Board Thread:Theories and Speculation/@comment-5273810-20150207055437/@comment-2013124-20150409133100

Shadowflame55555 wrote: What do you mean by 'Forbidden Three'? If you're talking about Amaterasu, Tsukuyomi and Susano'o, only Itachi had the first two and Sasuke had Amaterasu (due to their being siblings I assume). Every mangekyo has different powers, Obito's powers being the two variations of Kamui, one for each eye. If he had both eyes he might have used Susano'o then but he didn't so he couldn't.

Also, though it was only stated once and not focused on at all, Kakashi was actually going blind from the mangekyo and he used it far less than Obito did.

Are you sure about Tsukuyomi didn't Sasuke use it during his fight with Danzo? I think Danzo even commented that his usage of it was inferior to Itachi's because he couldn't manipulate the victim's perception of time with it? And aren't two powers required to use Susano'o. The databooks say you have to unlock the power of each eye in order to use it.