When Nagato reanimated everyone who died in the village, Katsuyu was with him.
Couldn't Naruto use Katsuyu to help Nagato, or is it for some other reason?
When Nagato reanimated everyone who died in the village, Katsuyu was with him.
Couldn't Naruto use Katsuyu to help Nagato, or is it for some other reason?
When Naruto returned to Konoha, Tsunade ordered one of its smaller clones to stay in Naruto's pocket and keep him informed of Pain's abilities. naruto wikia
First and foremost, Tsunade didn't intend to heal Pain from the start but just wanted to located naruto instead. Even if Katsuyu implied to do, I think smaller clone are smaller in ability like healing and other. Probably, the Katsuyu in Naruto's pocket can't have enough chakra to heal Pain.
Furthermore, Katsuyu's clones are extremely resistant to high amounts of damage, as seen during Invasion of Pain Arc. Katsuyu is also able to absorb people into its body, thus protecting them from physical impacts like the large-scale Shinra Tensei using its own high durability. naruto wikia
Aside from that , Katsuyu seem to absorb physical impacts only and it can't do nothing to chakra overexertion from as far as I watched.
As revealed by later chapters, Gedo: Rinne Tensei is a Tensei Ninjutsu, meaning, it transfers the life-force of the user onto another (or others).
This was confirmed by Obito by saying that to revive Madara, he would need to throw his life away.
No amount of chakra in the world could have saved Nagato, just like Naruto's chakra didn't save Chiyo back then (only helped her complete the technique).
1st, Chakra IS Life Force
2nd Nagato didn't have enough chakra at the time to revive the whole village as stated in Chapter 449
While Nagato died, it should be noted that it was when he revived a whole bunch of people, and when Obito said he die if used it on Madara (chapter 614) who was dead for over 17 yrs, both were extreme cases..... it can be assumed that if you don't have enough chakra, then you'd die if you used Rinne Tensei and the more extreme the case but you could survive if you had enough chakra....
going there, that could mean that the longer the person is dead, the more chakra it'll take to revive them, so if he took time to rest, then it'd have taken even more chakra to revive each person
then Nagato did his jutsu before Naruto knew what was going on so once the jutsu was done and all, then Naruto couldn't help him
while Naruto was able to help Chiyo, Pein's revival jutsu seemed to be even shorter than Chiyo's and Naruto didn't have much of Katsuya and Tsunade used up almost all her chakra so she couldn't transfer chakra to Nagato even if she wanted to...