There might be. Fanfiction writers love to create crossovers and unique scenarios. Since Naruto and Arceus are from different fictional realms (Naruto from the ninja world and Arceus from the Pokémon world), a story with Naruto as the father of Arceus would be quite an out - of - the - box concept. It could involve some complex world - building and character development to make it work.
Well, perhaps Naruto could be transported to the world of Arceus. He might discover his own chakra has some unique connection to the power of Arceus. Maybe he has to team up with Pokémon to fight against some dark forces that are threatening both the Pokémon world and his own ninja world.
Well, it could be that Arceus, being a powerful and god - like Pokémon, sees Naruto's potential and decides to take him under his wing. Maybe Arceus helps Naruto gain new powers related to Pokémon abilities. For example, Naruto could learn to use Pokémon moves in his battles against the Akatsuki or other enemies in the Naruto world.
In this fanfiction, it might show Naruto being able to communicate with Pokémon like Arceus can. He could use this ability to gain allies in the form of Pokémon. His friends in the Naruto world might be initially skeptical or even afraid of his new connection. But as the story progresses, they learn to accept it and work together with Naruto and his Pokémon allies to face greater threats that are endangering both the Naruto world and the Pokémon world.
In a 'Naruto father of Arceus' fanfiction, the plot could start with Arceus being in some sort of danger in the Pokémon world. Naruto, being a hero in his own right, is summoned to help. He doesn't understand the Pokémon world at first but quickly adapts. As he protects Arceus, he forms a bond with it like a father - son relationship. Naruto then uses his skills like shadow clones to train Arceus and teach it how to fight against the threats. Along the way, they also learn from each other, with Naruto learning about the unique powers of Pokémon and Arceus learning about Naruto's ninja code of ethics. This could lead to a whole new era in the Pokémon world where Naruto's influence changes the way Pokémon interact and are perceived.
Maybe a group of dark - type Pokémon that have banded together and are trying to overthrow Arceus. They view Naruto as an easy target at first, but quickly realize he is a formidable opponent with his ninja skills and new Pokémon - related powers. They would constantly try to undermine Naruto and his efforts to protect the Pokémon world.
One interesting plot could be Naruto being transported to the world of Arceus and having to learn about the Pokémon there while still retaining his ninja skills. He could use his jutsu in new and creative ways to interact with Pokémon.
In the Naruto world, it could be Orochimaru. He might be interested in Naruto's newfound Pokémon - related powers and try to capture him to experiment on him. Orochimaru is always after power, and Naruto's unique abilities could be very appealing to him.
Arceus itself might be a character in a way. Maybe it appears in Naruto's dreams or visions, guiding him on how to use his powers. Also, other characters from the Naruto universe like Sakura, who might be in awe of Naruto's new abilities, and might also play a role in helping him understand and control his powers better.
A powerful and ancient Pokémon from a long - forgotten era could be the cause. This Pokémon might have a grudge against Arceus for some past event and has finally found an opportunity to strike and hurt it. For instance, if Arceus had banished this Pokémon in the past, it could now be seeking revenge.