Naruto's ninjutsu skills in general could bring a whole new dynamic to the Kalos region. He could use his transformation jutsu to disguise himself and infiltrate evil organizations. His summoning jutsu could also be interesting. What if he could summon Pokémon instead of the usual toads? It would be a really exciting twist in the fanfiction.
Naruto's speed and agility from his ninja training would be very useful in the Hellsing world. He could easily dodge attacks from vampires and other creatures. His ability to use chakra to enhance his physical strength means he could hold his own in close - combat situations. For example, he could punch a vampire hard enough to send it flying. Also, his summoning jutsu could bring in some interesting allies to help the Hellsing team in their battles.
In a fanfiction, Naruto's abilities would both clash and blend with Hogwarts' magic. His speed and agility from ninja training would make him stand out in physical challenges like Quidditch. His ability to summon animals could be related to the magic of summoning in Hogwarts. However, his use of chakra is very different from the magic wand - based magic in Hogwarts, which would lead to some interesting learning experiences for him.
Well, Naruto's immortality would give him an edge. His ninja skills like shadow clones could be used for various tasks in Middle - earth. For example, he could send clones to scout out Mordor while the Fellowship tries to figure out a plan. His Rasengan might be a new and powerful weapon against the orcs and other dark forces. And his ability to endure and keep fighting without getting tired would be very useful in the long battles against Sauron's minions.
Her speed would be a great advantage. In Quidditch, she could easily outfly other players. And her ability to sense danger could help in the dark corridors of Hogwarts. Also, her physical strength might come in handy during duels or when dealing with magical creatures.
Naruto's ability to sense danger through his ninja skills could give the Jaegers an edge. In the world of the Jaegers, being able to anticipate the Kaiju's moves is crucial. Naruto could use his chakra sensing to detect the Kaiju's approach from a distance, even if they are hidden. His summoning jutsu could also be interesting. He could summon large toads to help in the fight, either to distract the Kaiju or to assist the Jaeger in some way, like providing a platform to jump from for a more powerful attack.
Well, Naruto has some amazing abilities. His Sage Mode gives him enhanced strength, speed, and sensory perception. If he were to join the Espada, this would make him a formidable opponent. His shadow clones could be used to confuse the Espada in battle. And his Rasengan, especially if he combines it with his other techniques, could be a real game - changer. Also, his ability to quickly learn new techniques might allow him to adapt some of the Espada - related powers to his own fighting style.
Naruto's chakra control could be seen as a form of magic in the Percy Jackson world. His ability to use jutsu like the Fireball Jutsu could be like a new type of spell. And his summoning jutsu might call upon some unique creatures that don't exist in the Percy Jackson universe.
Naruto's abilities would bring a whole new dynamic to the Highschool DxD universe. His ability to use chakra to walk on walls and water could give him an advantage in certain terrains or situations. In battles, his ability to sense chakra could help him detect hidden enemies. Also, his summoning jutsu could call upon powerful creatures from the Naruto universe. If these creatures were introduced into the Highschool DxD world, they could change the balance of power. And his various transformation jutsu could be used for disguise or to gain temporary boosts in power.
Naruto's Shadow Clone Jutsu would be a great asset. He could send out clones to gather intelligence or engage in multiple battles at once. His Rasengan could be a powerful offensive weapon against the droids or Sith. And his ability to sense chakra could potentially help him detect hidden enemies or sense the Force - users in a different way.
Naruto's rasengan could be a powerful offensive weapon in Sona's peerage. His speed and agility from being a ninja would also be useful in combat situations.