Well, for Toxapex in the story, I'd say a great moveset is Venoshock, in addition to Recover, Toxic Spikes, and Haze. Venoshock deals more damage when the target is poisoned, which pairs well with Toxic Spikes. Recover, of course, is there to keep Toxapex alive. Haze can be used to clear out any stat changes on the field, which can be really handy in certain story battles.
One effective moveset for Cofagrigus could be Shadow Ball, Will-O-Wisp, Protect, and Toxic. These moves give it a mix of offensive and defensive capabilities.
Brock could be a great addition. He could provide some comic relief and also be the voice of reason. For example, when Ash and Pikachu get into some crazy situations, Brock could be the one to offer practical solutions.
The change in its appearance can make it scary. For example, if its usually cute yellow fur turns dark or if its bright red cheeks become a sinister red glow. Also, if it starts to behave in an uncharacteristic way, like making menacing noises instead of its usual cute sounds.
Another great author is 'PikachuPal'. They have a unique style of writing where they not only focus on the action - packed battles but also on the small, everyday moments between Ash and Pikachu. Their stories really bring out the charm of the duo.
Well, there are many great writers. Some fans who have a deep understanding of Pokémon behavior like to write these fanfictions. One popular writer might be someone who goes by the name 'PokeFan123'. They often create stories where Snivy and Pikachu have really unique personalities and adventures.
The transformation aspect (TF) is a great element. It allows for new and exciting storylines as Pikachu can change into something completely different, like a more powerful or unique form. The gender transformation (TG) can add an interesting layer of complexity, like how Pikachu's behavior might change. Another good element is how Ash reacts to these changes in Pikachu, showing their strong bond.
Obviously, the main characters are usually Pikachu. But sometimes, there could be other Pokémon that play important supporting roles. For instance, a Pichu could be a sidekick or a younger Pokémon that the Pikachus are protecting.
One interesting plot could be two Pikachus from different regions meeting and learning about each other's unique electric attacks. For example, one Pikachu might know a special move that the other has never seen before. They could then teach each other and become stronger together.
Brock is also a good option. His knowledge of Pokemon and their care could be useful in the fanfiction. He could help Pikachu when it gets sick or injured, using his skills as a Pokemon breeder.