Board Thread:Boruto: Naruto the Movie/@comment-27162446-20151105015144/@comment-26010916-20151107205832

GreatestSin wrote: ^why not vanishing rasengan?

sharingan allows to see chakra as a color, that means that its "invisibility" shouldnt bother her much right? Well you can't copy Rasen Shuriken, or any of the Rasengan variants. Maybe the Rasengan itself like Kakashi did.

But the Vanishing Rasengan from the terms of the series, is an S Rank ability. I'm not joking either. When Kakashi was teaching Naruto about the difficulty of the FRS, he said that any technique that comes out of an elemental nature Rasengan is S Rank in difficulty.

Well the problem with the Vanishing Rasengan is that Momoshiki couldn't sense it, despite being a sensor himself. When he absorbed Kinshiki, he took in his power, and he shows this ability by sensing Sasuke right after he uses Amenotjikara and throws him away. Just like Naruto did in VoTE2 but couldn't stop Sasuke like that.

I'm going to blame plot for him not being capable of sensing it, but it's canon plot lol