Goku student of Grandpa Gohan
Five years later, Goku meets his evil older brother Raditz and learns about his heritage. Goku comes from a race of nearly extinct extraterrestrials called Saiyans, himself having been sent from their home planet to prepare Earth for sale on the intergalactic market by destroying all its life. While Grandpa Gohan was taking care of him, Goku accidentally fell into a deep ravine and suffered a severe head injury, which caused him to forget his mission and drastically altered his personality.After Raditz kidnaps Goku's son Gohan, he forms a truce with Piccolo in order to defeat Raditz. After sacrificing his life during the battle, Goku trains with King Kai in the Other World. He teaches Goku the Kaiō-ken, which multiplies his energy and strength but with possible strain to the body. It is from King Kai that Goku learns his most powerful attack: the Genki-Dama, an energy sphere created by gathering energy from surrounding animals, nature and humans.After being revived by the Dragon Balls, Goku faces off with the Saiyan prince Vegeta, who eventually becomes his greatest rival and another ally. On his journey to Planet Namek in order to aid his friends in gathering the Namekian Dragon Balls to revive those killed by the Saiyans, Goku fights the galactic tyrant Frieza, who destroyed the Saiyans' home planet and nearly the entire race. During his epic battle with Frieza, Goku becomes the first Saiyan in a thousand years to transform into a fabled Super Saiyan.After defeating Frieza and escaping the destruction of Namek, Goku learns a teleportation skill called Shunkan Idō, taught by the inhabitants of the planet Yardrat. Goku contracts a heart virus whereof the time-traveler Trunks warns him, but recovers after taking medicine provided by Trunks. Goku trains Gohan to be his successor and sacrifices himself again during the battle against the evil bio-android Cell. Goku is temporarily resurrected on Earth seven years later and meets his second son Goten.Goku battles Vegeta again after Vegeta willingly falls under the control of the wizard Babidi in order to gain power. Shortly after, he is drawn into a battle for the universe against the monster Majin Buu. Despite having mastered two new Super Saiyan transformations, Goku prepares Goten and Trunks to take his place as Earth's defender. After his life is fully restored, Goku attempts to fuse with Gohan in order to defeat Buu, but this fails when the latter is temporarily absorbed by Buu and so he persuades the newly arrived Vegeta to fuse with him, creating Vegito. Goku destroys Buu with a Spirit Bomb attack. Ten years later, during another World Martial Arts Tournament, Goku meets Uub, Buu's human reincarnation, and leaves with him, intending to train him as the new protector of Earth.
apprentice of disciple of pupil of follower of learner of