Kisame and Itachi's copies were using the bodies of some hapless fools. They burned those bodies out to the death, so I doubt they used very much of Kisame and Itachi's own chakra. Besides, didn't Kisame and Itachi leave Konoha at one point because Itachi was stretching his strength already when fighting Kakashi & Co? Itachi isn't some uber pool of chakra like Deidara The Armless Ninja seems to be. Although considering Deidara has unlimited pool of explosive clay, I guess generating chakra out of nowhere is one of his lesser skills.Originally Posted by Abdula
Well, I'm outta this debate anyway. That arc was so ridiculous in general I feel like I'm losing IQ just by trying to remember its "finer" details.