Well, Harry is a very determined and resourceful wizard. He has overcome many powerful enemies in his own world. But Kaguya is on a whole different level of power. She has the power to create dimensions and manipulate time. Harry would need to be extremely clever and use his magic in ways he's never done before. For example, he could combine different spells to create a super - spell. But even then, Kaguya's raw power might be too much for him to handle. So, in most cases, Kaguya would likely win, but with Harry's unpredictability, there's always a small chance he could pull off a victory.
If we consider the nature of their powers, Odin is a god from Norse mythology. He has thousands of years of combat experience and powers over life and death in his own realm. Harry, though a very powerful wizard, is still young and learning. But Harry has the element of surprise. His magic is different from anything Odin has encountered. So, it could be that Harry could use his unorthodox magic to initially gain the upper hand, but in the long run, Odin's vast power and experience might tip the scales in his favor.
It's hard to say. Harry has his magic and his wits. But the Volturi are very powerful vampires. If Harry can use his magic quickly and creatively, he might have a chance. But the Volturi have their own powers like super strength and mind control. So it could really go either way.
I think Harry Potter would win. He has been trained in combat magic since he was a kid at Hogwarts. He has faced many powerful dark wizards and survived. Imhotep is powerful too, but Harry's magic is more versatile and he has a great support system in his friends. So, Harry would probably find a way to outsmart Imhotep and defeat him with a well - placed spell.
It's really hard to say. Merlin is an extremely powerful wizard from legend, but Harry has his own set of skills and experiences. If it's a battle of pure magic power, Merlin might have the upper hand. But Harry has the advantage of being familiar with the modern Hogwarts environment and having friends who could help him. So it could go either way.
It's really hard to say. Naruto has his powerful jutsu like the Rasengan and his ability to use the Nine - Tails' chakra. But the Hokage also has a vast amount of experience and unique jutsu of their own. If it's an early - days Naruto fighting an experienced Hokage like the Third Hokage, the Hokage might have the upper hand. But if it's a fully - powered Naruto from later in the series, he could be a tough opponent for any Hokage.
The outcome of the fight in the 'naruto fights the kyubi fanfiction' is quite uncertain. Naruto has his own set of skills, like his Rasengan and his ability to use shadow clones effectively. On the other hand, the Kyubi has raw power that is almost unrivaled. If Naruto is able to find a weakness in the Kyubi, perhaps something related to its past or its connection to the ninja world, he could win. But if the Kyubi manages to break Naruto's spirit, then the Kyubi would be the victor.
Arceus is a god - like Pokémon, so it seems likely that it would win. But in fanfiction, the rules can be bent. Ash has a lot of experience and a strong will. If he manages to form a powerful alliance with other legendary Pokémon, he might stand a chance against Arceus. However, it's still a long shot as Arceus has near - omnipotent powers.
It's hard to say. Percy has his wits and his special powers like controlling water. But Ares is a god, very powerful. If Percy can use his environment well, like creating a big wave to distract Ares, he might have a chance to win.
It's really hard to say. Naruto has his powerful ninjutsu like the Rasenshuriken which can cause massive damage. But the Humunculi have regeneration abilities. If Naruto can figure out a way to completely destroy their Philosopher's Stone (the source of their power), he might win. However, if the Humunculi can use their alchemy to counter Naruto's attacks and get close to him, they could be a serious threat.
Naruto would probably win. He has the Nine - Tails' chakra which gives him a huge boost in power. He can also enter Sage Mode and has mastered many powerful techniques over the years. Zeref is strong, but Naruto has faced some really tough opponents and has always found a way to come out on top. In a fanfiction fight, Naruto's determination and willpower would also play a big role.