Dragonball V

This is a what If story where Vegeta was sent to earth instead of Goku

A space pod with a sleeping baby Vegeta flies towards earth and lands in a forest on a full moon night. Vegeta awakes and hears a voice saying"Awake Vegeta. Destroy all native lifeforms" and stares at the full moon. Suddenly he starts to grow and get hairy. He son outgrows his pod. He then continues to giantic size. By the time he is done he has transformed into a giant ape. He then sees a old man walking and steps on him. He then proceeds to destroy the whole forest and 10 cities before the sun comes up.

The sun then comes up and he returns to normal size and crawls back to his ship. It is night by the time he reachs his ship and finds voice recorder that somehow wasn't destroyed the night before. He plays it and hears voice saying"Hello child. You are a saiyan from Planet Vegeta. The saiyans are a proud warrior race. They go around the universe and destroy all living things a planet. They then sell that planet to whoever will pay the most for it. You were sent to this planet to destroy all of the native lifeforms on it. Once you've done that just press the last button on your right and the saiyans will come and take you home. Remember nomatter what you must never let these people remove your tail." It then tells him how to use some of the most powerful saiyan moves.