oh my god someone can be overated or sorry not that,, have power ups out of nowhere.. ps. keep in mind gyuuki (8-tails) wanted to be warped, or kakashi warped just that octopus leg, same how bee fooled sasuke... and minute earlier he was restored/obtained great amount of chakra by nine tails...
maybe kkakashi can take bijuu, doesn't make sense but kishi wants so.. = kakashi can give a match to any bijuu.. huoh bijuus are weak against mangekyo anyway