Quote Originally Posted by XanBcoo
I vaguely remember that. Do you remember where it happened?

I checked the Kakashi Gaiden, but didn't bother looking any further because fuck this manga.

In any case, that doesn't make it a variation of the Rasengan. By that logic, every jutsu ever is just a "variation" of some other jutsu because they share hand seals and elemental manipulation. It's an issue of semantics, but they are completely different (but similar) jutsu.
Actually I remembered it slightly wrong a little upon looking it up a bit. Kakashi can make a Rasengan, but was unable to add an "element" to it in conjunction, and the outcome was just Nature Manipulation in the form of Chidori.