The Five-Star Dragon
During Goku and Pan's continuing quest for the dragon balls, they stumble upon an abandoned city. They are warned away by a couple that blames the mass exodus on a slime that absorbs electricity. After resolving to stay and complete their task, they find Rage Shenron, the 5-star dragon! And they quickly realize that this electric slime has a bigger and much deadlier purpose!
Aired 25/06/1997EP 50 - The Five-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)