One possible fanfiction could be about Naruko traveling to different dimensions in the Naruto universe and meeting alternate versions of her friends and enemies. She might learn new jutsus or gain unique powers from these encounters.
One great 'Dimension Travel Naruto Fanfiction' is 'A New Path in Another World'. In this fic, Naruto gets transported to a different dimension where the ninja world has some unique and strange rules. It's really interesting to see how he adapts his skills to this new environment.
One interesting Naruto immortal dimension travel fanfiction could be 'Journey Beyond the Known Realm'. In it, Naruto discovers a hidden portal that leads to an immortal dimension. There, he meets ancient beings who teach him new jutsu. It's a great read for those who love exploring new concepts in the Naruto universe.
In a Juubi dimension travel fanfiction, Naruto could be on a mission to stop an enemy who has opened a portal to the Juubi dimension. As he enters, he realizes that the laws of nature are completely different. His chakra abilities are either enhanced or restricted. He teams up with a native of the dimension who teaches him how to navigate and use the energy of the Juubi dimension to his advantage. Eventually, he manages to close the portal and save both his world and the Juubi dimension from destruction.
One great 'Naruto Dimension Travel Crossover Fanfiction' is 'Naruto in the Marvel Universe'. In this story, Naruto is transported to the Marvel world. He brings his unique ninja skills and chakra system, which creates interesting interactions with the superheroes there. His ability to use shadow clones, for example, surprises many characters. Another good one is 'Naruto and the World of Harry Potter'. Here, Naruto enters the magical world of Hogwarts. His combat skills are quite different from magic, yet he finds ways to adapt and even teaches some of the students about his ninja way.
Well, in some Naruto fanfictions about dimension travel, Naruto might end up in a dimension where the tailed beasts are the dominant species. He then has to figure out how to communicate with them and maybe even form alliances. Or he could travel to a dimension where there is no chakra, and he has to learn new forms of power to survive and find his way back.
Another concept could be Naruto having to adapt to different power systems in the dimensions he travels to. Maybe in one dimension, physical strength is more important than chakra control, and he has to learn new fighting styles to survive.
One reason is that it gives a chance to explore different versions of Naruto's story. In dimension travel fanfics, we might see Naruto in a dimension where he has different powers or where the Akatsuki are good guys. This novelty and the exploration of 'what - if' scenarios are very appealing to fans.
Hinata might show up as well. Her relationship with Naruto can develop in new ways in different dimensions. For instance, in a dimension where Naruto is in a more dangerous situation, Hinata's love and support could be a key factor in his journey.
Even Naruto himself could be the main character in a dimension - travel fanfiction. He could be sent to different dimensions to spread his message of peace and friendship, and in the process, face new challenges and enemies that test his resolve and his newfound powers.