There's a fanfic called 'Lopunny's New Friend'. In this, the oc is a young trainer who discovers an injured Lopunny. They form a strong bond as the oc nurses the Lopunny back to health and then they start exploring the Pokémon world together. It's full of heartwarming moments and exciting battles against other Pokémon.
In a well - written oc x lopunny fanfic, the dialogue between the oc and Lopunny (even if it's more of an implied communication in the Pokémon's case) should be natural. It can't be just dry statements. And the pacing of the story should be right. Not too slow that it bores the reader, and not too fast that important details are missed. There should also be some emotional depth, like when the oc and Lopunny face a difficult separation or a dangerous situation together, which makes the reader care about their relationship.
A possible fanfiction could focus on a male character who discovers a lost and injured female Lopunny. He takes her in and nurses her back to health. As she recovers, they form a deep connection. They start exploring the Pokemon world together, with Lopunny learning new moves and the male character learning more about Lopunny's species. It could be a heart - warming story of friendship and mutual growth.
Honestly, it's really hard to determine the single longest Pokemon X Trainer fanfiction without extensive research. Some fanfictions might be hundreds of pages long. However, different platforms may host different lengths of such stories. You could start by looking at the most popular and highly rated ones on major fanfiction sites and check their lengths from there.
One common theme is friendship. Just like how a trainer and his Pokemon are friends, a male and female Lopunny can have a strong friendship in fanfiction. Another theme is adventure. They could go on quests together, like finding rare items or exploring new regions.
In these fanfictions, the author has the freedom to explore new storylines. They can create adventures that are specific to this pairing. For example, how Ash and the anthro Lopunny interact in a world where Pokemon have more human - like qualities. It also allows for exploring different emotions and character developments that might not be possible in the canon series. Plus, the anthro Lopunny can bring in her own set of characteristics and abilities that add depth to the story.
One possible plotline could be that the trainer is on a quest to find and capture Raikouf. Along the way, they face numerous obstacles like other powerful Pokémon or rival trainers. Another plot could be that the trainer already has Raikouf and they are training it to become the strongest in a certain competition, like a Pokémon league.
There might be a 'mega lopunny lemon fanfic' out there, but it could be difficult to find. Firstly, 'mega lopunny' is a rather specific character. Fanfic writers may or may not have created stories around it. And 'lemon' in the context of fanfics often implies a more mature or risqué content. Some platforms might not allow such content, so it depends on where you look. You could start by looking in the Pokémon fanfic communities or relevant forums to see if anyone has heard of it.
In these fanfictions, the female trainer often starts as an inexperienced but enthusiastic character. As she travels through the Pokemon X world, she gains confidence. For example, if she has a difficult battle against a strong opponent, she learns from it and becomes more strategic. The 'lemon' element might be related to her bright and energetic personality, which attracts other characters, and through these interactions, she further develops her social skills and becomes more well - rounded.