This is a tribute to Road to Ninja. Naruto seemed to have forgotten his character development as he lamented the loss of his parents and he couldn’t take down the villains when the going got tough. This wasn’t the Naruto that I was used to seeing so he couldn’t win this tribute. Buu would have no trouble speedblitzing Naruto all day until he won the match. A simple blast would end the planet and that would put Naruto in a pretty tough spot. Naruto can’t keep up with Buu’s speed or strength so he’s effectively doomed. Buu wins.