Overcoming challenges. Maybe he has trouble controlling his powers at first, and the fanfiction could be about how he faces those difficulties. It could be things like accidentally shifting into the wrong animals at the wrong times, and then learning how to control it better with the help of his friends.
Growth and discovery. Since he's young in these fanfictions, it often shows his journey of learning about his powers and the world around him.
A common theme is the struggle between Beast Boy's humanity and his vampiric instincts. Since he's a beast at heart already, the addition of vampirism can create a complex internal conflict.
One common theme is inheritance. The baby is often shown to inherit certain traits from both Beauty and the Beast, like Belle's love for books and the Beast's physical strength or connection to the castle's magic. Another theme could be acceptance. Since the Beast was once an outcast, the fanfictions may explore how the baby is accepted in the world around them, whether it's by the villagers or the magical beings in the castle.
Another theme is the idea of magic inheritance. Fans often write about whether the baby will inherit Beast's strength or Belle's intelligence, or perhaps some new form of magic altogether. It's a way to expand on the magical elements already present in the original story.
One common theme is growth. The baby boy often goes through different experiences that help him grow and mature.
One common theme is the struggle with his new vampiric nature. For example, he might struggle with the urge to drink blood while still trying to maintain his heroic values. Another theme could be his relationship with the other Teen Titans. They might be afraid of him at first or try to find a way to cure him.
One common theme is conflict. It could be a conflict of ideals where Robin's more strict and by - the - book approach clashes with Beast Boy's more laid - back nature, leading to situations where Robin's actions or words end up hurting Beast Boy. Another theme might be redemption. After hurting Beast Boy, Robin has to find a way to make it up to him, which could involve self - reflection and changing his behavior.
Another theme could be his journey towards recovery. In these fanfictions, he might find support from unexpected characters, like Raven. They could help him heal by providing a safe space and understanding, which is important for someone who has been abused.
One common theme is self - discovery. The OC often enters Beast Boy's world and in the process discovers new things about themselves, just as Beast Boy also learns more about his own feelings. For example, in many stories, the OC might be a new recruit to the Teen Titans and through her interactions with Beast Boy, she figures out her own strengths and weaknesses.
One common theme could be the exploration of Beast Boy's inner strength as he overcomes the abuse. He might find ways to heal and grow from the traumatic experience.
Power corruption is a frequent theme in 'Beast Boy Dark Side' fanfiction. His newfound, darker powers might make him feel invincible or above the rules. This can lead to him making bad decisions and alienating those around him. Additionally, themes of forgiveness and acceptance are common, as his friends have to decide whether to forgive him for his actions while in the dark side and accept him back into the group.