Board Thread:Naruto Discussions/@comment-12509038-20140806073433/@comment-1629132-20140806193845

NightAssassin wrote: This chapter was pure BS. Perfect susanoo(with wings) has only been used with EMS users. not with a normal MS. and second he souldnt be able to just pull perfect susanoo out of his ass like that. Even madara and sasuke had to master their susanoo in stages. they didnt magically go perfect susanoo one day.

Just because it wasn't shown before doesn't mena it was impossible to learn Susanoo at a different pace. Anyway the others had to work at it And Kakashi just got all of Obito's chakra assimilatd in him at once, so that probably makes a difference. Also EMS is still MS, but permanent. It's not like a whole new form of Sharingan. That's why it doesn't have its own article