Power and self - discovery are also common themes. Naruto is already on a journey of self - discovery in his own series, and when placed in the Adventure Time world, he continues to learn more about himself. His ninja powers are also a point of interest, as he has to figure out how they work in a world with different rules of magic and combat, which ties into the theme of power.
One common theme is the clash of cultures. Naruto comes from a world of ninjas and strict training, while Adventure Time has its own very different and often wacky culture. Fanfictions often explore how Naruto adapts to this new world and how the characters from Adventure Time react to his presence.
Friendship is also a big theme. Just like in both the original Naruto series and Adventure Time, fanfictions in this crossover often focus on the new friendships that are formed. For example, Naruto might become friends with Finn and Jake, and they go on adventures together, learning from each other and growing as characters through their friendship.
Power - up is also a common theme. As Naruto faces new challenges in these fanfictions, he often gains new powers or abilities. This ties in with his adventures and also makes him more appealing in the context of the harem. Additionally, the theme of friendship remains, although it may be overshadowed by the romantic relationships at times. His friends from the original series still play important roles in his adventures in the harem fanfiction.
Another theme is the fear of losing a friendship or relationship. In the land of Ooo, relationships are important. When a character is jealous, it's often because they're afraid that the new person in their friend's life will replace them. This is seen in fanfictions where characters like Marceline get jealous when they think someone is trying to take their place in Simon's life.
One common theme is self - discovery. Fern is often portrayed as trying to figure out who he really is, especially considering his unique origin in the Adventure Time universe.
Self - discovery is also a significant theme. Jake is constantly learning about himself, his abilities, and his place in the Adventure Time world. In fanfiction, this can be seen when he faces challenges that force him to reevaluate who he is. Additionally, the theme of friendship is ever - present, as Jake's relationships with his friends are a huge part of what makes the Adventure Time universe so appealing.
One common theme is friendship. Just like in the original Adventure Time, characters in middle school fanfictions often rely on their friends to get through tough situations. For instance, Finn and Jake's bond remains strong even when they face challenges like bullies at school.
One common theme is self - discovery. Finn, as a dragon, has to figure out who he is now and how to fit into the world. Another theme is power and responsibility. With his dragon powers, he has new abilities but also new responsibilities. For example, in many fanfictions, he has to protect the weak or save the Land of Ooo from threats.
Power and magic are also common themes. The male OCs might discover they have special powers or they have to deal with magical artifacts. For example, an OC might find a magic sword that gives him unique abilities. Also, the theme of family often comes up. Maybe the OC is searching for a long - lost family member or has to deal with the idea of creating a new family within the Adventure Time universe. This all adds depth to the stories and makes them more engaging.
The theme of sacrifice is quite prevalent. Characters might sacrifice their own desires or safety for the sake of their loved ones. In many 'Lost in Love' fanfictions, we see Marceline giving up parts of her vampire nature to be with Princess Bubblegum. Also, the theme of acceptance is important. Accepting the flaws of the loved one and the oddities of the Adventure Time world is often explored in these fanfictions.
One common theme is friendship. Finn and Marceline have a unique friendship that often gets explored in fanfiction. They come from different backgrounds, Finn being a human hero and Marceline a vampire, and how they bridge those differences in their friendship is a popular theme. Another is adventure. Since they live in the Land of Ooo, they often go on wild adventures together in these stories.
The theme of redemption can also be found. If Finn is somehow influenced by the demons in a negative way, he tries to find a way to redeem himself. There are also themes related to the unknown and exploration. The demon world is often a new and mysterious place for Finn to explore, which brings in the theme of discovery.