Sasuke might be very powerful in this crossover. His Sharingan gives him the ability to predict movements and copy techniques. In the Doom world, he could use this to his advantage against the demons. Also, his mastery of lightning - based jutsu could be a great asset when facing the dark creatures. Plus, his brooding and calculating nature would fit well in the often - dark and dangerous Doom setting.
I think Doomguy could also be a top contender. His experience in fighting demons, his arsenal of powerful weapons, and his unwavering determination would make him a strong character in the Naruto - Doom crossover. He might not have chakra, but his combat skills are top - notch. If he were to learn some basic ninja techniques, he could become even more powerful.
However, it could also be a new character created specifically for the crossover. This character could have the best traits of both the Doom Slayer and the Master Chief. Maybe they have the Doom Slayer's combat skills and the Master Chief's understanding of technology. They could be a wildcard that changes the power dynamics in the crossover fanfiction.
It could be the Doom Slayer. He has incredible combat skills and is very experienced in fighting powerful and numerous enemies. He's like a one - man army. His armor and weaponry are also very advanced, which gives him an edge in any fight.
However, Denji as Chainsaw Man also has his own set of powers. He can transform into a powerful chainsaw - like being and has shown great resilience. But compared to the Doom Slayer, he lacks the same level of experience in dealing with the kinds of threats that the Doom Slayer has faced on a regular basis. So, overall, the Doom Slayer would probably be more powerful in a direct comparison.
It's really hard to say. Naruto in his strongest form, like when he has the power of all the tailed beasts, is extremely powerful. He has incredible strength, speed, and the ability to use a vast array of jutsu. However, Aang in the Avatar state has access to all four elements and can be a formidable opponent. If we consider the Avatar state's spiritual connection, it could give Aang an edge in a battle of wills.
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.
Sasuke would also be very powerful. His Sharingan gives him enhanced perception and the ability to copy moves. In the SAO world, he could quickly analyze the fighting styles of opponents and come up with counter - strategies. His Chidori and other lightning - based jutsu could be very effective against the digital enemies in SAO.
However, we can't forget about Steve. He has been living in the Minecraft world for a long time. He has in - depth knowledge of how to build the most powerful weapons and structures. He can use his pickaxe with great skill, which could be as effective as a ninjutsu in some cases. Also, his ability to survive in the Minecraft world's harshest conditions gives him an edge over the Naruto characters who are new to this environment.
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.