In a 'Naruto x Dynasty Warriors' fanfic, the most powerful character might be someone unexpected. For example, Kakashi Hatake has his Sharingan and a wide variety of jutsu at his disposal. He's also a very intelligent and experienced fighter. On the Dynasty Warriors side, Zhou Yu is a brilliant strategist and a capable fighter. But if we look at the combination of powers from both universes, a character like Obito Uchiha with his Kamui ability could be extremely powerful. He could use his space - time ninjutsu to surprise his opponents from the Dynasty Warriors world, who may not be used to such abilities.
I think Sasuke could be one of the most powerful in a 'Naruto x Dynasty Warriors' fanfic. His Sharingan allows him to copy and predict his opponents' moves, and his Lightning - Style jutsu are very powerful. But when you consider the Dynasty Warriors characters, Cao Cao is a great strategist and a powerful fighter. He could use his intelligence to outwit the Naruto characters and his combat skills to hold his own in battle. So it really depends on how you define 'powerful' - whether it's raw strength, strategic thinking, or a combination of both.
Lu Bu from Dynasty Warriors is also a strong contender. He is known for his incredible strength and combat skills in his own universe. In a crossover, if he were to gain some ninja - like abilities or be able to use chakra, he would be extremely powerful. His brute force combined with new abilities could make him a top - tier character.
It's hard to say for sure, but Naruto in his Sage of Six Paths mode would be extremely powerful. He has incredible chakra reserves and can use a wide variety of powerful jutsu. However, Lu Bu from Dynasty Warriors is also a force to be reckoned with. He's known for his insane strength and combat skills. So it could be a toss - up between them, depending on the situation and the environment of the battle.
It's hard to say. Naruto has his powerful ninjutsu and sage mode. But someone like Jean Grey with her telepathic and telekinetic powers at their peak could be extremely formidable. If she could get into Naruto's mind, she might be able to disrupt his chakra control.
It could be Master Chief if he got access to Naruto's chakra. He's already a super - soldier, and with chakra, he could become even more powerful. He could use chakra to enhance his already amazing physical abilities and his combat skills with the various Halo weapons.
In a 'Naruto x Terminator' fanfiction, it's actually hard to say who would be the most powerful. If we consider someone like Sasuke, he has the Sharingan and Rinnegan, which give him powerful visual abilities and the ability to use a variety of jutsu. Against the Terminators, he could use his Amaterasu to burn them. But on the other hand, the Terminators have their own advantages like advanced weaponry and time - travel capabilities. So it really depends on the situation and how the writer wants to play out the story.
It's hard to say for sure. Naruto has his massive chakra reserves and the ability to use powerful jutsu like the Rasengan and Sage Mode. But in the Destiny universe, characters like the Guardians have access to advanced weaponry and the power of the Light. If they could combine their powers, they would be extremely formidable. However, if we consider raw power, Naruto in his Six Paths Sage Mode could be a top contender as he has god - like powers in that form.
I think Qrow could be really powerful in a RWBY x Naruto fanfusion. He has his own set of skills and if he were to learn some of the more powerful jutsu from Naruto, like the Rasengan or some of the more advanced sealing techniques. His experience as a Huntsman and his natural combat abilities would be enhanced greatly. And Weiss with her Glyphs and if she were to learn some chakra - based techniques could also be a very powerful combination.
It could be Naruto in his Nine - Tails Chakra Mode. He has immense power and speed, which would give him an edge in the Smash Bros battles.
It's hard to say for sure, but Naruto could be a very powerful character. His ability to use chakra and his vast array of ninja techniques like the Rasengan and Shadow Clone Jutsu would give him an edge. However, in the RWBY world, characters like Ruby with her Silver - Eyed Warrior powers also have great potential.
However, Jin Kazama from Tekken also has a strong claim. He has the Devil Gene which gives him enhanced abilities. He can transform into a more powerful form and has years of martial arts training. If he could somehow learn to control Naruto's chakra or ninja techniques, he could become extremely powerful. In a Tekken Naruto fanfic, it might depend on how the powers are combined and who has the better strategy in a fight.