Kisame could sense the real Naruto with his skin remember and good point with the Gamabunt thing but Sasuke could use Susanoo and shoot arrows at Gamabunta
Yeah but you have to remember
how Kisame sensed it. The reason that
shadow clones in particular are hyped up is because they make it hard to find the real one. An example would be how Neji couldn't find the real Naruto easy by looking at the chakra comparison between the clones. Kisame does the same thing in a way, he senses using
chakra itself, so he should logically be confused as well or so I'd figure.
Wouldn't Sasuke be drowning if he's in the water with Naruto? Unless he can make an air bubble big enough for him + Susano'o somehow xD