Dragon Ball GT : A Hero's Legacy

One hundred years after the end of Dragon Ball GT, Pan is the only surviving member of the Z Fighters. She takes care of and trains Goku Jr., her one and only grandchild. It is unknown who his parents were nor what happened to them. Goku Jr. is a very timid person, to the point where he wouldn't fight Puck, a bully who constantly picks on him. Suddenly, Pan fell unconscious one day after Goku came home from school early after an encounter with Puck. Goku considers himself "weak" while he actually has potential, just like other Saiyan-Human hybrids.

After Pan falls unconscious, she and Goku go to Satan City Hospital. While in her bed, Pan tries to encourage Goku to have courage, and that he is special because he is much like Son Goku himself, but to no avail. Goku, seemingly having low self-esteem, retaliates by saying that he'll never be strong. In one final, futile attempt, Pan says to Goku "Be brave and no one can ever beat you." Afterwards, Pan faints for the second time, and the doctors react quickly. One nurse leads Goku to the waiting room, and he asks if his grandma will be okay. The nurse, however, does not and cannot answer his question, and Goku bursts out of the hospital in the pouring rain, running and crying the way home alone.

Back home, Goku hopes his grandma won't die, but then remembers that he could retrieve a Dragon Ball to make Pan better again. The next morning, he sets out for the Dragon Ball and encounters Puck and his gang along the way. One of Puck's friends asks where Goku is headed, and he tells them Mount Paozu. Goku faces put-downs from the gang, telling him he can't go there because there are monsters of all sorts and that he is a coward. The put-downs eventually make him angry, and he tells them to get out of his way. He walks by the gang and proceeds down the road to Mount Paozu. After following the road for hours, he rests for a moment. A truck passes by, and the truck driver offers him a ride. Goku accepts the driver's offer. After driving for a while, the truck driver pulls over and tells Goku to relieve himself because the trip will be long. While Goku is doing business, the truck driver empties his oversized book bag (which is full of food), and throws the bag onto Goku, and speeds off. Goku, surprised, shrugs it off and continues the long journey to Mount Paozu. He meets Puck yet again at a roadside grocery store, who tells him that he became bored and thought it was interesting if he went to Mount Paozu with him, admitting that it would be fun to see a monster eat Goku.

To acquire supplies for the long journey, Puck steals a cart full of food with Goku and escapes the grocery store just in time. While taking the long journey to Mount Paozu, Puck and Goku actually have fun and get along with each other. After encountering obstacles along the way, such as a pack of wolves and a "nice" lady who turns out to be a witch, Goku and Puck finally make it to a long rope-and-wood bridge, which looks dangerously unstable. Puck crosses the bridge first with ease, telling Goku that it seems okay to cross it. Goku crosses the bridge nervously, and a gust of wind distracts him, which makes him stumble. Because Goku stumbled, along with the force of the wind, the bridge rocks back and forth, which was enough to break a rope. With one rope cut, the bridge becomes extremely unstable, and Puck had to rescue Goku before he falls. Puck struggles to save Goku, who is dangling on only one rope above a deep trench. Another rope is broken, and the bridge collapses, causing Puck to fall into the trench. Luckily, Goku was still dangling on half of the bridge, which is still attached to the other side of the trench. Goku climbs out, and with nothing to do to save Puck, continues his journey alone. After traveling another great distance, Goku runs into a purple pig like demon, with the ability to manipulate his forearms into weapons. A grizzly bear, thankful to Goku for helping her cub earlier, attacks the demon trying to distract it so Goku and the cub could escape. Goku becomes enraged, and transforms into a Super Saiyan. He easily dismisses the demon, and soon after passes out. When he comes to, he has no memory of the transformation. Goku arrives to the summit of Mount Paozu, where he finds the old house which Grandpa Son Gohan harbored his ancestor in. He goes inside the old, dusty house, and finds the four-star Dragon Ball in the same place Goku kept it when it was first seen in the first episode of Dragon Ball. Goku takes it and, thinking that you can have one ball to grant the wish, tries to summon Shenron. When nothing happens, Goku becomes aggravated and shouts at the Dragon Ball as if there is someone in there. Again, when nothing happens, Goku throws the ball away, and starts yelling, telling himself that he was foolish to believe such a fairy tale about the Dragon Balls. Apparently, the Dragon Ball rolled to the feet of Goku Jr.'s ancestor, Son Goku himself.

Goku explains to his descendant that he has to collect all seven to get his wish. Goku Jr. gets on his feet, wipes his tears, and turns to his ancestor, stunned to see him. He asks him who he is, and Goku explains that he is his "great-great-grandfather." Confused about how many "greats" that would be, he tells Goku Jr. that he could just call him "Grandpa Goku" in short. Goku explains to Goku Jr. that he is strong and brave, because of his lineage. Out of the blue, a helicopter descends upon the ancient lawn of Grandpa Gohan's property, and reveals that Pan and Puck are inside it. Goku Jr. becomes excited to see everyone alive and well, exclaiming that the Dragon Ball granted his wish. He turns to where Grandpa Goku stood, and is stunned to see that he is nowhere to be seen, but Goku Jr. could hear his voice. Grandpa Goku tells him that it was actually his bravery that restored his grandma's life, including Puck's.

In a final farewell, Grandpa Goku wishes Goku Jr. good luck. Goku Jr. boards the helicopter with newfound strength, courage, and bravery with the four-star Dragon Ball in his hand. The Dragon Ball will be a keepsake for Goku Jr. to remind him of Grandpa Goku, just like how Grandpa Goku kept the Dragon Ball as a keepsake of Grandpa Gohan.