Re: Kakashi DID know he had MS
People also forget that pre-shippuuden, two chidori shots automatically drained Sasuke's chakra (forcing the Cursed Seal to come out), yet no one says Sasuke has low chakra. In that Kakashi Gaiden alone, we saw Kakashi use Chidori so many times it isn't even funny, and not once has he hinted that his chakra was severely depleted. Even if he didn't 'practice' being a ninja from then up to the point where he is Team Seven's leader, it would be absurd to think that his chakra levels decreased, seeing as how he wasn't at that point of age where his body fails him (Sarutobi).
Originally Posted by ShaneEyyy
Your evidence doesn't really 'prove' that Kakashi knew he had the Mangekyou Sharingan before hand.
1) You claimed that all his improvements were made so that he could face Itachi
I disagree. Jiraiya told him the Akatsuki (a group of all S-ranked shinobi, including Itachi) were coming for Naruto and that Kakashi was severely under-prepared for what was to come. This is the second time were danger outside of his scope has threatened his students (Akatsuki -> Naruto & Orochimaru -> Sasuke). There was much more than Itachi as to why he made improvements. Secondly, all ninjas want to improve themselves to protect their loved ones (and village).
2) You claimed that looking back at the Haku vs Sasuke fight you "already knew he had it"
I disagree. Nothing indicated that Sasuke "already had the Sharingan", we only know because later down the line, the author tells us he had unlocked it prior to. Had the author not done so, we would have assumed that this was the first time Sasuke awakened/used the Sharingan.
3) You claimed that Kakashi was prepared to fight Itachi post-Shippuuden because he had awakened his Mangekyou
Not saying this is entirely false, but you cannot so readily draw that conclusion. One example I can point to that questions this theory is if, by your words, Kakashi already knew that he had the Mangekyou Sharingan, and by training himself to use it adequately, he could counter Itachi's, then why did he ask Gai how he fought Itachi?
4) You claim that Kakashi already knew about Kamui because in this manga, they don't just "find out about their abilities, they already know"
[b]Let me ask you several questions then. If comprehended correctly, you're saying Kakashi already have been practicing with Kamui and it's only 'new' because it's the first time we're seeing it. But then why when we first saw him use it, it took so much time to activate the Mangekyou Sharingan itself, and then the jutsu, as opposed to now? Now he can activate it without a handseal and pretty much instantaneously; not much time transpired from when he first used it on Deidara to the second time we see him using it. Much more time would have transpired in the time-frame that you're suggesting than this. Why when we first saw him use Kamui, his accuracy was pretty terrible as opposed to now where he can pretty much hit his mark with great speed and precision?
Lastly, if he had it all this time and you claimed he was experimenting with it all the way up to this time, why did it take all the way up to Shippuuden (vs Itachi once more) for him to finally retort about the blindness?
You could be right, however, the story is just so poorly constructed that I'd think it to be more feasible to believe otherwise.