Dragon Ball Z Gaiden - Saiya Jin Zetsumetsu Keikaku (Japan)

About

Dr. Raichi is the lone survivor of the Tuffles, a race that once lived on Planet Plant before the invasion of the Saiyans. The Saiyans not only massacred the entire Tuffle race, but also stole their technology and conquered the planet; renaming it Planet Vegeta in honor of their king. Raichi managed to escape and found refuge on the Dark Planet and prepared to eradicate the last remaining Saiyans.