Well, one interesting plot could be Ash and Chikorita facing a powerful and rare Pokémon together. They might have to use their unique bond to overcome it.
Perhaps a plot where Chikorita gets lost and Ash has to search through a mysterious forest to find it. Along the way, he discovers new Pokémon species and secrets about Chikorita's past. In this fanfiction, it could show Ash's determination and how much he cares for Chikorita.
Obviously, Ash and Chikorita are the main characters. Ash is the Pokémon trainer, and Chikorita is his Pokémon.
One popular storyline could be Ash and Chikorita's journey through a new and mysterious region. They might encounter rare Pokemon and face unique challenges together. Another could be a story focused on the bond between Ash and Chikorita, how they grow and support each other. For example, Chikorita might get injured while protecting Ash from a powerful enemy Pokemon, and this event strengthens their connection.
Yes, there are likely some out there. You can try searching on fanfiction platforms like FanFiction.net or Archive of Our Own. Just type in the keywords 'pokemon ash and chikorita harem' and you might find some interesting stories.
Another plot idea is that Chikorita falls ill in a new region Ash is exploring. Ash has to search for a rare herb to cure it. During this time, he meets other trainers who either help or hinder his search. This plot would focus on Ash's determination to save his Pokémon friend and the relationships he forms during the search.
One interesting plot could be Ash forming a unique bond with each Pokémon in his harem. For example, he might have special training sessions with different Pokémon that are tailored to their individual strengths and weaknesses.
One interesting plot could be a trainer's journey to become the ultimate Pokemon Master with a team of rare and powerful Pokemon. They might face off against an evil organization trying to take over the Pokemon world.
One plot idea could be that Ash and Chikorita form a special bond during their adventures. Other Pokemon, attracted by Ash's kindness and Chikorita's unique charm, start to gather around them, creating a harem - like situation. They then go on to face various challenges together as a group.
A possible plot could be that Ash gets lost in a spooky area where Fantina is known to reside. She takes him under her wing and shows him the secrets of the area. Along the way, they train their Pokemon together and Ash learns new battle techniques from Fantina. This encounter could also lead to Ash becoming more confident in dealing with Ghost - type Pokemon, which Fantina is an expert in.
One interesting plot could be Ash and Nora teaming up to discover a new and rare Pokemon species. They might face challenges like difficult terrains and other trainers trying to stop them.
In some 'pokemon ash and oc fanfiction', the plot might revolve around the OC coming from a different region with a whole new set of Pokemon. This could introduce Ash to new training techniques and Pokemon species that he hasn't encountered before, adding a fresh dimension to his journey.