backwash after accidentally drinking after him. This causes Yo to slowly become evil. Yin and Yang rush to try to save their master.