I do think that using shadow clones would be the best way to speed up the process.
But Im not to sure on how it will work...
I think that If a clone turns into a frog then releases back to Naruto then that would affect his balance of his Nature chakar... Turning the real Naruto into a forg, if 100 did it at the sametime...
then bang stright frog.... but then the demon chakar will kick in then he will be a FROG FOX DEMON...
Sweet bro good to hear!!!
300,000 clone... daim I think Narutos balls would brake....
man that'll be one ugly looking thing