One common theme is maternal love. Ash's mom is always shown to care deeply for him. Another theme is the home - a place Ash returns to and where his mom provides comfort. Also, there's the theme of support, as his mom is often depicted as being his biggest supporter in his pokemon - catching and battling adventures.
In some fanfictions, Ash gets angry. He might be angry at the world, at fate, for taking his mom away. This anger could manifest in different ways, like being more reckless in battles or snapping at his friends when they try to comfort him. But deep down, it's just his way of dealing with the overwhelming pain of losing his mother.
Pikachu is a very likely candidate. It's Ash's most iconic Pokemon and has a deep bond with him. Whenever Ash is in trouble, Pikachu often steps up to protect him.
One good 'pokemon ash and mom fanfiction' is 'A Mother's Pride'. It shows how Ash's mom supports his journey in a really heartwarming way. Another could be 'Ash and Mom: Unseen Bonds' which delves into their relationship through some unique adventures that Ash shares with his mom when he comes back home between his pokemon travels.
Ash could be a Pokémon trainer with a different starting point in this fanfiction. Born in 1987, by 1997 he might have already made a name for himself in local Pokémon battles. He could have a team of Pokémon that he rescued from difficult situations, like a Charmander that was abandoned by its trainer. His story could revolve around giving these Pokémon a second chance and proving that Pokémon don't need to be 'perfect' to be strong.
The impact of Ash's loss in the fanfiction could extend beyond just himself. His Pokémon might also feel demoralized. However, this could also be an opportunity for them to grow stronger together. Ash could start training more intensively, seek new training methods, or even try to catch new Pokémon to strengthen his team.
One popular type of Pokemon Ash and Pikachu fanfiction might be adventure - based. For example, Ash and Pikachu could embark on a journey to a new and mysterious region filled with undiscovered Pokemon species. They might face challenges like difficult terrains and powerful, previously - unseen Pokemon. In this fanfiction, Pikachu's electric powers could be enhanced in some unique way, and Ash would have to strategize differently to overcome the obstacles.
In some of these fanfictions, a heartbreaking scene could be when Ash discovers his mom's death. He might come home after a long journey, excited to see her, only to find the house in mourning. The silence and emptiness of the place would hit him hard.
Well, in certain fanfictions, Ash's inexperience in handling different Pokémon species can make him seem like a bad trainer. He may not be aware of the specific training methods required for some Pokémon. For instance, he might treat a very delicate and rare Pokémon the same way he treats his more common ones, which could lead to the Pokémon not reaching its full potential.
One popular aspect of Alola fanfiction with Ash could be his growth as a trainer. In the Alola region, Ash had unique experiences. Fanfiction might explore how he further developed his skills, formed new bonds with Pokemon, and interacted with the local culture. For example, his relationship with Pikachu might be delved into deeper, showing how they overcame new challenges together in the Alola setting.