Well, the plot could involve Ash getting transported to a special realm where Arceus resides. Maybe Arceus sees something special in Ash and decides to test him. Ash could be given tasks that are related to saving the Pokemon world from a great danger that only he, with the help of Arceus, can prevent.
One possibility is that Arceus has a prophecy about Ash. In the fanfiction, Arceus might choose Ash to be the one to bring balance to the different regions of the Pokemon world. Ash would then embark on a journey with new Pokemon partners given to him by Arceus, facing challenges and rivals along the way.
In such a fanfiction, Ash might gain some extraordinary powers. Since Arceus is a very powerful Pokemon, it could bestow upon Ash the ability to understand all Pokemon languages instantly. This would give him an edge in his Pokemon journey, allowing for deeper connections with his Pokemon and better strategies in battles.
Another theme is the power of friendship. Ash's relationship with his Pokemon is central. When he meets Arceus, his Pokemon friends might play a crucial role in the encounter. For example, Pikachu could use its electric attacks to protect Ash if there's any danger during the meeting.
Well, it could be about Mewtwo, a powerful psychic Pokémon, and Arceus, the creator Pokémon, having a battle of wits. Maybe Mewtwo challenges Arceus' authority in the Pokémon world, leading to an epic showdown where their powers clash and the very fabric of the Pokémon universe is at stake.
One possible plot could be that Ash discovers a threat to the Pokémon world that only Arceus can stop. But Arceus is somehow corrupted or misinformed. So Ash has to fight Arceus to snap it out of it and save the world.
Well, it could be that Ash makes a discovery that goes against Arceus' grand plan and is thus betrayed. Maybe he finds out something about the balance of the Pokemon world that Arceus doesn't want known.
Well, one possible plot could be that Ash's father turns out to be a powerful Pokemon trainer who has been on a secret mission all this time. When they meet, his father shares some unique Pokemon training techniques with Ash.
A possible plot for a Pokemon Ash and Arceus fanfiction could be that Ash is summoned by Arceus to a sacred place. There, Arceus reveals that Ash has been chosen to help balance the powers of all the different types of Pokemon in the world. This would involve Ash traveling to different regions and facing challenges related to each type of Pokemon. For example, in a region dominated by fire - type Pokemon, he might have to find a way to cool things down without harming the Pokemon. Another plot could be that Ash accidentally angers Arceus, and as a punishment, he has to go on a journey to prove his worth and respect for all Pokemon. He has to complete tasks like helping a group of endangered Pokemon species thrive again. And, a third plot idea is that Arceus gives Ash the ability to transform into different Pokemon forms for a short time to better understand them, and Ash uses this power to solve various problems in the Pokemon world.
The meeting would likely give Ash a new sense of purpose. He might shift his focus from just winning battles and championships to something more grand, like protecting the entire Pokemon universe. He could also meet new and rare Pokemon through his connection with Arceus.
A potential plot could be centered around Ash's role in a prophecy. Since he is the son of Arceus, he is the key to saving the Pokémon world from a great danger. He has to travel to different regions, gather powerful Pokémon, and learn ancient secrets about his father. His friends might initially be skeptical of his new identity but eventually come to support him as he faces numerous challenges and battles against powerful foes.
Well, it could be about Ash and Red teaming up to face a powerful new villain in the Pokemon world. Maybe they combine their unique skills and knowledge of Pokemon to overcome challenges.