A crossover with a fantasy realm could also be cool. Picture Johnny Gat in a world of magic and mythical creatures. He might initially be skeptical of the magic around him but quickly learn to use it to his advantage. He could form an unlikely alliance with a wizard or a warrior elf to defeat an ancient evil that threatens the land.
A great plot could be that Johnny Gat gets framed for a crime he didn't commit. The Fem Boss doesn't believe he's guilty and decides to help him clear his name. Along the way, they discover a conspiracy within their own organization that goes much deeper than they thought. This forces them to rely on each other more and more, leading to a strong bond between them.
I think Deadpool would be a great crossover character with Johnny Gat. They both have a crazy sense of humor and are not afraid to get into some wild and violent situations. Their banter would be hilarious as they fight side by side against bad guys.
One idea could be that the female boss initially hires Johnny Gat for a dangerous mission. As they work together, they start to respect each other's skills. For example, she might be impressed by his combat abilities and he by her strategic mind.
How about a crossover with the 'Teenage Mutant Ninja Turtles'? Johnny Cage could end up in New York City's sewers and meet the turtles. He'd be initially shocked but then impressed by their ninja skills. They could all work together to stop Shredder from getting his hands on some powerful ancient artifact that Cage was also after.
One popular idea could be a crossover with the 'Jojo's Bizarre Adventure' universe itself, like Johnny Joestar meeting other Joestars from different parts of the series. Another could be a crossover with a different anime, such as 'One Piece', where Johnny might team up with the Straw Hat Pirates on some wild adventure. Or perhaps a crossover with a superhero universe, where he uses his Spin abilities in a world full of caped crusaders.
A Johnny Bravo crossover with Dexter's Laboratory would be interesting. Johnny might stumble into Dexter's secret lab, thinking it's some kind of cool hangout. Dexter would be initially annoyed but then they could team up to stop a common enemy, like an evil robot that has escaped from Dexter's lab and is causing chaos in the city. Or a crossover with Courage the Cowardly Dog. Johnny goes to visit Courage's farmhouse and gets caught up in all the spooky happenings there.
One idea could be to explore what would have happened if Johnny hadn't injured his hand. He might have continued as a successful silversmith and perhaps even become a renowned artist in the colonies. Another idea could be a time - travel fanfiction where a modern - day character goes back in time to meet Johnny and gets involved in the events of the story, like the fight for independence. A third idea is to write a fanfiction from the perspective of one of the other apprentices in the silversmith shop, how they view Johnny's rise and fall and their own role in the whole situation.
One idea could be that Johnny Bravo accidentally travels to the world of Samurai Jack. He tries to use his charm on the various strange creatures there, but it doesn't work as expected. Meanwhile, Samurai Jack is initially confused by this strange, over - confident man but then realizes they can work together to fight Aku.
One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.
They could be in a situation where Ponyboy gets sick and Johnny takes care of him. During this time, they reminisce about their past memories, like the time they first became friends. As Ponyboy recovers, they decide to do something special like paint a mural on a wall in their neighborhood. This not only shows their friendship but also gives a chance to add some creativity to the fanfiction.