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's hard to say. Naruto has his powerful ninjutsu like the Sage Mode and the Nine - Tails chakra. But Salem has her own dark magic and immortality. If Naruto can figure out a way to counter Salem's immortality, he could be very powerful against her. However, in the RWBY world, characters like Ruby with her silver eyes power also have the potential to be extremely strong. So it really depends on how the story is written.
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.
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.
I think Weiss might be the most powerful. Given her intelligence and magical abilities in RWBY, she could easily understand the complex mechanics of Pokemon training and battles. Also, she could potentially use her Glyphs in creative ways to enhance her Pokemon's performance in battles.
I think Naruto Uzumaki combined with Ruby Rose could be extremely powerful. Naruto has his vast chakra reserves and powerful jutsu like the Rasengan. Ruby has her super - speed and the ability to use her scythe, Crescent Rose, with great skill. Together, they could be a force to be reckoned with. Naruto could use his clones to distract enemies while Ruby zooms in for the kill.
It could be Naruto himself if he fully utilizes the gamer abilities. With his already strong will and determination, combined with the ability to quickly level up and gain new skills from the gamer aspect, he could become extremely powerful. He has the potential to master all kinds of jutsu faster and use them more effectively in battles.
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.
Naruto has a strong case for being the most powerful. His Nine - Tails chakra mode makes him incredibly strong, fast, and durable. He also has a vast array of ninjutsu at his disposal. In a crossover, he could potentially learn to use Ichigo's reiatsu in some way, making him even more powerful. Plus, his never - give - up attitude could give him an edge in a tough battle against Ichigo.