Board Thread:Naruto Discussions/@comment-24898250-20140730025315/@comment-3038994-20140805190432

JOA20 wrote: General Awesomo wrote: What could possibly be more likely is Kakashi finally figuring out how to combine his Lightning Release and his Rasengan together. Unlikely. Even Naruto, who's got way better specs for the Rasengan, needs others' help to create the elemental versions.

Are you referring to Sage Art: Lava Release Rasenshuriken and Sage Art: Magnet Release Rasengan? Naruto wasn't used to handling any nature transformation other than Wind Release, much less advanced types. So it's understandable that he needed help. Kakashi, on the other hand, has the two for most of his lifetime.