In some 'caboose crossover fanfiction', the caboose might cross over into a post - apocalyptic world. It could be one of the last remnants of the old world, and survivors use it as a base or a means of transportation. The story could explore how the caboose's structure and history play a role in this new, desolate world. It could also involve the characters trying to restore the caboose to its former glory while also fighting off threats in the post - apocalyptic landscape.
First, decide on the two elements you want to cross over with the caboose. For example, if it's a caboose and a space adventure, think about how the caboose could exist in space. Maybe it's been modified for zero - gravity travel. Then, create your characters. Who will be in the caboose? What are their goals?
Maybe the Caboose could cross over into a world where the rules of combat are completely different. His Red vs Blue training would be put to the test, and he'd have to adapt quickly. For example, instead of using guns, they use magic or some other form of power. The Caboose might initially be confused but then find his own way to contribute.
In a crossover with a more fantasy - based world, a character like a wise old wizard could be paired with Caboose. The wizard could initially be frustrated by Caboose's lack of understanding of the new world's magic and customs, but over time, they could form an unlikely friendship. Caboose could teach the wizard about loyalty and friendship in his own simple way, while the wizard could teach Caboose some magic tricks.
One common theme could be adventure. The caboose might be on a journey and encounter the monster girls during that. Maybe they team up to face some challenges.
Well, it really depends on the size of the fan community. Red vs Blue has a decent following, and if the fanfiction manages to capture the essence of both the Caboose character and the Freelancer concept in an interesting way, it could be fairly popular within that niche. But overall, in the grand scheme of all fanfiction out there, it may not be as well - known as some of the more mass - market ones.
Maybe a fanfiction where they time - travel. Church is all about trying to find a way back to their original time, while Caboose is just having fun experiencing different historical events. They could end up in the middle of a medieval battle and Caboose accidentally becomes a hero, which both amuses and annoys Church.
Well, you can try looking on some popular fanfiction websites like Archive of Our Own. There might be a variety of stories related to caboose and monster girls there. Just search for the relevant tags and you'll be able to find some interesting reads.
Often, fanfics are created by passionate fans who want to explore different aspects of their favorite characters or universes. In the case of 'caboose is a freelancer fanfic', it could be an individual who really likes the Caboose character and had the idea to put him in the role of a freelancer. They might be part of a fan group or just a lone creator, but without more information, it's difficult to determine the exact creator.