Note: I dont own any of the original dragonball, dragonball z, or dragonball gt material. So please dont sue me.
Dragonball XC : Dark Saiyan Saga : Chapter 1
Ok, this takes place right after the end of Dragon Ball is now the guardian of the dragonballs meaning that he can call upon the eternal dragon anytime he wants. Goku and Vegeta jr. have just finished the world martial arts tornement and goku comes out the victor. Goku senior is going to take Goku and Vegeta jr. under his wing to train them before Goku sr. moves on to another planet. He begins to train them finding that Goku jr. is much like Gohan ,gentle,but Vegeta jr. is more like his great great grandfather. But Goku jr. is more gifted in martial arts than vegeta jr. but has trouble revealing his true power without emotion. Whereas Vegeta will push himself without there training the both of them learn the kamehameha and the spirit bomb and Goku shows them all of the ssj forms. But Goku and Vegeta jr. can only reach ssj 1. Then a space ship lands in a desert and out comes two Saiyans one tall with short hair and a tall long haired one. Both of them having use there scouters to find Goku and Vegeta jr. training. The new Saiyans reveal there names the tall one is Nios and the other Rotto. They both are looking for the dragonballs and Goku and Vegeta jr. dont have there powers conceled and the saiyans thought that they were the protecters of the dragonballs. Then goku senses there power and meets them in the desert.