Dragon Ball Z: The Tree of Might

After defeating Freeza, Goku returns to Earth and goes on a camping trip with Gohan and Krillin. Everything is normal until Cooler - Freeza's brother - sends three henchmen after Goku. A long fight ensues between our heroes and Cooler, in which he transforms into the fourth stage of his evolution and has the edge in the fight...until Goku transforms into Super Saiyan.

The Z Warriors discover an unopenable music box and are told to open it with the dragon balls. The contents turn out to be a warrior named Tapion who had sealed himself inside along with a monster called Hildegarn. Goku must now perfect a new technique to defeat the evil monster.

As Goku investigates the destruction of the Southern Galaxy, Vegeta is taken to be King of the New Planet Vegeta, and to destroy the Legendary Super Saiyan, Brolly.

The evil Dr. Wheelo has resurrected his brain into a robot and now desires to inhabit the body of the world's strongest warrior. This means he must face Son Goku and company in a fight for Goku's life.