One idea could be Naruto traveling to a dimension where ninjutsu doesn't exist, and he has to rely solely on his physical strength and strategic thinking to survive. Another could be a dimension filled with powerful, ancient beasts that Naruto must befriend or defeat. Maybe he travels to a dimension where everyone has a unique kekkei genkai that he has to learn to co - exist with.
In a 'naruto travel dimensions fanfiction', Naruto might journey to a dimension that is a utopia. However, he soon discovers that this utopia is built on the oppression of a certain group. He then decides to fight for their rights. Another plot could involve Naruto traveling to a dimension where time moves at a different pace. He might get stuck there for what seems like a short time in that dimension but is actually years in his own world. He has to find a way to get back while dealing with the consequences of the time difference.
One interesting plot idea could be that Naruto is transported to an altered dimension where the shinobi world has different power structures. For example, the Hidden Villages might be ruled by different clans or there could be new types of jutsu. Another idea could be that the Akatsuki in this altered dimension has a different goal, perhaps they are trying to restore balance instead of causing chaos. Also, Naruto could find that his friends have different personalities or abilities in this new dimension, which would create a lot of interesting interactions and challenges for him to overcome.
One possible plot could be that Naruto and Naruko accidentally stumble upon a powerful jutsu or a strange artifact that opens a portal to different dimensions. In each dimension, they face unique challenges. For example, in a dimension where ninjas have different powers, they might have to learn new fighting styles to survive. They could also meet alternate versions of their friends and enemies, which would lead to interesting interactions and character development.
One interesting plot could be Naruto traveling to a dimension where the Akatsuki are the heroes. It would be a complete role - reversal, and Naruto would have to figure out how to interact with them. Another could be a dimension where everyone has a different type of chakra, like water - based chakra for all shinobi, and Naruto has to adapt his skills.
Well, a really cool plot could be that Harry travels to a dimension where the wizarding world is merged with the Muggle world in a very chaotic way. He has to figure out how to keep the balance. Also, he might end up in a dimension where the Marauders are still alive and he gets to interact with them, which would be a great story of friendship and adventure. And there could be a dimension where magic is based on emotions and Harry has to learn to control his feelings to use magic effectively.
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.
One idea could be exploring different versions of the characters from parallel dimensions. For example, a dimension where Ruby has ice powers instead of her normal speed-based powers. Another could be a dimension where the Grimm are the dominant species and the Huntsmen and Huntresses are in hiding. Maybe also a dimension where the technology is far more advanced and they use mech - suits to fight the Grimm.
A cool plot could be that there is a time - traveling aspect. A new villain travels back in time to change the events of 'Dark Side of Dimensions' in order to gain ultimate power. Yugi and his friends then have to follow the villain back in time and stop them. This would involve them having to navigate the past, deal with younger versions of themselves and their friends, and make sure that history doesn't get completely rewritten in a way that destroys their present world.
One idea could be that Naruto travels back in time and gets adopted by a different clan. For example, the Uchiha clan. This would change his whole upbringing and how he views the world. He might learn different jutsus earlier and have a different relationship with Sasuke.
A cool plot idea could be Minato traveling back to his own childhood. He could then use his future knowledge to train himself more effectively, making himself an even more powerful shinobi at a younger age. This would have a huge impact on the future of the Leaf Village as he would be able to better protect it earlier. He might also be able to prevent some of the early tragedies that happened in the village.
One idea could be Tobirama traveling to the future and seeing how his village has developed. He might be shocked by the new technology and the different ninja techniques. Another plot could involve Tobirama going back in time to change a crucial event in Naruto's past, like preventing the Uchiha massacre. Or perhaps he travels to a different timeline altogether and has to find a way back while dealing with that timeline's unique challenges.