You could write a fanfic where Pokemon Hunter J discovers a new type of Pokemon that has special powers. This Pokemon could be the key to a mystery she's been trying to solve. Along the way, she has to deal with other hunters who also want to get their hands on this new Pokemon. As she gets closer to the truth, she starts to question her own motives.
A cool Pokemon Hunter J fanfic could focus on her facing off against a powerful trainer who is trying to stop her illegal activities. The battles between their Pokemon could be really intense, with the trainer using unique strategies. It could also show her slowly realizing that there might be more to life than just hunting Pokemon for profit.
One idea could be a story where Pokemon Hunter J has a change of heart. Maybe she encounters a particularly powerful and kind Pokemon that makes her question her ways. For example, she tries to capture a Latios, but it shows her kindness and she starts to hesitate.
It could be about the return of Pokemon Hunter J in a fan - created story. Maybe it involves her new hunts, encounters with different Pokemon, or her interactions with other characters from the Pokemon universe.
One interesting plotline could be Ash and his friends trying to outwit Hunter J's devious plans to capture rare Pokémon. Maybe Hunter J sets a trap for Pikachu, and Ash has to use his wits and the bond with his Pokémon to rescue Pikachu.
Obviously, Pokemon Hunter J would be one of the main characters. There might also be some Pokemon that play significant roles, either as her targets or as ones that oppose her.
One idea could be a story where Pokemon trainers are recruited to participate in a Monster Hunter style quest. They have to use their Pokemon's skills in a new and dangerous environment filled with the large and menacing monsters from Monster Hunter. For example, a Charizard could use its fire breath not just to battle other Pokemon but to fend off a Rathalos. Another idea is a crossover where a particular Pokemon has some sort of connection to a Monster Hunter creature, like Pikachu being able to communicate with a Felyne and they team up to solve a mystery in both their worlds.
Another interesting concept is to write a fanfic about a group of Pokemon that form a secret society. They have their own rules and goals, and the story could follow a human or a Pokemon who stumbles upon this society and gets involved in their affairs.
One idea could be a fanfic where a trainer discovers a new and rare Pokemon species in an uncharted region. Another could be a story about a Pokemon that has unique abilities and how it changes the Pokemon battles in a particular area. Maybe a fanfic that focuses on the friendship between a trainer and a Pokemon that is usually considered difficult to train.
Another idea is a fanfic that focuses on Menchi's past. Maybe she had a mentor who taught her everything she knows about cooking and hunting for ingredients. The story could explore her relationship with this mentor, how she overcame difficulties in her training, and how those experiences shaped her into the tough examiner we see in the series.
One idea could be a new student arriving at the Hunter School with a unique nen ability that no one has seen before. This student then has to prove themselves in various trials and battles against the existing students. For example, they might face off against Gon and Killua in a sparring match that tests not only their physical skills but also their strategic thinking.
One idea could be a story about a trainer who discovers a rare lemon - colored Pokémon in a hidden grove. The Pokémon has unique abilities related to nature, like making lemon - scented plants grow rapidly. This could lead to an adventure where the trainer has to protect the Pokémon from poachers who want to sell it on the black market.