Yes, in fanfiction, Naruto can often be depicted as being able to copy kekkei genkai. Fanfiction writers like to explore the idea of Naruto's already powerful abilities expanding to include this. It adds an interesting twist to his character and the Naruto universe as a whole.
In fanfiction, it's often through some sort of enhanced version of his Rasengan training. His ability to sense and understand chakra on a deep level allows him to mimic the kekkei genkai.
Power and growth are common themes. Characters often use the copied kekkei genkai to become stronger and overcome challenges. Another theme is identity. They might struggle with who they are now that they have this new ability.
Well, it could be something like a fire - based kekkei genkai that allows Naruto to control blue - flame fire which is hotter than normal fire. This would give him an edge in battles and also a new look to his fighting style.
It could be a water - based kekkei genkai. Since the Wave arc has a lot to do with water, it would make sense for Naruto to awaken a kekkei genkai related to water. This could give him an edge in battles, especially in the Wave region where water is abundant.
One interesting 'naruto copy kekkei genkai fanfiction' could be those where the main character discovers a new way to use a copied kekkei genkai. For example, in some fanfictions, a character might copy the Byakugan and then combine it with their own unique chakra nature to create a whole new ability. Another good one could be about a character from a different village who copies a kekkei genkai from Konoha and has to deal with the political implications of it back in their own village. There are also fanfictions where a character copies a kekkei genkai and uses it to train a new generation of ninjas in a unique way.
Well, in some fanfictions, Naruto might obtain all kekkei genkai through some sort of ancient and powerful jutsu. Maybe he discovers a hidden scroll or meets a mysterious sage who imparts this power to him.
Having a kekkei genkai in fanfiction could completely transform Naruto's journey. It might unlock hidden potential within him, affect his relationships with other characters, and introduce new conflicts and resolutions that weren't present in the original storyline.
In fanfiction, it could be due to some special training. Maybe he meets a super powerful mentor who has knowledge of all kekkei genkai and teaches him the secrets. Or perhaps he discovers some ancient jutsu that unlocks this ability within him.
One common combination is the Sharingan and the Rasengan. The Sharingan's ability to analyze and predict movements can be really useful when Naruto is forming and launching a Rasengan. Another could be the Byakugan and Sage Mode. With the Byakugan's enhanced vision, he can better sense the chakra flow around him in Sage Mode, making his attacks more precise. Also, sometimes you see him with the Ice Release along with his regular Wind Release. He could then create ice - infused wind attacks that are both cold and sharp.