One interesting plot could be a female Necrofriggian facing a crisis in her home planet and having to seek help from Ben. She might have unique powers that are different from the male Necrofriggians, and Ben has to figure out how to work with her. For example, she could have a special ability to freeze time in a small area, which comes in handy during battles.
Maybe a story where a female Necrofriggian is trying to prove herself in a male - dominated society within her species. Ben gets involved when he accidentally stumbles upon her struggle. She shows great courage and determination, and together they go on a journey to find a lost relic that could change the power dynamics in her world.
A plot could revolve around a female Necrofriggian who is an outcast because of her different beliefs. Ben meets her and they form an unlikely alliance. She has the power to communicate with ancient ice spirits, and with Ben's help, they try to stop an evil force that is melting the polar ice caps on her planet.
In this fanfiction, it could be that the Necrofriggian babies are the result of some sort of experiment gone wrong. Ben stumbles upon them and realizes that he is the only one who can help. He has to figure out how to reverse the effects of the experiment while also dealing with the fact that the babies are in a very fragile state. He might enlist the help of his friends, but also face challenges from those who don't want the experiment to be reversed.
To create a compelling female Necrofriggian character, think about her appearance. She might have a different coloration than the male ones, like a more bluish - white hue. Her abilities should be related to her character arc. If she's on a journey of self - discovery, her ice powers could start out weak but grow stronger as she learns more about herself. Also, her relationships are key. Maybe she has a best friend who is from a different species entirely, which shows her open - mindedness.
Another possible antagonist could be an alien scientist who was involved in the creation or discovery of the Necrofriggian babies. This scientist might have his own evil plans for the babies and sees Ben as an obstacle in his way. He could be using his advanced technology to try and capture the babies from Ben.
Another plot might involve Ben and Kai getting accidentally transported to a parallel dimension where things are very different. They have to find a way back home while also dealing with the strange new versions of their friends and foes. Along the way, they discover new things about each other and their feelings start to change in this unfamiliar setting.
One interesting plot could be Ben exploring a new alien world during his summer vacation. He discovers a rare alien species and has to use his Omnitrix to protect them from a villain who wants to capture and sell them. Another plot might involve Ben and his friends going on a beach vacation, but they end up having to deal with an underwater menace using their combined skills.
A cool plot could be that Ben 10's Omnitrix malfunctions near Poison Ivy. This causes some of his alien DNA to mix with her plant - based essence. As a result, they both gain new and strange powers. They then have to figure out how to control these powers while also dealing with villains who want to use this new situation for their own evil plans. Or, there could be a story where Poison Ivy is initially suspicious of Ben 10 because of his alien nature. But when she sees how he respects nature in his own way (through his alien forms' relationships with different environments), she warms up to him. Together, they could go on a journey to save a forest that is being destroyed by a powerful and greedy corporation. Ben 10 uses his strength and agility as different aliens, and Poison Ivy uses her plants to slow down the corporation's machines and workers.
In some fanfictions, Ben might travel to a dimension where his family members have different personalities or abilities. This could lead to a lot of self - discovery for Ben as he has to deal with these new versions of his loved ones. He may also have to find a way to get back to his own dimension while facing challenges specific to that new dimension.
Another plot could involve Ben in his female form getting involved in a different social circle within the alien world. She could meet other female aliens who teach her about their culture and powers that are specific to females in their species. This would not only add new elements to the story but also expand the world - building of the Ben 10 universe.
The unique nature of the Baby Necrofriggian. It's a different take on the regular Necrofriggian in the Ben 10 series. People are drawn to seeing how it behaves as a baby.
Yes, there are some interesting ones. You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Ben 10 Baby Necrofriggian' and you'll likely find a variety of stories with different takes on the concept.