Oga Tatsumi has been through his share of fights and knows how to throw a good punch. You can’t count him out of any match but Buu isn’t your average opponent. Buu can regenerate from just about any hit and his raw power was enough for him to go up against Super Saiyan 3 Goku. Oga just doesn’t have that kind of firepower and he will also be out of his league when it comes to speed as well. Better luck next time Oga, but your run is over. Buu wins.