It could be one of the well - known ninja characters. For example, if the fanfiction writer wants to create a romantic and unexpected pairing, it might be Kai. Their relationship could be explored further as they prepare for the baby.
One possible storyline could be about how the other characters in Ninjago support Seliel during her pregnancy. They might help her prepare for the baby's arrival, like building a nursery or finding special items for the baby.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of Ninjago fanfictions, and you're likely to find some great Cole x Seliel ones there. Another option is FanFiction.net, which also has a wide range of stories in the Ninjago fandom.
One great Cole x Seliel fanfiction could be 'The Bond of Earth and Shadow'. It explores how their different elemental powers bring them together in a world full of challenges. Another one might be 'Cole and Seliel's Adventure', where they team up to face a new and powerful enemy. And there's also 'Love in the Ninjago Realm' which delves into the budding relationship between them in the context of the overall Ninjago universe.
One common theme is the discovery of self. In the context of Cole x Seliel fanfic, both characters might learn more about themselves through their relationship with each other. Also, sacrifice is a theme that can be found. They may be put in situations where they have to sacrifice something for the other's well - being or for the greater good of Ninjago. And of course, there's the overarching theme of adventure, as they are part of the Ninjago world which is full of exciting adventures.
One popular Ninjago Cole x Seliel fanfic is 'A Bond Beyond'. It beautifully explores their relationship development. Another great one could be 'Cole and Seliel: The Unlikely Pair' which focuses on how they overcome differences. There's also 'Seliel's Choice' that delves into her perspective when it comes to Cole.
I'm not sure specifically about 'Ninjago Pixal pregnant' fanfiction. There are many fanfiction platforms out there like FanFiction.net and Archive of Our Own. You could try searching on those platforms to see if such a story exists.
In the context of Ninjago, Garmadon could be a likely candidate as the father. Given their past relationship and history together, it would make sense in the lore of the series. Their connection has always been complex and a pregnancy between them would add another layer to their story.
Fanfiction.net is also a good place to search. There are many Ninjago fanfictions there. However, the search function might not be as refined as AO3, so you may need to dig a bit deeper. But it's still worth checking for 'Ninjago pregnant fanfiction'.
Well, one possible plot could be that Pixal discovers she's pregnant and she and her partner (whoever that might be in the fan - created scenario) have to deal with the news. They might face challenges like how to balance their duties in the Ninjago world with the upcoming arrival of a new life.