A sense of duty is often a theme. Timmy feels it's his duty to protect Trixie, whether it's because he has feelings for her or just because he's a good - hearted person. This sense of duty drives his actions, and his getting hurt is a consequence of fulfilling that duty. It also adds an element of drama and tension to the fanfiction.
The theme of heroism is also present. Timmy becomes the hero in these stories, even if he gets hurt. His actions inspire Trixie to be braver herself. And there could be a theme of redemption, especially if in the normal story arc Trixie has been mean to Timmy, but now she has a chance to make it up to him as he's injured because of her.
One possible plotline could be that Timmy and Trixie are in a magical forest when a group of dark fairies attacks. Timmy uses his fairy - godparent powers to shield Trixie from their harmful spells, getting hurt in the process. Trixie then has to find a way to help him, like searching for a special healing flower.
One common theme could be the reactions of their friends and family. Another might be the challenges they face in preparing for the baby, like setting up a nursery. Also, there could be themes about their relationship growing stronger or facing strains during the pregnancy.
One common theme is sacrifice. Shinra is willing to put himself in harm's way for Maki, which shows his selfless nature. Another theme could be the growth of their relationship. After such an event, they might become closer and understand each other better. Also, heroism is a theme. Shinra is acting like a hero by protecting Maki, and this can be explored further in terms of how Maki views him as a hero and how it affects his own self - image.
One common theme could be self - sacrifice. Zim getting hurt while protecting Gaz shows that he is willing to put himself in harm's way for her. Another theme might be the unexpected bond that forms between them as a result of this act of protection.
One scenario could be when Timmy tries to use his fairy godparents' magic in a really wild way, like trying to fly without proper training. He might end up crashing into things and getting hurt. Another could be when he gets involved in a fight with some of the bullies in his school in the fanfiction world. They might push him around and he could get bruises or minor injuries.
The theme of hope in the face of adversity is also present. Despite Levi getting hurt, the fanfiction may show how the characters around him and he himself still hold on to hope for recovery and victory in the long run.
One common theme is friendship. When Tails gets hurt, his friends like Sonic usually come to his aid. This shows the strong bond between them.
One common theme is sacrifice. Sans often gets hurt while protecting someone or something he cares about, like his friends or the Underground. It shows his selfless nature.
One common theme is the test of the relationship between Belle and the Beast. When Belle gets hurt, it shows how the Beast reacts and whether he truly cares for her. Another theme could be the idea of sacrifice. Maybe Belle gets hurt while trying to protect something or someone in the story.
One common theme is sacrifice. Natsu is willing to put himself in harm's way for the princess, which shows his selfless nature. Another theme could be loyalty, as he is loyal to the princess and to the idea of protecting the innocent. Also, there might be a theme of recovery, as Natsu has to recover from his injuries, which can show his strength and the support he gets from his friends and the princess herself.