A fanfiction could explore a scenario where Big Chill gets injured during a battle and Swampfire has to take care of him. In the process of healing, they start to understand each other's vulnerabilities better. Swampfire's ability to create warm environments helps Big Chill recover, and this shared experience deepens their bond.
First, focus on their personalities. Swampfire is strong and earthy, while Big Chill is cool and elusive. Build a plot that makes use of these traits. For example, Swampfire could be the one to initiate a friendship, but Big Chill is hesitant at first. Second, create a conflict, like an alien race that is targeting both of them. Third, show their relationship evolving through small moments, like sharing a victory or a quiet moment under the stars.
It could be really exciting. The Benwolf transformation in Ben 10 is one of the coolest. In a fanfic, the author might explore new powers, new adventures that Ben could have in his Benwolf form. Maybe there are some unique battles against enemies that we haven't seen in the original series. It could also delve into how Ben feels when he transforms into Benwolf, his thoughts and emotions, which can add a whole new layer to the character.
You can expect some cool action scenes. Since Benwolf has unique abilities like enhanced strength and agility, the fanfic might showcase him using these powers in battles. It could also have some mystery elements, like Benwolf uncovering a secret about his transformation that was previously unknown.
Well, it could be about Ben getting an unexpected Highbreed transformation. Maybe he's on a mission and somehow gets exposed to some strange Highbreed energy. Then he has to deal with new powers and also the fact that he looks like a Highbreed, which might make his friends and enemies view him differently.
One interesting story could be about Ben transforming into a rare, mythical animal. For example, he turns into a phoenix - like alien with the ability to rise from ashes and fly at supersonic speeds. This transformation could be a result of some new alien technology he discovers. Another could be a story where he transforms into a giant sea - creature to save a sunken ship full of people. He uses his new form's strength and aquatic abilities to lift the ship to the surface.
It could be an evil Highbreed scientist. This scientist might be obsessed with creating a new breed of Highbreeds that combines the power of the Omnitrix with their own genetic superiority. He sees Ben as the perfect test subject for his experiments and will stop at nothing to achieve his goals.
First, know the Ben 10 universe well. Understand the rules of his transformations and the characteristics of the aliens he can already turn into. Then, when creating the animal transformation, give it a unique backstory. For example, if he turns into a dragon - like animal, explain why this transformation is possible and what special powers it has. Also, focus on the conflict. Maybe the new animal form attracts unwanted attention from a new enemy. This will keep the story engaging.
One common theme could be the contrast between their powers. Swampfire with his plant - based abilities and Big Chill with his ice - related powers. This contrast can create interesting dynamics in their relationship.
There might be some, but it could be a bit of a niche. Yaoi fanfiction often focuses on the relationship between characters in a romantic or sexual way. However, the availability would depend on how popular these two characters are among the fanfiction writing community. You may need to dig through different categories and tags on relevant platforms to find any good ones.