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.
No, it's definitely not appropriate. Pokemon is a franchise aimed at children and such content is highly inappropriate and against ethical and moral standards.
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.
Definitely not. This type of search goes against the principles of respect and good taste. The characters of Ash and Serena are meant to be part of a family - friendly story, and creating or looking for nude fanfic about them is a form of disrespect to the original work and its intended audience.
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.
Definitely not. Pokemon is known for its positive and clean content. Writing fanfic with such adult - related terms like'succubus' and 'nude' violates the spirit of the original work and is not acceptable in the Pokemon fan community.