Dragon Ball Z - Movie 5 & 6 (DVD)

Dragon Ball Z Movie 5: Cooler's Revenge
After defeating Frieza, Goku returns to Earth and goes on a camping trip with Gohan and Krillin. Everything is normal until Cooler - Frieza'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.

Dragon Ball Z Movie 6: Return of Cooler
Cooler has resurrected himself as a robot and is enslaving the people of New Namek. Goku and the gang must help.