He would definitely still have his chakra powers. His ability to create shadow clones would be a great asset. Also, his sage mode, if he could access it, would give him enhanced strength, speed, and sensory abilities in the DxD world.
He could still have his chakra - based powers. His Rasengan, for example, would be a powerful attack. And with his heightened senses, he might be able to detect and counter attacks more quickly. He could also develop new techniques that rely on his other senses, like a sound - based jutsu that can stun opponents.
He would bring his chakra powers for sure. His ability to use jutsus like Rasengan would be a powerful addition. Also, his enhanced physical abilities due to being a demigod, like super strength and speed, would make him a formidable opponent in the DxD battles.
Devil Naruto might possess the power of flight, which is common among devils in Highschool DxD. His chakra could be infused with devil energy, making his jutsus more powerful and having additional effects like draining the opponent's energy. His shadow clones could also be enhanced to have some devil - like characteristics, such as being able to resist certain types of attacks better.
In a Sharingan Naruto Highschool DxD fanfiction, the Sharingan could also play a role in terms of illusions. Imagine a scenario where the character uses Sharingan - based illusions to deceive the enemies from both worlds. They could make a Highschool DxD devil believe they are in a completely different environment like a dangerous Naruto - style forest filled with traps. And for Naruto characters, they could be made to see illusions of their worst nightmares or false threats from the Highschool DxD world, which would make for some really intense and engaging storylines.
He would probably have Naruto's regular ninja powers like the rasengan and shadow clones. But combined with his Azazel heritage, he might also have some unique fallen - angel - like abilities. Maybe he could fly or have some sort of dark energy - based attack.
If Naruto entered Highschool DxD with mokuton powers, it would be a wild ride. His powers would make him a target for some who want to use his abilities for their own gain. But Naruto being Naruto, he would make friends with the good - hearted characters. He could teach them about his ninja ways and learn about their magic and devil powers in return. His mokuton would also allow him to create unique training areas for himself and his new friends to get stronger.
Naruto's chakra - based powers and Ophis's dragon powers could combine in a very explosive way. For example, Naruto could use his Rasengan and infuse it with Ophis's dragon energy to create a super - powered attack that could break through almost any defense.
He could have the power of the Ouroboros, which might give him the ability to manipulate energy in ways unique to the Highschool DxD world. Maybe he can create powerful energy shields or attacks.
Cloud has his iconic Buster Sword skills. In a Highschool DxD fanfiction, these could be translated into a very powerful physical attack ability, perhaps even on par with some of the high - level sacred gears. His speed and agility in combat would also be a great addition, allowing him to quickly move around the battlefield.
He would be a very protective father. Given Naruto's own experiences growing up without parents and his strong will to protect his loved ones, he would be extremely vigilant in safeguarding his family in the Highschool DxD fanfiction.