The Three-Star Dragon
With Goku winning his battle against Nuova Shenron, he spares the dragons life in exchange for not killing Pan when he had the chance. But things get complicated when Eis Shenron shows up to reveal a shocking secret that no one saw coming. With the odds stacked against him, Goku fights for his life against the terrible twosome.
Aired 20/08/1997EP 56 - The Three-Star Dragon
Dragon Ball GT
Emperor Pilaf finally has his hands on the Black Star Dragon Balls after years of searching, which are said to be twice as powerful as Earth's normal ones. Pilaf is about to make his wish for world domination when he is interrupted by Gokuu Son. As a result, Pilaf flubs his wish and accidentally turns Gokuu back into a child.
After the wish is granted, the Black Star Dragon Balls scatter across the galaxy. However, Gokuu discovers that they will cause the Earth to explode unless they are all brought back within a year. Uniting with his granddaughter Pan and a young adult Trunks, Gokuu sets off on an adventure through the universe to find the Black Star Dragon Balls and save his planet from destruction.
(Source: MAL Rewrite)