Sometimes he meets powerful beings who rule over the dimensions. For example, a dimension - lord who has the power to manipulate the very fabric of that dimension. Naruto has to negotiate with or fight against such characters to continue his journey.
He often meets versions of himself from different dimensions. These other Narutos might have different personalities or abilities due to the differences in their respective dimensions.
There could be characters who are similar to his friends in his own dimension but with different backstories. Like a Sasuke who is a peaceful scholar instead of a vengeful ninja. Meeting these characters makes Naruto reflect on his own relationships and the nature of his world.
It could be some powerful dimension - hopping villains who want to use the power of different dimensions for their own evil purposes. They might see Naruto and Naruko as threats to their plans.
One possibility is that Naruto and Naruko are on a mission to save the multiverse in this fanfiction. They travel through dimensions to collect some special artifacts or powers that are scattered across different realities. Along the way, they might face challenges from the rulers of those dimensions who don't want them to take those things. This could involve epic battles and the forging of new alliances as they strive to complete their mission.
Perhaps Naruto travels to a dimension where everyone has a unique animal spirit companion. He has to bond with one of these spirits to gain access to certain powers. This would be a whole new experience for him as he's used to his own ninja world and its rules.
Sasuke is often a common character. He might be initially suspicious of Female Naruto, thinking she could be a threat to Naruto or the village. But as the story progresses, he could end up being an ally and even help in their adventures.
Teamwork is also a big theme. Despite being the same person in essence, the two Narutos often have to learn to work together. This can be challenging as they may have different personalities due to their different experiences. For example, one Naruto might be more cautious while the other is more impulsive. And the theme of friendship also plays a role, as they are, in a way, their own best friends in these stories.
For other characters like Sasuke, in 'Naruto ADHD fanfiction', his relationship with Naruto can change. If Naruto has ADHD, Sasuke might have to be more patient and understanding. This can add a new layer to their dynamic. Also, Sakura might take on a more nurturing role towards Naruto, which is different from her usual tough - love approach in the original series. It shows how the presence of ADHD in Naruto can reshape the interactions between all the characters.
Well, he might visit the dimension of the Sharingan's origin, where he could learn more about the Uchiha clan's secrets. Another could be a dimension full of powerful beasts, much stronger than the tailed beasts in his own world. And there could also be a dimension of pure chakra, where he can train and enhance his chakra control to an extreme level.
It could be the First Hokage, Hashirama. Naruto would be amazed by his powerful Wood - Style jutsu and his ability to create the village. He could learn about the original ideals behind the Hidden Leaf from Hashirama.
Growth and development is also a theme. Himawari might start the fanfiction as a bit of a naive or inexperienced girl, but through her interactions with Naruto, she grows in confidence, skill, and understanding of the ninja world.
In these fanfictions, a major theme is growth. Naruto's growth as a ninja and a person can be greatly enhanced by his interaction with Minato. They might also explore the theme of legacy. Minato left behind a great legacy, and Naruto could learn more about it and how to uphold it. Additionally, the theme of forgiveness might be present, as Naruto may need to forgive Minato for not being in his life, and Minato may need to forgive himself.