In this fanfic, Jon Snow could be a special Pokemon ranger. He is sent on a mission to a region that has been affected by a strange phenomenon that is making Pokemon act aggressively. Jon, with his experience in handling difficult situations in Westeros, uses his wisdom and combat skills. He forms a bond with a Growlithe, which he names Ghost after his direwolf. Together, they work to solve the mystery and restore peace to the Pokemon region.
His loyalty, which was evident in his relationships in Westeros, would translate to strong bonds with his Pokemon. He would stand by his Pokemon through thick and thin, just like he did with his friends in the North. He might have a small team of Pokemon, but they would be a tightly knit group, relying on each other in battles and in their adventures.
A possible plotline could be Jon Snow getting lost in the Pokemon world and having to find his way back to Westeros. Along the way, he befriends various Pokemon and uses their skills to survive.
A great plot could involve a world where Skin Pokemon are the outcasts because their changing abilities are seen as untrustworthy. A group of trainers decides to prove that Skin Pokemon are just as loyal and worthy as any other type. They form a sort of rescue team for Skin Pokemon in danger and work towards changing the perception of these unique creatures in the Pokemon world.
Well, a plot could revolve around Janine being involved in a Pokemon tournament where she uses her unique Poison - type Pokemon in unexpected ways. She might face some opponents who underestimate her because of her small stature but she proves them wrong with her brilliant strategies. Or perhaps a story where Janine discovers an ancient Pokemon artifact that has the power to control all Poison - type Pokemon and she has to protect it from evil forces.
One popular 'Jon Snow Pokemon fanfic' might be 'Jon Snow's Pokemon Adventure'. In this kind of fanfic, Jon Snow could be imagined as a Pokemon trainer in the Pokemon world. He might start his journey in a region like Kanto or Sinnoh, catching Pokemon like Pikachu or Charmander along the way.
One idea could be that Goku arrives in the Pokemon world by some sort of interdimensional rift. He might be confused at first but then start to explore the concept of Pokemon battles. He could use his martial arts skills to train Pokemon in a unique way, like teaching them special combat moves. For example, he could train a Pikachu to use a move similar to his Kamehameha, but in a more Pokemon - friendly version, like an electric blast with a similar charging motion.
Well, it could be that the chemical mishap causes a Pokemon habitat to be contaminated, and the heroes have to find a way to clean it up and save the Pokemon.
One interesting storyline could be about a trainer who discovers a rare giant Pokemon in a hidden, ancient forest. The trainer has to learn how to communicate and bond with this massive creature, facing many challenges along the way.
Sylveon is a very charming Pokemon. In a harem scenario, it could be the Pokemon that brings harmony to the group with its fairy - type nature. And then there's Lucario. It's strong, intelligent, and has a sense of honor. It could play the role of the protector in the harem, making sure all the other Pokemon are safe while also having a special bond with the trainer.
One plot could be that Jon Snow somehow gets transported into the Pokemon world. He might use his combat skills and leadership abilities to form a team of Pokemon trainers and battle against an evil organization. His sense of justice would fit well in the Pokemon universe.