It could be about loss and the aftermath. When ash becomes cold, it might symbolize the end of something, like a relationship or a great adventure. So, themes of grief and moving on might be common.
I'm not sure which specific 'ash becomes cold fanfiction' you're referring to. There are many fanfiction platforms like Archive of Our Own (AO3) and FanFiction.net where you can search for such works using relevant keywords like 'ash becomes cold' in the search bar.
One possible scenario in this fanfiction could be that Ash has to overcome his toughest opponents yet in Unova. He might face trainers with unique and powerful Pokémon that he has never encountered before. His Pikachu would surely play a crucial role, using its speed and electric attacks to outwit opponents.
One idea could be that Ash has a strange encounter in a mysterious forest. There, he finds a Riolu in distress. As he tries to help the Riolu, a strange energy transfer occurs, and he starts to take on some of Riolu's characteristics. He might gain Riolu's heightened senses, like its ability to sense auras more acutely. This could lead to new adventures as he has to adapt to these changes while still trying to pursue his Pokémon journey goals.
In many fanfictions, Ash achieving the status of a Pokemon Master often involves him having extraordinary battles. He might defeat powerful legendary Pokemon that no one has ever tamed before. His Pikachu could evolve into a more powerful form, which gives him an edge in battles. Also, his bond with all his Pokemon, not just Pikachu, becomes so strong that they can execute complex strategies without any communication barriers.
In these fanfictions, a recurring theme is the relationship aspect. If Ash is cold, it can affect his relationships with his Pokémon and his friends. Some stories might focus on how his Pokémon try to warm him up, both literally and figuratively. And his friends might try to break through his cold exterior. There could also be themes related to the challenges he faces because of this 'cold' state, like being underestimated by his opponents in Pokémon battles.
Well, 'pokemon cold ash fanfiction' might center around Ash's character development in a cold climate. It could show how he adapts to the cold, forms new relationships with Pokemon or other characters in that setting. It may also include some unique plot elements like a quest to find a rare item hidden in an icy region that only Ash can undertake due to his special skills or determination.
It could be an evil wizard. There are many powerful and malevolent wizards in the Fairy Tail universe who might target Natsu for some reason and use dark magic to make him cold.
Latios would obviously be a key character. Also, Pikachu, Ash's loyal Pokémon partner, would be there. Maybe Misty or Brock could also be part of the story, with them either supporting or being skeptical of Ash's newfound admiration for Latios.
His Pokemon could be his potential allies. They've been with him through thick and thin and would likely still support him even with his new vampire state. As for enemies, there might be those in the Pokemon world who fear or dislike vampires and would see Ash as a threat. Maybe some powerful and evil Pokemon trainers who want to use his new situation against him.