Dragon Ball Z: Saiya-jin Zetsumetsu Keikaku

Dr. Raichii, the presumed last survivor of the Tsufurujin race, seeks vengeance against the remaining Saiyans, Goku and Vegeta, for their species' annihilation. He deploys machines that release destron, a gas capable of eradicating all life on Earth. With only 72 hours remaining, the Z warriors must locate and eliminate Dr. Raichii before the gas can be fully unleashed.