One interesting plot could be Ash trying different Pokemon foods that cause unexpected weight gain. For example, he might taste a new type of Poke - Puff that has a strange side effect on his metabolism. Another plot could be that a certain Pokemon's ability accidentally affects Ash, making him gain weight gradually. Maybe a psychic - type Pokemon's power goes awry and messes with Ash's body composition.
In some pokemon ash weight gain fanfic, a possible plot is that Ash is given a special training regime by a new mentor. However, this regime involves eating a large amount of a very fatty type of Pokemon food as a source of energy. Initially, Ash doesn't notice the weight gain, but as his clothes start to feel tighter and his movement becomes a bit more sluggish during battles, he realizes something is wrong. He then has to figure out how to balance his new diet and training without sacrificing his Pokemon - catching and battling goals.
One interesting plot could be that Ash discovers a new Pokemon that has the power to make things around it gain weight, and accidentally gets affected himself. This leads to him having to adapt to his new body while still trying to pursue his Pokemon journey.
Obviously, Ash is the central character. Pikachu is also often included as Ash's closest companion. Misty and Brock might also be present. They could be the ones who first notice Ash's weight gain and either tease him or try to help him. Other trainers like Gary could also be in the story, perhaps competing with a now - heavier Ash and making snide remarks about his changed physique.
I'm not entirely sure specifically as 'ash weight gain fanfic' could be very specific to a particular fandom or writer's creative idea. It might involve a character named Ash experiencing some form of weight gain in a fictional story.
One interesting plot could be Ash and Cynthia teaming up to take on a powerful, new and mysterious Pokemon that threatens the region. They combine their skills and knowledge to figure out its weaknesses.
One possible plot could be that Bowser discovers a magical food source that makes him gain weight uncontrollably while he tries to figure out how to reverse it.
Another theme is the change in their abilities. Sometimes, the weight gain can either enhance or hinder their pokemon powers, which is often explored in these fanfics. For example, a heavier pokemon might be slower but have more physical strength in a fight. Also, friendship is a big theme. Their friends' reactions to the weight gain, whether it's supportive or not, play a major role in the story. In some fanfics, friends help the pokemon to lose weight if it's causing problems, or they accept the pokemon just as it is.
Well, one interesting plot could be Ash forming unique friendships with different Pokemon in the school setting. For example, he might discover a new Pokemon with special abilities and help it overcome its shyness. Another plot could be the various competitions and challenges within the school that Ash and his friends participate in, like a Pokemon battle tournament where they have to strategize and use their Pokemon's skills to win.
Fans of the character Ash, if it's related to a well - known series. They might be interested to see a different take on the character.
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 possible plot could be that they are tricked into eating a lot by an evil character who wants to slow them down. Another could be that they accidentally find a food source that is so delicious but very fattening.