Plot : ten years after leaving friends and family to hone his skills, goku has become helpless against the mystic power of the dragon balls when a wish made by devious emperor pilaf -- that goku become a child -- comes true despite the setback, goku teams with his granddaughter, pan, and capsule corp pre sident trunks to go to outer space to find the missing black star dragon balls. Dragon ball gt a hero's legacy movie english dub download. Dragon ball gt: goku's side story! si xing qiu is a testament to courage , known in america as a hero's legacy (japanese: