nope, that's itachi ONLY ability, the l - r ability. and since sasuke is itachi's brother, they have the same genes of abilities
2, LOL you made the no sense and like your theory, the manga debunks it
shisui's kotoamatsukami, that itachi is not permanent
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LIKE DANZO, after use, the ms vanishes into the next year
3. true, but he don't use tsukuyomi nor amaterasu, again it gives support that all ms is not the same, whether r and l eye ability or not,
4. LOL bs, debunked
obito stopped kakashi's kamui at a long range from the mazou
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they're DIFFERENT
/thread