The plot could start with a strange rift opening between the Naruto universe and the Percy Jackson universe. Naruto, with the Juubi's power inside him, gets sucked into the Percy Jackson world. At first, there's a lot of confusion. The demigods are on guard, thinking Naruto is a new kind of threat. But as they start to communicate, they realize they have a common enemy in the form of a powerful being that wants to take advantage of the chaos caused by the rift. So, they team up to fight this enemy.
Maybe in this crossover fanfiction, the gods in the Percy Jackson world sense the Juubi's power and become worried. They see it as a potential disruption to their order. Meanwhile, Naruto is just trying to find a way back home. He teams up with Percy who is also an outcast in a way among the gods. Together, they go on a quest to find a way to close the rift and also deal with the gods' concerns. Along the way, they face various challenges, like battling mythical creatures that are drawn to the Juubi's power. Their friendship grows as they face these difficulties side by side.
In a crossover fanfiction, the settings could merge. For example, Camp Half - Blood could be visited by Naruto. The demigods would be intrigued by his chakra abilities, which are so different from their own powers based on the Greek gods. Naruto could teach them some of his ninja skills in return for learning about their combat techniques. And perhaps the Juubi's presence could disrupt the natural balance of the Percy Jackson world, leading to new and unexpected adventures for both Naruto and the demigods.
In such a crossover fanfiction, the universes could blend through shared quests. For instance, a new evil force that is interested in both the power of the Juubi and the powers of the Greek gods. Naruto and Percy would be brought together to fight this common enemy. Along the way, Naruto would introduce things like chakra and ninja tools to Percy, while Percy would show Naruto things like the Camp Half - Blood and his sword Riptide. This way, their universes would gradually merge.
It could be a really exciting story. Imagine Naruto's ninja skills combined with the powers of the Juubi in the world of Percy Jackson. Naruto might use his Rasengan against some mythical monsters. And Percy could show Naruto the underwater world of the demigods. The two different mythologies and power systems would create a lot of interesting conflicts and friendships.
The plot might involve Naruto being mistaken for a demigod at first. Since he has such extraordinary abilities in his own world, in the Percy Jackson world, he could be seen as a very powerful and mysterious figure. He might have to learn about the Greek gods and their ways while also teaching Percy and his friends some of his ninja techniques. And together they'd go on quests, like trying to retrieve a powerful artifact that could potentially destroy both worlds if it fell into the wrong hands.
In a Naruto and Percy Jackson crossover fanfiction, the characters could have some really interesting interactions. For example, Naruto's ninja skills like shadow clones could be compared to Percy's ability to summon water creatures. Maybe they would team up to fight a common enemy that threatens both their worlds, like some sort of mythical - ninja hybrid monster. Also, Naruto could learn about Greek mythology from Percy and vice versa, leading to some funny and unexpected cultural exchanges.
Perhaps there's a character crossover in a more unique way. A demigod in the Percy Jackson world has a distant relative who was cursed in the Diablo world. This demigod, through some magical accident, gets transported to the Diablo realm. Percy, worried about his friend, follows. In the Diablo world, they have to adapt to the darker and more brutal environment. Percy has to use his skills in a different way, like his water powers to cool down the hellish fires. They meet Diablo - like characters who may not be all bad, and together they try to break the curse and find a way back home.
The plot could involve Naruto characters in the world of Soul Eater. Maybe Naruto's chakra could be seen as a unique form of soul energy. The Juubi's power might be something that either disrupts or enhances the balance in the Soul Eater universe. For example, the Shinigami in Soul Eater might be very interested in the Juubi's power and try to either contain or use it. And Naruto characters could have to adapt to the rules of the DWMA (Death Weapon Meister Academy), like how they deal with Kishin eggs.
Well, if Naruto absorbs the Juubi in a crossover fanfiction, he would likely become extremely powerful. His already formidable chakra reserves and abilities would be enhanced to a whole new level. He might gain new jutsu or the ability to manipulate the world in ways he couldn't before. Maybe he could even use the power of the Juubi to achieve peace in the ninja world more easily.
One possible plot could be that the characters from Avatar find themselves in the world of Percy Jackson. For example, Aang could meet Percy and they discover that their powers, though different, are both related to elements in a way. Aang's airbending and connection to the spirit world might be seen as similar to Percy's connection to the water and his demigod powers. They could team up to fight a common enemy, perhaps a new kind of monster that is threatening both the Avatar world and the demigod world.
One possible plot could be that Percy Jackson, with his demigod powers, somehow gets transported to the world of Overlord. He might initially be seen as a strange being by the denizens of that world. He could team up with some of the characters from Overlord to fight against a common enemy, like a new powerful dark force that threatens both his world and the Overlord world. His water - based powers would be quite unique there and could be used in creative ways during battles, for example, to put out fires in a burning city or to create barriers against enemy attacks.