At first, there might be a misunderstanding between them. The fem demon foxes might mistake Naruto for someone who wants to harm them. But Naruto, through his actions of kindness and protection, clears up the misunderstanding. This makes the fem demon foxes feel guilty for misjudging him and they start to make amends, which is the start of a beautiful relationship.
I think Mewtwo would be the most fascinating for Naruto to talk to. Mewtwo is a very intelligent and powerful Pokemon. It has complex thoughts about its existence and purpose. Naruto, with his own struggles and growth in the ninja world, could have deep philosophical discussions with Mewtwo. They could exchange ideas about power, identity, and what it means to be different in their respective worlds.
Perhaps it's related to his connection with the Nine - Tailed Fox. In the original Naruto story, he has a strong bond with the Nine - Tailed Fox. In the fanfic, this bond could have evolved in a way that allows him to summon foxes. It could be a manifestation of the latent power within him that he finally manages to tap into and use to summon these fox - like creatures.
The ability to summon foxes might make Naruto more of a target. Villains would be interested in his new power. This could lead to more dangerous and complex storylines as Naruto has to not only protect himself but also the foxes he summons. It could also lead to new alliances as other characters see the potential of the foxes in the fight against common enemies.
Naruto might develop a more wild and instinctual side. Since he is raised by foxes, he could be more in tune with his animal instincts. For example, he may be quicker to react based on his gut feelings rather than overthinking like a normal human would.
One interesting plotline could be Naruto's unique relationship with the foxes. Maybe he learns special skills from them that are different from the regular ninja techniques. For example, he might gain an acute sense of smell or the ability to move stealthily in the forest like a fox.
Well, it could change the plot in many ways. For example, he might get some crucial information from the dead. Maybe he could learn some long - lost jutsu from a dead ninja master, which would make him stronger and help him in battles. Also, he could get some secrets about the Akatsuki's plans from their deceased members, which would give Konoha an advantage.
It might change his relationships. He could communicate with the ghosts of fallen comrades or enemies. This would give him a unique perspective. Maybe he could understand the motives of former villains better and find ways to prevent future conflicts. Also, it could make his bonds with his living friends even stronger as he shares what he learns from the ghosts.
In such a fanfiction, Naruto might use his ninja skills to help Pokemon in battles. For example, he could use his shadow clone jutsu to confuse the opponents of a Pokemon. He could also communicate with Pokemon to understand their problems and help them find solutions. Maybe he would team up with Pikachu and use his Rasengan combined with Pikachu's thunderbolt for a super powerful attack.
Maybe it's his father, Minato. Minato has a lot of things to tell Naruto, like more about the Uzumaki clan and how to better use the power of the Nine - Tails. And as his father, their connection is very strong, so it's quite possible that he is among the first dead Naruto talks to.