One idea could be exploring how his parents' personalities influenced Beast Boy's powers. Maybe his father was a scientist who was working on some genetic experiments that led to Beast Boy's unique ability to transform. Another could be a fanfic where his mother was from a tribe with a special connection to nature, which also played a part in his powers.
A great fanfic idea could be about Beast Boy's parents' backstories. For example, his parents could have been part of a secret organization that was trying to protect the world from some ancient evil. When they had Beast Boy, they knew he would be special and hid him away to protect him from the danger. As he grows up, he discovers his parents' past and has to decide if he wants to follow in their footsteps.
One idea could be that Beast Boy discovers he has admirers from different dimensions. Each girl from these dimensions has a unique power and personality. For example, a water - controlling mermaid - like girl who is shy but drawn to Beast Boy's kind nature. Another could be a girl from a magical realm who is a powerful sorceress and sees Beast Boy's potential in a different way than others.
Perhaps a fanfic where Beast Boy has to prove himself to a new group of heroes. He goes through a series of trials that really test his limits and his badass side comes out as he overcomes each one, showing his unique combat skills using his shapeshifting.
One idea could be Beast Boy going back in time to his younger self and having to deal with his past insecurities while still having his current powers and knowledge. Another could be an age - play scenario where he is magically turned into a child and his teammates have to take care of him and protect him from villains who might take advantage of his vulnerable state.
A really cool plot for a Beast Boy Titans North fanfic would be if there was a mystery in Titans North related to some ancient animal - themed artifacts. Beast Boy, with his connection to animals, gets drawn into the mystery. He could discover that these artifacts have the power to either enhance or disrupt his powers. Along the way, he also has to deal with his own insecurities about being different from the other Titans in North, as his powers are more nature - based compared to some of their high - tech or super - strength powers.
Obviously, Beast Boy's parents are the main characters in such fanfics. But other popular characters could be the other Teen Titans. They might play a role in helping Beast Boy discover more about his parents, like Raven using her magic to uncover hidden secrets or Cyborg using his technology to analyze any clues related to his parents.
A plot could involve a new villain who targets their relationship. This villain could create illusions or situations that make Raven and Beast Boy question their feelings for each other. But as they fight through these false obstacles, they actually end up realizing that their love is stronger than they thought. For instance, the villain might make Raven think that Beast Boy is only interested in her because of her powers, but Beast Boy then shows his true self and his genuine love for her beyond any powers or abilities.
One idea could be to explore the backstories of the characters in more detail. For example, you could write about how the Beast came to be in his situation. Another idea is to create a new adventure for them, perhaps they encounter a powerful magic item that causes chaos. You could also focus on the relationship between the Beast and the Harlots, and how it might develop in different circumstances.
The 'beast boy mask fanfic' might have an interesting plot. It could involve a mystery where the mask has some special powers or a connection to an unknown force. This could lead to exciting adventures for Beast Boy and his friends as they try to uncover the secrets of the mask.
A 'baby beast boy fanfic' might focus on his relationship with the other Titans when he's in a baby form. He could be super cute and the others have to take care of him, like Raven trying to use her magic to keep him entertained or Cyborg building little toys for him.
One idea could be to create a fanfic where Timmy wishes for a time - traveling adventure with his fairies. He could go back to the days when his parents were kids and see how they were like then. Another idea is to have a story where Cosmo and Wanda accidentally switch powers with other magical creatures in Fairy World and Timmy has to help them get their powers back while dealing with the chaos it creates.