Perhaps Naruto would meet other jinchuriki in his travels around the world. They share a unique bond as they are all hosts of tailed beasts. Together, they could support each other, exchange experiences about living with the beasts inside them, and become great friends in the process.
He could make allies with versions of his own friends from different universes. For instance, a super intelligent Shikamaru from a high - tech universe. Also, Naruto might team up with powerful warriors from universes where the concept of chakra doesn't exist but they have their own forms of energy. Another potential ally could be a female version of himself who has different skills and a unique perspective.
He could meet a young and talented ninja who has a different style of fighting. This new friend could teach Naruto some new moves.
He could make friends with a young herbalist. This person might live in the forest outside Konoha and know a great deal about medicinal plants. They could help Naruto when he gets injured during his travels and in return, Naruto could protect them from wild animals or other threats.
He could make allies with the local magic users if the universe he travels to has a magic system. They might be intrigued by his ninja abilities and see the potential in working together.
Naruto could befriend Neville Longbottom. Neville has his own journey of growing stronger, and Naruto, with his immortality and vast experience, could inspire him further. Luna Lovegood might also be drawn to Naruto because of his other - worldly presence. She could find his ninja skills and his different way of life very interesting. And of course, the Weasley twins. They would be excited to learn about Naruto's pranks and ninja tricks, and might even collaborate with him on some new and crazy schemes at Hogwarts.
There might be an old sage living in the mountains of one of the elemental nations. The sage has vast knowledge of ancient ninja arts and has been in isolation for years. Naruto's encounter with this sage could be a turning point in his journey, as the sage could offer him wisdom and perhaps even a new form of power or training method.
Maybe there are noble knights in the new world who recognize Naruto's courage and strength. They could form an alliance with him, with Naruto teaching them some stealth and speed techniques from his ninja training, and in return, the knights could offer him protection and knowledge about the new world's politics and social structures. Another potential ally could be a group of outcasts or rebels in the new world. They might be fighting against an unjust regime, and Naruto, with his sense of justice, would naturally side with them. Together, they could plan strategies to overthrow the oppressors, using Naruto's unique skills and the rebels' knowledge of the local terrain and the weaknesses of the regime.
He could meet alternate versions of his friends. For instance, an alternate Sasuke who has never left the village and is a strong ally from the start. This Sasuke could be more open and friendly, and together they could face the challenges of the new universe.
One potential ally could be the younger versions of his existing friends like Sasuke. Even though Sasuke in the past may not be as developed as in Naruto's original timeline, Naruto could still see the potential in him and form an alliance early on.
He could make friends with a wizard from Australia who has a special ability to communicate with animals native to the Outback.