Another story idea is that the Joker somehow gets his hands on a powerful and mischievous Pokemon like Ditto. Ditto can transform into any other Pokemon, and the Joker uses it to create all sorts of mayhem in Gotham. Batman has to figure out how to stop the Joker and his shape - shifting Pokemon while also dealing with other criminals who see this as an opportunity to cause more trouble.
One idea could be a story where Batman has to team up with his rogues gallery to fight a greater threat from outer space. Maybe the Joker, Two - Face and the Riddler are forced to put aside their differences when an alien race starts to invade Gotham. They find that Batman's strategic mind and their own unique skills are needed to save the city.
One idea could be exploring Batman's early days as a vigilante in more detail. Show his first encounters with the major villains and how he developed his crime - fighting techniques.
A plot could be that Joker gets his hands on a powerful and mischievous Pokemon like Ditto. He uses Ditto to create chaos by transforming into various threats. Batman has to team up with a young Pokemon trainer to stop the Joker. The trainer could introduce Batman to different Pokemon strategies along the way.
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.
Well, a plot could revolve around Janine being involved in a Pokemon tournament where she uses her unique Poison - type Pokemon in unexpected ways. She might face some opponents who underestimate her because of her small stature but she proves them wrong with her brilliant strategies. Or perhaps a story where Janine discovers an ancient Pokemon artifact that has the power to control all Poison - type Pokemon and she has to protect it from evil forces.
A great plot could involve a world where Skin Pokemon are the outcasts because their changing abilities are seen as untrustworthy. A group of trainers decides to prove that Skin Pokemon are just as loyal and worthy as any other type. They form a sort of rescue team for Skin Pokemon in danger and work towards changing the perception of these unique creatures in the Pokemon world.
One idea could be a story where Batgirl has to save Batman from a new and powerful villain. Maybe this villain has a special weapon that can neutralize Batman's skills, and Batgirl uses her unique abilities, like her gymnastic skills and her knowledge of technology, to turn the tables.
Another interesting fanfic could be set in an alternate universe. In this universe, Batman is a young rookie and Batgirl is his more experienced mentor. It would be a role - reversal story where Batgirl teaches Batman the ropes of fighting crime in Gotham. This could include her showing him how to use his gadgets more effectively and how to read the criminal underworld better.
A cool batman crossover fanfic idea might involve a crossover with the Avengers. Batman's strategic mind and detective abilities would be a great addition to the superhero team. He could help Iron Man with tech, or use his stealth to outwit Loki. Also, a crossover with the Doctor from Doctor Who could be fascinating. Batman could travel through time and space with the Doctor, solving mysteries in different eras.