Board Thread:Naruto Discussions/@comment-9782468-20140811214915/@comment-3568954-20140811223338

Elveonora wrote: When did he ever stated to have copied Rasengan with Sharingan? Rasengan can't even be copied to be honest, it uses no hand seals and is just pure chakra control, there's no transformation of chakra.

i agree with you to an extent. but one thing you must understand is with the sharingan kakashi could have looked closely and seen that the rasengan spirals every direction and then after a few months of training worked out how it is created