What are some interesting plot ideas for a Pokemon time travel fanfic?

One interesting plot could be Ash traveling back to the time of the first Pokemon ever discovered. He could witness the origin of Pokemon-human relationships and perhaps influence how they evolved over time. Another idea is Ash traveling to a future time where Pokemon have developed new and strange abilities, and he has to adapt quickly to this new environment. Also, he could go back in time to prevent a great Pokemon disaster that was hinted at in the original series.

One idea could be Batman traveling back to the time when Gotham was first founded. He could try to prevent the seeds of corruption from being sown. Another plot could be him traveling to a future Gotham that has been completely overrun by villains and he has to find a way to change that future by altering events in the past. Or perhaps he travels to different time periods to gather knowledge and technology to better fight crime in his own time.

A cool plot could be that a villain from the future uses time travel to go back and change the past in order to gain ultimate power in the Arrow universe. The heroes then have to figure out a way to reverse the changes and stop the villain. This could involve a lot of action scenes as they race against time to save their world from this altered timeline.

Maybe a character from the future RWBY world travels back to the time when the Huntsman academies were first founded. They could introduce new fighting techniques or ideas that were developed in their time, which would have a huge impact on how the early Hunters and Huntresses are trained.

One idea could be that Luffy travels back to the time when Gol D. Roger was still alive. He could meet the Pirate King and learn some of his secrets. Maybe Roger gives him a hint about the One Piece that changes Luffy's understanding of his journey.

A really interesting plot would be if a time - traveling villain from another dimension comes to the HTTYD world and tries to change the past to make dragons evil. Hiccup and his friends then have to travel through different time periods to stop this villain. Or perhaps the characters travel to a time when there were giant, prehistoric dragons that they have to deal with, and they learn new ways of dragon - riding from the ancient Vikings who tamed those behemoths.

One idea could be that Ash and Serena travel back to the very beginning of Ash's journey. They could use their knowledge of future events to help Ash catch Pokémon more effectively, like getting a Pikachu right away without the initial struggle. Another plot could involve them traveling to a time when a powerful and rare Pokémon was last seen, and they have to work together to find it and protect it from evil organizations.

One idea could be that Ash and May travel back to the time when the first Pokemon were discovered. They could witness the first encounters between humans and Pokemon and learn about the origin of Pokemon battles. Another plot could involve them traveling to a future where Pokemon have evolved in unexpected ways, and they have to adapt to these new forms of Pokemon. Maybe they also meet their future selves and gain insights into their own destinies.

One idea could be that the time travel orb sends Naruto to a crucial point in the past where he can prevent a major tragedy. For example, he might be able to stop the Uchiha massacre, which would change the entire future of the ninja world. This would lead to different alliances and power dynamics.

One idea could be that Batman Beyond travels back to the time of the original Batman and has to team up with him to stop a villain who has also time - traveled and is trying to change history for his own evil gains.