Naruto later learns to enter Hermit Mode, albeit at first through the Secret Toad Oil, in his effort to learn Senjutsu. He seemed to be more skilled when training, being said to be learning faster than Jiraiya did (This could be attributed to his Shadow Clone training). Unlike Jiraiya's Hermit Mode, that changes his body to be more frog-like in appearance, the only changes in Naruto are his eyes, which Fukasaku mentions, are always present in Hermit Mode, and is the sign of a true hermit. It has also been revealed that in Hermit Mode that the user's body becomes more durable towards physical attacks, such as when Naruto falls off a cliff onto stone spikes, it did not hurt him at all. Another effect of Hermit Mode is the ability to sense everyone else's chakra in the area. Fukusaku also stated that the natural energy surrounding Naruto became a part of his body, and his attacks are more dangerous and have a greater reach then usual.
In order to balance out the weaknesses, Fukasaku and/or Shima must fuse to the user's shoulders, after which they help gather the natural energy required to sustain Hermit Mode, in other words, they can remain still while the user can move and not be defenseless. Fukusaku attempted to fuse with Naruto so that he could gather natural energy without having to stay still. However, the Nine Tails inside Naruto stops Fukusaku from fusing with him. Naruto decided to learn how to gather Natural Energy while moving. When Fukusaku tells Naruto that it is like looking left and right at the same time, Naruto gets an idea which is unknown to us at the moment, although it is likely that it has something to do with the Shadow Clone/Wind Release: Rasengan training he did with Kakashi. However, during Naruto's fight with Pain, neither Fukasaku nor Shima are seen on either shoulder, suggesting he may have discovered a way to overcome the weaknesses.
(I wanted to type it but i rahter show you what I actually read)
