Board Thread:Versus Debates/@comment-43403813-20190805194702/@comment-43403813-20190805205018

Pain was most definitely not at full strength when he started battling Naruto. He had just used Chaotic Shinra Tensei, and fought the whole Hidden Leaf village as I mentioned earlier. If Pain attacked Naruto with killer intent (remember Pain was trying to capture Naruto and not kill him) and attacked Naruto from the very start, Naruto would be dead. Pain started off without access to Deva path for the majority of the battle against Sage Naruto and had already exhausted a considerable amount of chakra, so saying he was at full strength at the start is not true.

Naruto had constant help as well. Pain had successfully captured Naruto until Hinata interfered and triggered the Kyuubi rampage. Pain had also forced Naruto into almost going complete Kyuubi mode, which would literally kill him, but interference happened again when Minato redid Naruto's seal.

Moreover, when crippled Nagato was hit by a lariat from Killer Bee, it visibly did nothing and Nagato began to absorb chakra. Nagato could handle Killer Bee as well as Naruto at the same time, in the situation you mentioned.

Kakashi failed to warp the Gedo Mazo's head, and the Chibaku Tensei is not a fixed size, it would be difficult for Kakashi to successfully warp it with debris constantly being added to the mass of the Chibaku Tensei. Bare in mind, Itachi, Killer Bee and Naruto were able to land their ninjutsu due to the gravitational pull of the Chibaku Tensei. Given that Kakashi's Kamui is a space-time jutsu, gravity would not have an impact on this, and Kakashi would have a difficult time locking onto the core in the first place if he is plummeting upwards towards it.