Goku meets the bad pun loving Lord Kaio. Goku gets permission to train by telling Kaio a joke and Kaio tells Goku that he must catch Bubbles on his planet. There's one catch though. Kaio's planet has 10 times of Earth's gravity. Gokuu catches him in 3 weeks and a impressed Kaio thinks that he could master the Kaioken (World King Fist).
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