Originally posted by Dark-Jaxx
1. Because he has shown less talent with the Mangekyo Sharingan than even his brother. Itachi did not implant his Sharingan into him, that would literally require ripping his own eyes out and putting them into Sasuke's(however the hell that would work).
Sasuke has Itachi's sharingan in his, thats why he is able to use tsukiyomi, and amaterasu, it says right in the databook its from Itachi.
Lol no one knows how it works, but its not like Madara took it and forced it into his own eye sockets, or ate it or somethin, there is most likely a symbolic way of obtaining the power of their brothers eyes
It was an after-effect. But said after-effect only happens to those who have a normal Mangekyo Sharingan, not an Eternal one like Madara's. Actually, having an Eternal means that your eyesight does not deteriorate at all. Does that mean you have infinite chakra? No, it means you can use MS as much as you desire without losing your eyesight.
IF it was straining aftereffect it wouldn't neccerarily mean he's going blind, there's difference between merely straining from overusing something, and going blind. MS requires chakra, even if Madara spams MS he'll strain, he won't go blind, but it'll definately hurt him.
2. I guess that's why Sasuke showed some impressive Biju controlling while fighting Kirabi. And no, it is not on the same level as Madara's, this is shown by the deteriorating eyesight, the blurry vision. When Madara's Sharingan went Eternal,"The darkness never came again," Sasuke is already feeling MS side effects. Sasuke never even HAD an MS, so it cannot be a combo of both.
Like i've said a couple times before, Kirabi has full control over his Bijuu, Naruto does not. Kirabi can transform into his full form Bijuu, Naruto cannot.
Naruto has very little control over his Bijuu, and can only borrow some of its power, which is what Sasuke is able to supress at their current levels.
He can reach Three Tails instantly. IIRC.
No he can't
Control an unrestrained Kyuubi? Nah.
What is an "unrestrained Kyuubi"? Naruto can only borrow his powers, either that, or he can permanantly rip the seal off and he'll die (thats IF he can rip off the seal)
Which he can, but it is not proven that he can do it to a much higher level of Kyuubi.
Naruto can only borrow his powers, thats all, Kyuubi states himself that Sasuke is able to supress his power, if Naruto can use its full form like Kirabee (which he can't) and actually fully transform into Kyuubi, then Sasuke probably cannot supress that with his current level of Sharingan.
But Naruto's current power over his bijuu is merely him borrowing some of its power, Sasuke can overcome that with his sharingan.
Gee, it prolly has something to do with Naruto being a pussy who never wants to use Kyuubi again? [/B]
More likely that Sasuke is able to supress his power so Kyuubi cannot protect him anymore, thats why he fears for Naruto's life.