When writing Froakie and Fennekin's characters, it's important to consider their evolutionary lines. Froakie evolves into Frogadier and then Greninja. So you can hint at its potential for growth and development in your fanfiction. Maybe Froakie has a hidden strength that it discovers during its adventures with Fennekin. Fennekin, which evolves into Braixen and then Delphox, can be written as having an inquisitive nature from the start. It might be constantly looking for ways to improve its fire - based skills. For both, use their species characteristics. Froakie's water - jumping ability can be used in action scenes, and Fennekin's ability to manipulate small flames can add drama to the story.
A good story idea could be that Froakie and Fennekin become friends during a Pokemon tournament. They start off as rivals but soon realize they have more in common. They then decide to train together and learn new moves from each other. This could lead to them facing a powerful opponent together in the finals. Another story could be that they are both on a quest to find a rare and powerful Pokemon item. Along the way, they meet different Pokemon and trainers, some helpful and some not so much. As they get closer to the item, they also discover a dark secret about the item that could change the Pokemon world if it falls into the wrong hands.
I'm not really into that kind of fanfiction. However, you can try looking on some popular fanfiction websites like Archive of Our Own. There might be some stories about Pikachu and Fennekin, but I'm not sure if they are specifically 'lemon' ones. You should also be aware of the website's terms and any age - appropriate content guidelines.
Often, the theme might revolve around their exploration of the Pokemon environment. They could be on a journey to discover new places or Pokemon species. And also, there could be a theme of mutual understanding. Since they are different types of Pokemon, they might have to learn about each other's strengths and weaknesses to get along well. This can be a really interesting aspect in fanfiction about them.
In a fanfiction, Pikachu and Fennekin could be part of a Pokemon rescue team. They save other Pokemon from various disasters such as forest fires or cave - ins. Pikachu uses its speed and electricity to clear obstacles, while Fennekin uses its intelligence and fire to keep everyone warm and scare away predators. This would show their heroic sides and their bond as teammates.
Maybe in a fanfiction, Pikachu and Fennekin find themselves in a strange, magical forest. They have to rely on each other to find their way out. Pikachu's ability to sense electricity in the air helps them avoid dangerous areas, and Fennekin's sense of smell leads them to sources of food. Their journey through the forest strengthens their bond.
A simple fanfiction could be that Chespin and Fennekin are forced to work together in a Pokemon rescue mission. They initially don't get along due to their different natures, but as they face challenges like rescuing trapped Pokemon from a collapsing cave, they start to understand each other's strengths. For example, Chespin can dig through rubble with its sharp claws and Fennekin can light up the dark areas with its flames.
In a more complex fanfiction, Chespin and Fennekin could be part of a prophecy. There could be an ancient legend that says a grass - type (Chespin) and a fire - type (Fennekin) must join forces to save the Pokemon world from a great evil. Along the way, they meet other Pokemon who either help or hinder them, and they have to learn to trust each other completely to fulfill the prophecy. This would involve character development, exciting battles, and a deep exploration of the Pokemon world.
Well, many 'ash and fennekin fanfiction' works have the theme of discovery. This could be Fennekin discovering new abilities or Ash discovering a new side to Fennekin. There is also the theme of competition. They may enter Pokémon battles together, competing against other trainers. These themes add depth and excitement to the fanfiction, making it appealing to fans of the Pokémon series who are interested in Ash and Fennekin's relationship and their individual development.
Perhaps it's a story where Ash and Froakie form an even deeper bond than in the original series. They might go on a quest to find a rare Pokemon that only Froakie can sense, and along the way, Ash learns more about Froakie's past and its potential. Froakie could also teach Ash some new strategies in battles that help him become a better trainer overall.