Dragon Ball GT episode 39 - Baby Put To Rest
Now that he's at full power, Goku is much stronger than Baby. With no other way out, Baby hits Goku with his Revenge Death Ball. Goku is enveloped by the blast, but refuses to give up. He absorbs the energy. He then fires a powerful Kamehameha wave at Baby, knocking him unconscious. Goku then blasts away Baby's tail, causing him to regress into his earlier form. Knowing that he is greatly outmatched, Baby extracts himself from Vegeta's body and flees to his ship. Vegeta recovers, but Baby flies away. Determined to finish him off, Goku fires another Kamehameha wave at Baby's ship, blasting it into the sun. They head back to earth and sprinkle the entire surface with sacred water, while Kibito Kai and Gohan do the same on the Tuffle planet. The earth begins to shake violently. Because Baby made another wish on the Black Star Dragon Balls, the earth is still in danger of exploding. In two weeks, it will be one year since Goku was transformed, and that will mark the end of the earth.