Another storyline could be a time - travel adventure. Trunks, with his experience in time - traveling, takes Android 17 to a different era. There, they encounter alternate versions of themselves and their friends. This leads to a series of events where they have to figure out how to get back to their own time while also dealing with the chaos they've caused in this new timeline. It could explore how Android 17 reacts to seeing different versions of the world and how he and Trunks adapt to survive.
One great storyline could be them teaming up against a new, powerful enemy that neither can defeat alone. They start off not trusting each other fully as they have different fighting styles. Android 17 is more of a lone wolf type, while Trunks is used to fighting alongside his friends. But as they battle, they learn to work together, with Android 17 teaching Trunks some of his unorthodox combat moves, and Trunks showing 17 the value of friendship and teamwork in a fight.
Another storyline could be a time - travel one. Android 21 somehow gets sent back in time and meets a younger Goku. This would be really interesting as she would have knowledge of future events and technologies. Goku, being his curious self, would be intrigued by her and want to learn from her. They could team up to prevent some of the future disasters that Android 21 knows about.
One popular Android game with a great storyline is 'Genshin Impact'. It has a vast and immersive world filled with diverse characters, each having their own backstories. The main story revolves around the Traveler's search for their lost sibling and in the process, uncovers the secrets of Teyvat. Another is 'Stardew Valley' which has a heartwarming story of starting anew in a rural area, building relationships with the villagers, and revitalizing the old farm. Then there's 'The Room' series. These are puzzle games but with an underlying mystery story that unfolds as you solve each room's puzzles, keeping players intrigued throughout.
In some fanfictions, there's a plot where Trunks and Android 18 are sent to a different dimension. There, they have to rely on each other completely to survive and find a way back home. This forces them to put aside their differences and work as a team, which in turn creates a deep emotional connection.
A frequent theme is also friendship. Given their different backgrounds - Android 17 being an android and Trunks being a half - Saiyan - exploring how they become friends and trust each other can be really interesting. Some fanfics also touch on the theme of sacrifice, where one of them might be put in a situation where they have to sacrifice themselves for the other or for the greater good in the Dragon Ball universe.
One popular Android's Trunks fanfic could be 'Trunks' New Adventure'. It might explore Trunks in a new and exciting situation, like facing an unexpected threat in a different timeline. Another could be 'Trunks and the Android Alliance', which could focus on his relationships with the androids in a more in - depth way.
One interesting storyline could be about Naruto having a different power origin. For example, instead of being the host of the Nine - Tails, he might gain his power from an ancient sage. This could change the whole dynamic of his character development and relationships in the story.
One popular Trunks x Android 18 fanfiction is 'A New Alliance'. It explores an alternate universe where Trunks and Android 18 team up against a new threat. They start off as reluctant allies but gradually develop a mutual respect and friendship that might lead to something more.
There's a fanfiction titled 'Unlikely Love'. In this story, Mirai Trunks and Android 18 are brought together by a strange time - travel anomaly. The story focuses on how they overcome their initial distrust. Android 18 is initially wary of Trunks due to his Saiyan heritage, but as they spend more time together, they realize they have more in common than they thought. It's a heartwarming tale of two very different characters finding love.
One common storyline could be their adaptation to human society. They might struggle with understanding human emotions and relationships. For example, in some fanfictions, they could be learning about friendship in a more in - depth way. Another could be their adventures together, perhaps using their unique powers to solve problems in the world they live in.
One possible storyline could be them teaming up for a tournament. Gohan's martial arts skills combined with 18's strength would make for an interesting duo in the fighting arena. They could face various opponents and learn to trust each other's abilities more.