One possible plotline could be that Ash is raised by Arceus to be a sort of Pokémon messiah. He is taught the true essence of Pokémon and is sent on a quest to save the Pokémon world from an impending doom.
One possible plotline could be Ash gaining unique powers from Arceus. For example, he might be able to communicate with all Pokémon in a more profound way. Another could be that Ash has a special mission given by Arceus to save the Pokémon world from a great threat. And perhaps he has to face challenges that test his new - found relationship with Arceus and the powers it has bestowed upon him.
Another plot could be that Arceus is in some sort of trouble and Ash is the only one who can save it by capturing it. This could involve a complex story where Ash has to figure out what's wrong with Arceus and how to use his skills to capture it in a way that helps it.
In 'ash raised by arceus fanfiction', one could expect a lot of creative elements. For example, Arceus being a god - like Pokémon might raise Ash in a way that completely changes his understanding of the Pokémon world. It could involve Ash learning secrets about Pokémon that no one else knows, and this might lead to new adventures and challenges for him.
In some fanfictions, Arceus might be bound by some ancient rules that Ash unknowingly breaks. These rules are so important to Arceus that it feels compelled to betray Ash. For example, if there's a rule about not interfering with a certain type of Pokémon evolution and Ash does it accidentally, Arceus could see it as a major transgression and take action against him.
Obviously, Ash and Arceus are the main characters. Ash is the one being raised, and Arceus is the one doing the raising. But there could also be other Pokémon that are important in Ash's upbringing, like the Pokémon that Arceus assigns to look after Ash or be his companions during his growth.
In this fanfiction, Ash's character development could be significant. Since Arceus is such a powerful and wise entity, Ash may start to think more strategically in battles. He might also become more empathetic towards Pokémon, as Arceus would likely instill in him a greater respect for all Pokémon. This could lead to him making different choices when it comes to capturing and training Pokémon, focusing more on their well - being and less on just winning battles.
One interesting plot point could be how Ash's training methods change under Arceus's influence. Since Arceus is a powerful and divine Pokémon, it might introduce Ash to new and unique ways of training his Pokémon that are different from what he's used to. This could lead to his Pokémon evolving in unexpected ways or developing new and powerful moves.
Well, perhaps in the fanfiction, Ash is raised by Giovanni in a world where the Pokemon League is more corrupt. Ash might be trained to take over the League for Giovanni's benefit. He could then meet his old friends and have to choose between his loyalty to Giovanni and his true friendships. It would make for a very complex and interesting story.
It could be that Arceus betrays Ash by revealing that all of Ash's Pokemon encounters and relationships were fabricated. Arceus made it so that Ash would form bonds with certain Pokemon to further its own ends. For instance, Arceus wanted to study the power of friendship among humans and Pokemon through Ash's experiences. When Ash finds out, he feels used and betrayed. He might then set out on a journey to free his Pokemon from Arceus' control and restore their true free will.
One possible plotline could be a story of conflict and reconciliation. Giratina, often seen as the 'evil' or 'banished' Pokémon, might have some sort of misunderstanding or old grudge against Arceus, the creator. The fanfic could explore how they gradually come to understand each other's perspectives. Maybe there's a threat to the Pokémon world that only they can face together, forcing them to put aside their differences.