An alien race that is highly intelligent but physically weak. They see Naruto as a powerful protector. In return for Naruto's protection, they offer him their advanced technology which could be crucial in his journey back to his world. For example, they might give him a device that can create wormholes to different parts of the universe.
The other members of Team 7 like Sakura and Kakashi could also be his allies. Sakura could use her medical ninjutsu to heal any injuries Naruto and the team get in space battles. Kakashi could offer his wisdom and combat experience, guiding Naruto in this new and unfamiliar space - filled adventure.
He could meet some space - faring ninjas who have adapted to the space environment. They might have unique chakra powers related to the cosmos.
An ancient and powerful wizard from a magical dimension could be an unexpected ally. Nightwing stumbles upon the wizard's lair while dimension - traveling. The wizard sees that Nightwing has a pure heart and decides to help him. The wizard uses his magic to guide Nightwing through the dangerous aspects of different dimensions and also helps him unlock new powers within himself that he didn't know he had.
Sasuke could potentially be an ally. Even though they've had their differences, Sasuke might understand Naruto's situation and decide to help him. Also, some of the Jinchuriki he's met before could be allies. They might see Naruto as one of their own and support him during his exile.
Even characters from other villages could potentially be allies. For example, Gaara. In the game world, he and Naruto could form a powerful duo, with Gaara's sand - based attacks complementing Naruto's Rasengan - like moves. They could fight together against common in - game threats.
In this fanfiction, Naruto might find Tiny Tina's love for chaos and destruction a bit overwhelming at first. But he would soon realize that her wild nature can be an asset. For example, when they are facing a horde of enemies, Tiny Tina could create a distraction with her crazy antics while Naruto slips in unnoticed to take out the leaders. It would be a story of two very different characters learning to work together and becoming friends in the process.
Yes, they could be unlikely allies. Naruto's superhuman abilities from being a ninja and Jessica's detective skills and super strength could combine in a unique way. Maybe Naruto needs help finding a missing person in Jessica's world, and she enlists his help because of his tracking skills. Together, they would make a formidable team.
There are no official stories of Naruto and Erza having a relationship as they are from different anime universes. However, in fanfiction, it could be an interesting concept. If we were to imagine, perhaps a crossover magic or some sort of interdimensional event could bring them together, leading to this unexpected pregnancy situation. But this is all in the realm of creative fanfiction writing.
I think Hinata could be an ally. She has always been in love with Naruto and would not stand by while he is in danger from Dark Naruto. Additionally, Shikamaru is smart and strategic. He might see the threat of Dark Naruto to the village and decide to assist Naruto, using his intelligence to come up with battle plans.
Maybe Kurama, the nine - tailed fox inside Naruto, could be an unexpected ally in a new way. Since they have a bond, Kurama could provide Naruto with extra power and insights when dealing with time - related challenges. For example, Kurama might have some ancient knowledge about the flow of time that could help Naruto in his time - patrolling duties.