Frieza, pissed at the fact that he still couldn't defeat Goku or Vegeta, decided to go and train himself to become stronger than those blasted Saiyans! But no one in the Frieza Force would be able to assist him in his training, so he decided to scour different planets in hopes of finding a punching bag for himself... This... This is where you come in.

Frieza: Hm? What is that high energy level that I am sensing? Could it be? Have I finally found a suitable warrior to assist me in my training?