In a Pokemon crossover Naruto fanfiction, a cool storyline might be that the tailed beasts are actually related to certain powerful Pokémon. For instance, the Nine - Tailed Fox could be related to an Arcanine in some ancient way. This could lead to a whole exploration of the origins of both the tailed beasts and Pokémon. Also, Pokémon could be used to teach the ninja new skills. A Ditto could be used to help ninjas learn how to transform more effectively, since Ditto can transform into any other Pokémon or object it has seen.
One interesting storyline could be where Pokémon trainers from the Pokémon world end up in the Naruto universe. They might use their Pokémon to help in battles against the Akatsuki. For example, a Pikachu could use its electric attacks to counter some of the Akatsuki's jutsu that involve lightning - based defenses. Another could be Pokémon being used in the Chunin Exams, adding a whole new level of chaos and excitement.
One interesting storyline could be that the Glee characters end up in the Pokemon world. They could form a Pokemon performance troupe. For example, Rachel could be a trainer who uses singing to boost her Pokemon's power during battles. Finn might be more into the physical aspects of Pokemon training, like competing in Pokemon athletics. Another idea is that the Pokemon themselves could have musical abilities and they join the Glee club in a special Pokemon - human co - existing world.
One interesting storyline could be that Naruto and his friends somehow end up in the Voltron universe. They might team up with the Voltron paladins to fight a common enemy. Naruto's ninja skills could add a new dimension to the battles. For example, his shadow clone jutsu could be used to create diversions during a fight against a large Galra force.
In some 'naruto is a father crossover fanfiction', there could be a storyline where Naruto is a father in a crossover with the Harry Potter world. His child could be a student at Hogwarts, and Naruto, with his experience of being a hero, tries to understand the magic world and protect his child from the dark forces. Maybe he uses his chakra in unique ways within the magical environment.
One interesting storyline could be Naruto characters being transported to the RWBY world. For example, Naruto himself could end up at Beacon Academy. He might struggle at first to understand the concept of Dust and how the Grimm work. But his skills in ninjutsu could be a great asset in fighting the Grimm. Another storyline could involve RWBY characters going to the Naruto world. Ruby, with her scythe skills, could learn some ninja techniques and use them in combination with her own fighting style. Weiss might be intrigued by the different forms of chakra control and try to incorporate it into her Glyph magic.
A more complex storyline could involve a threat to both the Naruto and Cars universes. Naruto and his friends team up with the Cars characters to fight against a common enemy. Maybe an evil ninja has found a way to control the Cars and is using them for his own malicious purposes. Naruto would then have to use his ninja wisdom and the Cars' unique abilities to stop this threat.
Well, a cool plot could be a fusion of the two power systems. Imagine if ninjas in the Naruto world could learn some of the magic from Overlord. It would completely change the balance of power. Or perhaps the Akatsuki organization teams up with some of the villains in Overlord to take over both worlds. They could combine their resources and knowledge to create a really powerful and evil force. Also, there could be a story where a character from Naruto, like Sasuke, tries to master the power of the Overlord world to become even stronger and seek revenge in a new way.
In a Pokemon and Naruto crossover fanfiction, there could be a tournament where both Pokemon trainers and ninjas participate. The ninjas would use their jutsu and the trainers their Pokemon. It would be interesting to see how Naruto's Rasengan would compare to a powerful Pokemon move like Hyper Beam. And perhaps some Pokemon could learn to use jutsu from the ninjas they befriend, creating a whole new dynamic in the story.
One possible storyline could be that Naruto finds himself in the Pokemon world and meets Serena. They could team up to compete in Pokemon battles. Maybe Naruto's ninja skills give him an edge in strategizing during battles, and Serena teaches him about the nuances of Pokemon training.
One possible storyline could be Naruto and Pikachu forming an unexpected bond. Maybe Pikachu helps Naruto during a difficult battle in the Naruto world using its electric powers. Another could be Naruto traveling to the Pokemon world and learning about the different Pokemon types and how they interact with each other.
One interesting storyline could be that Naruto and his friends are transported to the Monster High world. They could team up with the Monster High characters to face a common threat. For example, a powerful demon that is causing chaos in both the Ninja world and the Monster High world. Another could be a cultural exchange where Naruto shows the Monster High students his ninja skills and they in turn show him their unique monster abilities.