FOR ALL OF U WHO SAY CURSED SEAL, THERE IS ONE THING U ARE LEAVING OUT. SASUKE HAD HIS SEAL OUT AT LVL 2, YES WE ALL KNOW THAT, BUT NARUTO HASNT MASTERED CONTROLLING THE FOX. THINK ABOUT IT. THE FOX'S CHAKRA IS RED. NARUTO'S IS BLU. DURING THE FIGHT, THE RASSENGAN WAS BLUE, BUT IF HE FULLY MASTERS THE FOX, THEN IT SHOULD BE EITHER RED, OR PURPLE. ALL SASUKE HAD TO DO WAS GO INTO WOMAN SASUKE MODE AND HE WAS AS STRONG AS HE'LL EVER GET THAT SEAL, BUT NARUTO WAS ONLY USING THE FOX AS A BATERY AND A SHIELD, AND NOT A FULL THROTLE WEPON DURING THE LAST CHIDORI VS RASSENGAN.