It's hard to say for sure. Naruto in his Sage Mode or with the power of the Nine - Tails is extremely powerful. He has a vast amount of chakra and can perform powerful jutsus. However, Inuyasha with his Tessaiga, especially when it's in its upgraded forms, is also a force to be reckoned with. He has superhuman strength and speed, and the Tessaiga can cut through almost anything. But if we consider all aspects, Naruto might have an edge as he can use a wider variety of techniques and has more experience in large - scale battles.
Well, Kagome also has her own powers. Her spiritual arrows can purify demons and she has a connection to the Sacred Jewel. But compared to Naruto, her powers seem a bit more limited in terms of raw power output. Naruto has fought against some of the most powerful villains in his world. He has faced opponents who could destroy entire villages. Inuyasha and his comrades are strong in their own right in the feudal Japan setting, but Naruto's power level in his more advanced forms is just on a different scale. So, overall, Naruto would likely be the most powerful character in this crossover fanfiction.
Sesshomaru could also be a contender for the most powerful. He has incredible demonic powers, is extremely fast and strong, and his Bakusaiga is a very dangerous weapon. But when you look at Naruto's growth throughout the series, like when he mastered the power of the Six Paths. He has the ability to fly, sense danger from afar, and his attacks can cause massive destruction. So, in a crossover, Naruto's adaptability and ever - increasing power might make him the most powerful, though it would be a close fight against Sesshomaru or Inuyasha at their peaks.
Sesshomaru could also be a very powerful character in this crossover. He has his own powerful sword, Bakusaiga, and his inhuman strength and speed. He is very experienced in combat against demons. Compared to Naruto's friends like Sakura, Sesshomaru would likely be much more powerful in terms of raw strength and combat ability. But Sakura has her own medical ninjutsu and superhuman strength when she releases her inner power, which could also be useful in different situations.
It's a tough call, but it could be Light. If he manages to get his hands on the knowledge of the Inuyasha world and its rules, he could use the Death Note very effectively. He could target demons by learning their names, and since many demons in the Inuyasha world are vulnerable to human - like weaknesses in some ways, his strategic mind could make him a very powerful force. He could even manipulate some of the human characters in the Inuyasha world to do his bidding.
It could be Naruto in his Sage of Six Paths mode. He has incredible power, with the ability to fly, use various powerful jutsus, and his chakra is off the charts. In a fight against the characters from Toriko, his speed and strength would be very difficult to match.
In a naruto tekken crossover fanfiction, I think Orochimaru could be a very powerful character. He has the ability to use various snake - based jutsu and is a master of deception. He could potentially use his skills to outwit Tekken characters. But on the Tekken side, characters like Heihachi Mishima with his Mishima - style karate and his decades of fighting experience would also be a formidable force. It really depends on the environment and the nature of the encounter.
It's likely Naruto himself. His ability to create countless shadow clones gives him a huge advantage in battle. He can overwhelm opponents with sheer numbers. Also, his rasengan is a very powerful attack. In the Castlevania world filled with vampires and demons, he could quickly adapt his skills to take on these new foes.
It's really hard to say. Goku has the ability to reach extremely high power levels and transform into powerful forms like Super Saiyan God. However, Naruto has the Nine - Tails' chakra and the power of the Sage of Six Paths. If they were to combine their powers, they would be extremely formidable. But if we had to choose just one, it might be Goku in his Ultra Instinct form as his speed and power seem almost limitless compared to what we've seen in the Naruto universe so far.
It could be Naruto. His ability to use chakra and his vast array of jutsus are very powerful. In the Fate universe, he might be able to combine his chakra with the magic there. For example, he could infuse his Rasengan with magical energy, making it even more destructive.
In a 'naruto and superman crossover fanfiction', it's a complex matter to determine the most powerful character. Superman's physical abilities are off the charts. He can move planets and withstand nuclear explosions. On the other hand, Naruto has access to a vast amount of chakra, especially when he taps into the power of the nine - tailed fox. He also has his ninja techniques like the Rasengan. But Superman's powers are more natural and instinctive, while Naruto has to train and grow into his power. In a one - on - one battle in a place without kryptonite, Superman might have the upper hand. But if Naruto can strategize and use the environment to his advantage, like using chakra - infused earth to trap Superman, things could be different.
Naruto and Inuyasha themselves would be a very intriguing combination. Naruto's positive attitude and never - give - up spirit combined with Inuyasha's rough - around - the - edges but strong - willed personality would create a lot of interesting interactions. They could start off not liking each other but gradually become friends as they face challenges together.
Well, Erza is a very strong character in Fairy Tail. She has a vast array of armors and combat skills. However, in a crossover, Sasuke could be a real contender for the most powerful. His Sharingan gives him amazing abilities like predicting moves and copying techniques. And his Rinnegan in later arcs makes him even more formidable. But then again, characters like Gildarts from Fairy Tail are also extremely powerful with their unique magic. So it really depends on how the crossover is written and what abilities are emphasized.