but will that be the only extra thing that happens, naruto being able to transform? I was mostly asking how much more powerful/smarter/etc. like the end result of their combine power. Granted naruto has the chakra but if he had the nine-tails controlling his own chakra to benefit naruto without trying to take him over what would that bring to the table.
can they really merge?? cuz half of kyubi's power is inside naruto (the mental part n not the physical part)
Not really, remember the fight against Pain? Naruto turned into the 8-tailed Kyuubi. So I think it's possible for him to go all out.