One main theme is friendship. Just like in the game, many short stories focus on the relationships between the characters, such as the unlikely friendship between a human and a monster. Another theme is redemption. Some stories might show how a character who has made mistakes tries to make up for them.
Well, mystery is a big one. Given that 39 clues is centered around mystery, it's often incorporated into the Undertale setting in these fanfictions. Also, friendship and cooperation. Just like in the original works, the characters in the fanfiction might team up to solve problems or face challenges together. And sometimes, there's a theme of self - discovery as the characters navigate through the combined worlds of 39 clues and Undertale.
One common theme is probably the exploration of relationships between male characters in the Undertale world. It could be about how they support each other and grow closer.
Another theme is the struggle between good and evil. The ocs can be faced with moral choices, whether to side with the more 'good' characters in Undertale or be tempted by the 'evil' forces. This adds depth to the story and makes it more interesting.
One common theme is the change in relationships. For example, how the character's partner or friends react to the pregnancy. Another theme is the anticipation and fear of the unknown. Since the Undertale world has its own unique elements, the pregnancy might bring new challenges and uncertainties. Also, the theme of protection often comes up, with the character and those around them being protective of the unborn.
The Genocide Route in Undertale can be seen as having elements related to self - destruction on a metaphorical level. When the player goes on this extremely violent path, it's like the world is being destroyed, and the characters within it. This can be related to suicidal tendencies in that it's a complete annihilation of the in - game world which might parallel a character's own self - destruction if they were real. It shows how extreme actions can lead to a very dark and 'dead - end' state, much like how suicidal thoughts can lead to a tragic end.
Friendship is also a big theme. The undertale characters already have strong bonds, and in the ABDL fanfiction, these bonds are often tested and strengthened through the unique situations. They support each other in dealing with the new elements of ABDL in their world.
Love and acceptance are common themes. Just like in any relationship story, in gay Undertale stories, the characters often have to face the challenge of being accepted by their friends, family (if applicable in the Undertale context), and the community around them. They also deal with self - acceptance, realizing and coming to terms with their own sexual orientation within the framework of the Undertale world.
One main theme is choice. The player's choices throughout the game, like whether to fight or spare a monster, greatly impact the story. Another theme is friendship, especially seen in the pacifist route where the human forms bonds with the monsters.
One common theme is self - discovery. The monster OCs often start out not really knowing who they are or what they can do, and then through their adventures in the Underground, they learn more about themselves. For example, they might discover hidden powers or a new purpose in life.