While not based on a story by Toriyama, the franchise's creator still played a role in the series' development. Taking place five years after the conclusion of DBZ -- ten years in the Funimation dub -- Goku completes training Uub just as Emperor Pilaff and his associates infiltrate the Lookout to steal the Black Star Dragon Balls, the original Dragon Balls created when Piccolo and Kami were a single being. Accidentally wishing Goku back into a child, the heroes were shocked to discover they only had one year to travel the cosmos and bring all seven Black Star Dragon Balls back to Earth to prevent its destruction. Accompanied by Trunks and his granddaughter Pan, Goku encountered many powerful enemies in his travels and achieved the new combat transformation Super Saiyan 4.
天界に封印されていたもう一つのドラゴンボールの封印がとかれたことから、子供の姿に戻った悟空、トランクス、そして成長した孫娘のパンの新たな冒険がはじまる！ 1年でダークドラゴンボールそろえないと、地球が消滅しちゃう～!! 新しい冒険、新登場のキャラクターや新たな強敵、そして、アニメオリジナルならではの夢の対決も実現！ それが『ドラゴンボールＧＴ』！！
