In an 'Ash Fights Arceus' fanfiction, perhaps Ash is on a quest to prove himself as the greatest trainer. He hears that Arceus is the most powerful Pokémon and decides to challenge it. Along the way, he meets various Pokémon and trainers who either help or hinder him in his journey to face Arceus in an epic battle.
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 some dark force is controlling Arceus and making it cause chaos in the Pokémon world. Ash, being the hero that he is, feels responsible for stopping this destruction. He trains really hard and uses his unique bond with his own Pokémon to take on Arceus. Maybe he discovers a weakness in Arceus during their fight that has to do with the power of friendship and trust, which are things Ash is known for.
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.
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, 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.
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.
There might be some new characters introduced in the fanfiction. A mysterious Pokemon trainer who has some ancient knowledge about Arceus and can guide Ash. Or perhaps a group of Pokemon researchers who have been studying the relationship between Arceus and the world for a long time. These characters could add more depth to the story, providing different perspectives on the situation between Ash and Arceus, and helping Ash in his fight against the perceived betrayal.
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.
I'm not sure exactly how many fanfictions exist where Ash is the son of Arceus, but it's a very interesting concept. It could lead to all kinds of plot twists. For example, Ash might have some hidden powers or a special connection to the Pokémon world that others don't. This kind of fanfiction can explore the relationship between Ash and Arceus in ways that the original series doesn't.
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 plot might involve Ash trying to prove himself to Alder. Alder could be seen as a sort of mentor figure that Ash wants to impress. Ash enters the battle with his team of Pokémon, each with their own strengths and weaknesses. Throughout the fanfiction, we could see Ash's Pokémon evolving and growing in strength as they face Alder's tough Pokémon. It could also include some emotional moments where Ash reflects on his journey so far.
The setting of when Ash is an Arceus fanfiction can vary greatly. It might be in an alternate reality where Arceus has a more prominent role or during a special adventure in the existing Pok茅mon canon. It all depends on the creativity of the writer.