During this series Goku goes under training with Master-Roshi, later Krillin joins Goku in training. Master-Roshi teaches Goku and Krillin the dreaded Kamehameha. Later Goku gets trained again by Karin in his high tower, but this time his training was used to defeat Dr. Gero and to defeat Tao Pai Pai, a professional murderer that has killed one of Goku's new friends. After all this training Goku, Krillin, and Bulma, get together to get the Dragon Balls and Goku finally destroys the whole Red Ribbon head-quarters on his own.