Goku Jr is probably the most relatable Dragonball character. He is nothing like Goku at all with a fighting fetish. He's not aware of his hidden power; he is frightened of bullies, and he holds a lot of anxieties about living up to the Goku name. When Pan falls ill, she gives him a life lesson: strength isn't about having power, but the ability to do the right thing in the face of fear. Goku Jr reacts to this by running off crying, but is inspired when he is alone and depressed and sees pictures of Pan and remembers her stories about Goku. He goes through a little change and gathers up strength to find the Dragonball (he thinks you only need the 4-Star ball) to save Pan.
His newfound mission earns the respect of his bullies, and he goes on a journey with one of them to Mount Paozu, facing several adversaries such as thieves and monsters. There's a wonderful scene where Goku Jr sees his friend fall off a cliff because the young Saiyan was too afraid to act - a consequence of his fear preventing him to do the right thing. Again, he is alone and depressed, but ends up protecting a bear by standing strong in the face of fear, channeling his inner strength, and putting faith in his abilities.
The ending is a great touch too he finds out he can't make the wish because he only has one Dragonball and we see all the built up frustration burst out, but a familiar face comes around and gives him some reassurance, which is a very tear-jerking scene.
