Poppy would probably be really into the lemon - inspired world in the fanfiction. She might start decorating everything with lemons. Branch would be more practical, like trying to figure out if the lemons are edible or not.
Friendship is a very common theme. Their bond as friends is often explored, like how they help each other out in various situations. For instance, when one of them is in trouble, the other is always there to rescue or support.
There could be an evil wizard who has been banished to a lemon - less dimension. When he senses that Poppy and Branch are getting close to unlocking the power of lemons, he tries to use his dark magic to stop them. He fears that if they succeed, they will be able to use the lemon's power to banish him even further, so he becomes the antagonist in their adventure.
I'm not sure specifically about Trolls Poppy and Branch pregnant fanfiction. Fanfiction can cover a wide range of ideas and scenarios, but not all of them are easy to find. You could try searching on major fanfiction websites, but keep in mind that the official Trolls franchise may not have such storylines.
Poppy and Branch are such fun characters from Trolls. In lemon - themed fanfiction, they might go on a zany adventure in a lemon - scented land. Maybe they discover a hidden lemon grove that has magical powers. It could be a place where their friendship is tested as they face challenges like a lemon - stealing villain.
One common theme could be the anticipation and preparation for the new arrival. This might involve Branch and Poppy getting their home ready, gathering supplies, etc. Another theme could be how their relationship evolves during the pregnancy, becoming more loving and protective.
One great 'Trolls Poppy x Branch Fanfiction' is 'Poppy and Branch's Adventure in the Enchanted Forest'. It has a really engaging plot where they go on a quest to find a magical flower to save their village. The way the author describes their relationship development is very sweet.
A fanfiction could revolve around Branch's past before he became the survivalist we know. Poppy discovers some long - hidden secrets about him that change their relationship dynamics. She has to help him come to terms with his past while also dealing with the current threats to their troll village.
If 'branch and poppy' are your own created characters, you can look for general fanfiction writing groups or forums. Some writers there might be interested in writing fanfiction about them. Another option is to search on Wattpad. It has a wide range of user - generated stories, and who knows, you might stumble upon a great 'branch and poppy kiss' fanfiction.