Maybe a story where 18 and Krillin decide to open a martial arts school. They have to deal with different types of students, and it shows their relationship growing as they work towards a common goal. It can include how Krillin uses his knowledge and 18 her strength to train the students.
A really interesting fanfic idea could be set in a post - apocalyptic version of the Dragon Ball universe. Android 18 and Krillin have to fight to protect the few remaining survivors. They use their unique skills, with Android 18's android powers and Krillin's martial arts. Their relationship becomes a source of hope for those around them, as they prove that love can still exist even in the harshest of times.
One interesting storyline could be about their family life. Maybe Android 18 and Krillin decide to take a vacation with their daughter, Marron. They could face various challenges during the trip, like dealing with villains who target their family. Another could be a story where Krillin has to rescue Android 18 from an old enemy who has found a new way to control her. This would test their love and Krillin's strength.
One idea could be focusing on Krillin's over - protective nature during 18's pregnancy. He could be constantly worrying about her safety and the baby's well - being, like making sure she has all the right nutrients and is not overexerting herself.
In some fanfictions, Krillin might time travel to the era of the Saiyans' first arrival on Earth. He could then try to change the outcome of the battle, perhaps by warning Goku earlier or finding a way to defeat the Saiyans with his own skills and wits. This would be a really exciting story as it would completely change the course of the Dragon Ball universe.
Well, for one, their relationship in the original story has a lot of potential for exploration in fanfiction. Their different personalities, Krillin being the kind - hearted and often comical character and 18 being more reserved yet strong, make their interactions, especially a kiss, very exciting to read about.
Another could be a 'what if' scenario. Like what if a certain character got injured along the way and how it would change the dynamics of the group. This could involve exploring the relationships between the characters as they deal with the unexpected situation.
A plotline where Goku and Krillin get lost in an uncharted part of the universe and have to find their way back home. Along the way, they meet new alien species, learn new fighting styles, and of course, have each other's backs. It would be an adventure - filled story that focuses on their friendship and survival skills.
One interesting Super Krillin fan fiction could be about Krillin becoming the strongest Z - fighter through a new kind of training. Maybe he discovers a hidden power within himself that no one knew existed.
One interesting storyline could be about the characters' exploration of a new, mysterious part of the Hollows. They might encounter strange creatures and have to use their unique abilities to survive.
There are fanfictions where the Warehouse 13 agents go on a mission to recover an artifact that has been lost for centuries. This artifact could hold the key to saving the world from a great danger. Another type of storyline could be about a character from the Warehouse getting trapped in an artifact - like a mirror where they are stuck in a different dimension. And then the other agents have to find a way to get them out. There are also fanfictions that deal with the internal politics of the Warehouse, with different factions vying for control over the artifacts.