Well, the Urusei Yatsura manga ended with a mix of closure and some bittersweet moments. The resolutions for the characters were handled in a way that felt both fitting and emotional. It tied up loose ends while still leaving a lasting impression.
One popular theme is the exploration of different relationships between the characters. For example, how Lum and Ataru's relationship could develop in different ways, like a more serious or comical take on their love - hate dynamic. Another theme is alternate universes, where the characters might have different personalities or live in different settings. For instance, an AU where the characters are in a modern-day high - tech world instead of the more traditional setting of the original. Also, there are fanfictions that focus on the backstories of secondary characters, giving them more depth and development.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, including Urusei Yatsura. Just search for 'Urusei Yatsura' on the site and you'll find a bunch.
Lum and Ataru are the most written - about characters. Their complex relationship provides a lot of material for fanfiction writers. Lum's alien nature and her love for Ataru, as well as Ataru's womanizing ways and his reluctant acceptance of Lum, make for many interesting storylines.
Sure. One popular Urusei Yatsura fanfic is 'A New Adventure for Lum and Ataru'. It continues their story in a new and exciting way. Another one could be 'The Friends of Urusei Yatsura', which focuses on the group dynamics of all the characters.
Another idea is that Greninja gets exposed to some kind of meta - human - creating substance in the DC universe and gains new powers. It could then join the Teen Titans, sharing its unique Pokémon abilities with the group. It would be interesting to see how Greninja interacts with characters like Robin, Starfire, and Cyborg, and how it uses its powers in battles against the Titans' enemies.
In this fanfiction, Skynet could find a way to connect to the Matrix. It might try to take over the Matrix and use it to control more humans. The machines in the Matrix might initially resist, but Skynet could offer them a deal to share power over humanity.
One idea could be that Greninja, being a ninja - like Pokémon, somehow gets transported to the Naruto universe. It could team up with Naruto and use its water - based attacks in combination with Naruto's Rasengan. Maybe Greninja's ability to blend into the shadows could be used in stealth missions in the Hidden Leaf Village.
One idea could be a St Trinians crossover with Sherlock Holmes. The girls of St Trinians could get involved in a mystery that Sherlock is also investigating. Their unorthodox ways might both amuse and frustrate the great detective.
It depends. A crossover might be a novel if it has a developed plot, characters, and narrative structure typical of a novel. But it could also take other forms like a comic or a short story.