Kakashi and Tobi

[thai sage]

Which is why Kakashi needs to do some actual research on his own ability...

I agree but I don't think he's had much free time, using it also takes quiet a bit out of him so it'd also take awhile

if that's the problem. Kakashi can use kamui on his kage bunshin and send it to that dimension.

hm... Never thought about that, good idea, but we don't know how kamui would work on a kage bunshin, it might just dispell it

 

[Sasori of the six paths]

and what happens if he kamui'ed that person...and it wasnt to tobi's dimension? xD screwed...lol and he cant really practice it to study it because he will lose his eyesight in that eye...i think it wont work because if tobi is intangible it cant suck him in