A possible plotline is Fem Harry getting into trouble because of her dual identity. The Pokemon world might not understand magic, and the wizarding world might not approve of her being so involved with Pokemon. This conflict could drive the story forward as she tries to find a balance. Also, she could go on a journey to discover more about her father Ash's past and the secrets of the Pokemon world that he might be hiding.
One plotline could be Fem Harry trying to keep her magical abilities a secret in the Pokemon world while also trying to fit in as Ash's daughter. Another could be her using her magic to help Ash in a particularly difficult Pokemon battle. Maybe she uses a spell to make a Pokemon stronger or to break an opponent's tricky move.
One possible plotline could be that Harry, as a female, discovers her true heritage as the predator's daughter and has to struggle with hiding this fact from her friends at Hogwarts. She might be afraid of how they'll react if they find out she's part - alien.
One possible plotline could be that Fem Harry discovers her true heritage as Celestia's daughter and has to learn to control newfound magical powers related to Celestia's realm. Maybe she has to travel between the Harry Potter world and the world of Celestia to prevent some sort of catastrophe that threatens both worlds.
In a Fem Harry as Ash Ketchum's daughter fanfiction, she would probably have a very adventurous spirit. Since Ash is always on the go exploring new places in search of Pokemon, Fem Harry would likely be the same. She might use her Hogwarts - like magic education to enhance her Pokemon training. For instance, using spells to create better habitats for her Pokemon or using divination to predict where rare Pokemon might be found.
One possible plot could be that Fem Harry, being a big fan of Ash Ketchum, decides to embark on her own Pokémon - like adventure in the wizarding world. She might try to catch magical creatures in a way inspired by Ash's Pokémon-catching methods. For example, instead of using Poké Balls, she could use magic spells or enchanted objects to capture and befriend magical creatures like Kneazles or Nifflers.
Perhaps the fem Harry Potter is raised in Hogwarts without knowing her true father. But when she accidentally casts a spell that reveals her connection to the Joker, she is sent on a journey to Gotham. There, she discovers a whole new world full of crime and corruption. She tries to bring some of the magic - based solutions she learned at Hogwarts to Gotham, like using spells to clean up the slums or protect the innocent. Meanwhile, she has to deal with the Joker's attempts to draw her into his world of madness.
One common theme could be adventure. Since both Harry Potter and Ash Ketchum are known for their adventures in their respective universes, combining them in fanfiction often leads to exciting new adventures. Maybe they team up to fight a new, powerful villain that threatens both the wizarding world and the Pokémon world.
One possible plotline could be Fem Harry struggling to hide her true identity in the wizarding world. Since she's Lucifer's daughter, she might have unique powers that set her apart and draw unwanted attention. Another could be her journey to understand her father's nature and the implications of being related to him. Maybe she has to deal with characters from the underworld trying to influence or use her for their own purposes.
One possible plotline could be that Ash, as a girl, has to face different challenges in the Pokémon world. For example, some trainers might underestimate her at first. She could also form new friendships or rivalries. Maybe she'd have a different approach to training Pokémon, focusing more on strategy and less on brute strength like she sometimes did as a boy. Another aspect could be how her Pokémon react to her new form. Some might be more protective, while others could be confused at first but then adapt.
One possible plotline could be that a villain uses a new type of Poké - ball technology to control Ash's mind and make him do their bidding, like stealing Pokémon from other trainers. Another could be a strange psychic Pokémon that accidentally takes over Ash's mind while trying to communicate, leading to some chaotic and comical situations as his friends try to figure out what's wrong and break the control.
Fem Harry would likely approach Ash with great enthusiasm. She would probably ask him a million questions about his Pokémon adventures, like how he caught his first Pikachu. Ash, being friendly, would happily answer. And in return, he might be curious about Harry's magic world, asking things like how she can fly on a broomstick.