Perhaps a story where Harry Potter and Logan meet in a dimension where time and space are distorted. Lemon, who is a local in this dimension, helps them navigate through it. They then realize that an ancient evil from both their worlds is trying to break free in this dimension, and they must combine their skills, Harry's magic, Logan's combat abilities and Lemon's knowledge of the dimension to stop it.
One idea could be a crossover where Harry Potter's magic world intersects with Logan's mutant universe, and Lemon somehow gets caught in the middle. Maybe Lemon discovers she has a hidden magical ability and is sent to Hogwarts for training, while Logan is on a mission to find her. Another could be a story where they all team up to fight a common enemy that threatens both the magical and mutant worlds.
One idea could be that Lilith Lemon is a new student at Hogwarts who has a mysterious past. She meets Harry Potter and they end up on an adventure together to uncover a hidden magic within the school. Maybe she has a special ability related to divination and helps Harry foresee some upcoming danger.
Perhaps a fanfiction where the Basilisk is not a solitary monster but part of a larger, more complex ecosystem in the Chamber of Secrets. There could be other magical creatures that depend on the Basilisk in some way, and when the Basilisk is in danger, these other creatures come to its aid. This would change the whole dynamic of how the characters interact with the Basilisk and the Chamber of Secrets.
Well, one idea is that Tonks uses her Metamorphmagus powers to create elaborate pranks around Hogwarts. She could change into different teachers or even inanimate objects to startle students and have some light - hearted fun. It would be a humorous take on her abilities.
A great plot could be that a new threat emerges that targets both magic - users and mutants. Harry and Logan are brought together by a mutual acquaintance who believes that their combined abilities are the key to stopping this threat. Along the way, they learn from each other's worlds, with Harry teaching Logan about magic spells for protection and Logan showing Harry some of his survival and combat techniques.
One idea could be a story where the Lemon Fairy visits Hogwarts during a magical event. Maybe it's during the Triwizard Tournament and the fairy's magic interacts in unexpected ways with the spells and creatures there. For example, it could use its lemon - scented magic to calm down a ferocious Blast - Ended Skrewt.
In this kind of fanfiction, perhaps there are ideas about how the different cultures in Harry Potter and Starfire's world interact. For example, the social hierarchies in the wizarding world compared to the society Starfire comes from. It could also explore the concept of magic being used in Starfire's home planet or her learning magic from the Hogwarts professors. And of course, there could be some interesting plot twists related to the characters' personalities and abilities.
One idea could be a crossover where Harry and Neville end up in the Naruto universe. They could learn chakra techniques and use their magic in new ways. For example, Harry might combine his Patronus charm with a chakra-based attack. Neville could use his knowledge of Herbology to discover new medicinal plants in the Naruto world.
A possible fanfiction could be set during the Triwizard Tournament. Hera Lemon could be an exchange student from a far - off magical school. She teams up with Harry Potter not as a competitor but as a helper, and they end up uncovering a plot against the tournament that no one else suspected.
A plot could be about a student who has a phobia of large groups (agoraphobia). At Hogwarts, there are always big gatherings in the Great Hall, Quidditch matches, etc. This character could struggle to attend these events. Their friends could try to help them gradually face their fear, and in the process, they might discover a magical solution or just the power of friendship to overcome it.
One plot idea could be that Urahara Kisuke somehow ends up in the Harry Potter universe. He might use his unique inventions and skills from the Bleach world to help Harry and his friends in their fight against Voldemort. For example, his kido skills could be translated into new spells in the wizarding world.