Freeza Saga

Freeza, who destroyed the Saiya planet in the battle with Bardock is in search of the Dragonballs to become immortal. The Z Warriors discover about Freeza's plot to conquer the universe and travel to space to stop Freeza and his minions. Vegeta joins the surviving Z Warriors, but only to insure that Gokou survives the battle so that he could kill him personally. (However, Vegeta ends up marrying Bulma, and Bulma is now pregnant with Trunks.) Everyone was killed in the battle against Vegeta except for Gokou, Gohan, Krillin, and Yajirobe. Piccolo died protecting Gohan, so the Dragonballs of Earth vanished. Without the Dragonballs, Kami dies as well. Bulma later discovers that there are Dragonballs in the planet Namek, but it would take thousands of years to travel there. Then, Tao Pai-Pai appears and tells about the ship that Piccolo and Kami took to travel to Earth. With a faster spaceship, our heroes reach Namek and encounter Freeza. Next, and throughout the rest of this series, the Z Warriors fight against Freeza. Freeza had called on Team Ginew to fight the Z warriors, but Team Ginyu was killed by Vegeta (except for Ginyu, who accidently turned into a frog when he tried to swap bodies with Vegeta and Gokou threw a frog in his path). These battles go on episode after episode... On one battle, Gokou gets angry enough when Krillin dies and reaches Super Saiyan level for the first time. He finishes Freeza off (as well as destroy Freeza's planet) with a single blast, and Freeza learns about the true powers behind a Super Saiyan. Afterwards, Gokou escapes to planet Yardrat, where he learns the ability to teleport. Freeza's father, Cold, later learns about Freeza's defeat and quickly gathers Freeza's body parts, which are floating around in space. His henchmen re-ensemble Freeza. (This is why Freeza was half robotic.) Freeza tells his father about Gokou and his powers, but his father believes that he is the universe's strongest warrior and doesn't believe him. Freeza, his father, and his crew land on earth to seek revenge on the Z Warriors, as well as destroy Earth on the way. But all of a sudden, a figure comes out of nowhere and adult Trunks appears. He turns into his Super Saiyan level and aids the Z Warriors in their fight. Trunks faces Freeza and his crew and easily kills them. (The dead Z Warriors were restored to life with a wish from the Dragonballs on planet Namek.) Trunks introduces himself as Bulma's and Vegeta's future son who grew up and traveled back in time with medicine to prevent the death of Gokou so that future would not be in chaos. Everyone thinks that Gokou is dead, but Trunks tells that Gokou is on Yardrat and will return soon.