Naruto's chakra system could be related to the magic system in Fire Emblem. His large chakra reserves might be equivalent to a character having high magic stats. In fanfiction, he could use his chakra to enhance weapons or perform unique magic attacks that are a blend of Naruto's jutsu and Fire Emblem magic.
One way could be Naruto's ninjutsu skills being translated into unique combat arts. For example, his Shadow Clone Jutsu could be a special ability that creates temporary clones to distract enemies in battle, similar to how some Fire Emblem characters have skills to create decoys.
Another storyline could be that Naruto is summoned to Tellius by a powerful mage who mistakes him for a legendary hero. Naruto then has to live up to this expectation while also dealing with the cultural differences. He could introduce new combat techniques to the Tellius armies and help turn the tide in a great war.
One way could be through some kind of magical transfer. Maybe a powerful wizard or a deity from a different realm decides to bestow Odin's power upon Naruto. His Sharingan (if he had one) could be enhanced with Odin - like powers, such as the ability to see the truth in all things. Or his Sage Mode could be combined with Odin's power to give him a unique form of combat ability.
Naruto's ability to use chakra could be related to the magic in Rias' world. For example, his chakra control might help in more precise magic casting. His Shadow Clone Jutsu could be used for various strategic purposes, like scouting or overwhelming enemies in battle. And his Rasengan could be modified with the magic elements present in Rias' world to create a new and powerful attack.
Naruto could use his godlike speed to catch up with Inuyasha's fast - paced battles. His ability to sense danger could help the group avoid traps set by demons.
First, you need to understand the worlds of both Fire Emblem Awakening and Naruto. Know the characters, their abilities, and the settings. For example, in Naruto, the concept of chakra is central, while in Fire Emblem Awakening, the class system and weapon triangle are important. Then, come up with an interesting plot that combines elements from both. It could be a story where a character from one world is teleported to the other.
Naruto's speed and agility can be integrated by making him an exceptional pilot. His quick reflexes would allow him to dodge attacks and make split - second decisions in the Armored Core battles. For example, his ability to run up trees and walls in the Naruto world could translate to his mecha being able to perform acrobatic maneuvers in the air or on rough terrains in the Armored Core setting.
The sharingan ability from Naruto could be integrated into a Gundam x Naruto fanfiction by having a character use it to enhance the Gundam's targeting system. For example, Kakashi could be a Gundam pilot and use his sharingan to quickly analyze enemy movements and weaknesses. The rasengan could also be a part of it. Maybe a character could create a Gundam - sized rasengan as a special attack.
One way could be by having Naruto's ninja skills translate into the GTA 5 world. For example, his ability to run fast and jump high could be like a special ability in the game. He could use his shadow clone jutsu to confuse enemies during heists or missions. Maybe he'd team up with some of the GTA 5 characters and teach them his ninja ways. This would add a whole new dynamic to the GTA 5 gameplay and story.
Naruto's speed could be translated as an advantage in Pokemon battles. He could quickly move around the battlefield to avoid attacks or get into a better position to throw a Pokeball. His stamina would also be useful, allowing him to endure long battles or long journeys in the Pokemon world in search of rare Pokemon.
Naruto's chakra could be seen as a new type of energy source within the peerage. His shadow clones, for instance, could be used for various purposes like scouting or creating distractions during battles. The Rasengan might be adapted to work against enemies with different magical defenses.