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.
Well, think about the transformation abilities in Naruto. In a Gundam x Naruto fanfiction, a character like Gaara could use his sand powers to create a protective shield around a Gundam. Or a character with the ability to transform into an animal - like form could use that form to enhance the Gundam's mobility. For example, Kiba could transform into his wolf form and use his enhanced speed and senses to pilot the Gundam more effectively, perhaps making it faster and more responsive.
In such a fanfiction, the chakra control abilities of Naruto characters can play a significant role. For instance, Naruto's ability to use large amounts of chakra could be used to power up a Gundam in a unique way. The Byakugan's long - range vision could be used to give a Gundam an extended sensor range. And characters like Sakura with her superhuman strength could help in physical repairs or modifications of the Gundam during combat situations.
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.
Characters can be integrated by having Naruto and his friends visit the League of Legends world. They could meet champions like Ashe and learn about her archery skills, which Naruto might find interesting as he has his own ranged attacks. Also, LoL characters could visit Konoha and be amazed by the ninja techniques.
Naruto's immortality can have a huge impact. He can take more risks in battles involving Gundams. For instance, he could sacrifice himself to save a Gundam pilot knowing he'll come back. His ninja skills like teleportation (body flicker) could be used to quickly move around Gundams during combat, which would be a new and unexpected tactic in the Gundam universe.
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.
If you become a dog in this Naruto fanfiction, your sense of smell can be a huge asset. You could use it to track down missing ninjas. For instance, when Sasuke leaves the village, your dog -character could pick up his scent and follow it. This would create a new sub -plot where you try to convince Sasuke to come back. Your animal ability to smell emotions in a way could also be used. You might be able to sense Sasuke's inner turmoil and use that knowledge to try and reach him on an emotional level.
Tracer's ability to blink and rewind time can be used for some exciting action sequences. For example, she could use it to save Widowmaker from a dangerous situation just in the nick of time. This would not only show her loyalty but also her unique skills. Widowmaker's sniper skills could be used for strategic moments. Maybe they are in a high - stakes standoff and Widowmaker has to take out a key target from a long distance to ensure their escape.
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's ability to create shadow clones could combine with a mutant's telepathy. For example, he could send his clones to different locations and the telepathic mutant could communicate with each of them simultaneously, gathering information from all over. This would be a great way to gather intelligence or set up strategic attacks.
The Akatsuki members in Naruto could also be incorporated. For example, they could be after the corpse bride for her unique chakra or some hidden secret she holds. Naruto would then have to protect her while also trying to find a way to return her to peace. Each Akatsuki member would bring their own set of skills and motives, adding more complexity to the fanfiction story.
If we consider Naruto x Diablo fanfiction, Naruto's ability to create shadow clones could be a huge advantage in the Diablo world. He could send his clones to scout areas filled with demons. As for Diablo characters in the Naruto world, the Barbarian's strength could be comparable to Tsunade's superhuman strength. The Sorceress' magic would be like a new form of chakra - based jutsu that the ninjas have never seen before. They would have to adapt and learn from each other's abilities.