One idea could be a crossover adventure where Beast Boy and Storm team up to stop a powerful villain that threatens both their worlds. They could start off not trusting each other due to their different backgrounds, but as they face challenges together, they learn to respect and rely on each other's powers.
Well, a plot could revolve around Beast Boy being sent to the X - Men's universe by accident. He meets Storm there. Since Beast Boy can transform into animals and Storm can control the weather, they could have a really cool dynamic. Maybe there's a natural disaster in the X - Men's world that they need to stop together. As they work side by side, they start to share their life stories, their hopes and fears, and develop a mutual respect. This could lead to a deeper bond between them, and they might even start to think about how their two teams could collaborate in the future.
A possible plot could be that there's some sort of interdimensional rift that brings Beast Boy and Storm together. They have to work together to close the rift while also dealing with their different powers and personalities. Beast Boy's ability to transform into animals and Storm's control over the weather could create some really cool action scenes as they face various threats.
Beast Boy's power to transform into animals could complement Storm's weather - controlling abilities in many ways. For example, if they are in a battle and Storm creates a powerful windstorm, Beast Boy could transform into a bird and ride the winds to gain a strategic advantage. Or if they are in a desert environment, Beast Boy could turn into a camel while Storm creates a rain cloud to bring water.
Beast Boy's power to transform into animals could be affected by Storm's weather control. For example, if Storm creates a strong wind, it could either help Beast Boy fly faster in his bird form or make it difficult for him to stay in the air if he's not used to such strong winds. Also, if Beast Boy turns into a cold - climate animal like a polar bear, Storm could make the area around him even colder, enhancing his natural abilities in that form.
You can try fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms usually have a wide variety of fan - created stories. Just search for 'Teen Titans Beast Boy X - Men Storm' in their search bars and see what comes up.
There's also 'The Bond Between Us'. This fanfic delves deep into their connection. It starts with a simple mission that goes wrong, and in the process of survival, Beast Boy and Raven discover new feelings for each other. It has a lot of character development for both of them.
In Teen Titans Beast Boy x Raven fanfic, the power dynamics can be really interesting. Beast Boy has the ability to transform into various animals, which is a very physical and adaptable power. Raven, on the other hand, has her dark magic and psychic abilities. In some fanfics, their powers interact in unique ways. Maybe Beast Boy's animal instincts help Raven better understand her own more primal side related to her powers, or Raven's magic can be used to enhance Beast Boy's transformations in some way.
A less common but still interesting trope is the 'role - reversal'. In some fanfics, Beast Boy might be the more serious and responsible one for a change, while Raven becomes more carefree. This can lead to a fresh take on their relationship and how they interact with each other. It also allows for exploring different aspects of their personalities that might not be as obvious in the original series.
A Beast Boy x Storm fanfiction could center around a crossover adventure. They could be brought together by a powerful magical artifact that has the potential to destroy both of their worlds if not stopped. Their combined powers would be interesting to write about, with Beast Boy's agility and animal forms complementing Storm's control over the weather.