Cooler

Dr. Raichii is the only Tsufurujin (the race eradicated by the Saiyajin many years ago) thought to have survived. He now is going to take revenge on the only surviving Saiyajin still alive, Goku and Vegeta. He uses machines that emit destron, a gas that will destroy all life on Earth. Now the the Z warriors only have 72 hours to find and destroy Dr. Raichii. by ANN

After their battle with Frieza on Namek, Goku and Gohan have decided to take a little camping trip for much needed rest and relaxation back on Earth. But their peaceful weekend trip is soon interrupted by Cooler, Frieza's brother whose definately not happy with our saiyan heroes! Out for revenge, Cooler and his powerful Armored Squadron won't rest until the man who destroyed…