The fanfiction combines the two universes by borrowing elements like the settings. The different villages in Naruto can be compared to the different nations in Avatar. In a harem - style story, a character might travel between these settings, meeting new characters from both. They might bring their own cultural values and fighting styles. So a Naruto character in the Earth Kingdom of Avatar might introduce new ways of combat or thinking. This interaction of different elements from both universes makes for an interesting mix in the fanfiction.
The combination also happens in terms of power systems. Ninjutsu from Naruto and bending from Avatar can be merged in interesting ways. For example, a character could try to use chakra to enhance their bending abilities or use bending techniques to improve their ninjutsu. This creates a unique blend of the two universes in the fanfiction. In the harem aspect, characters with different powers can attract each other, leading to more complex relationships. And as for the 'lemon' part, which is often about more mature or romantic content, it can add a different layer of relationship dynamics between the characters from the two universes.
Often, it combines them through crossovers. For example, a portal could open between the Naruto universe and Shinji's world, allowing characters to travel between them.
Typically, it combines the two universes by having characters interact. Naruto characters might find themselves in the magical world of Winx Club or vice versa. They would then have to adapt to the new environment and rules. But as for the 'lemon' part which might not be suitable, we should focus on the positive aspects of this combination like how Naruto's combat skills can be compared and contrasted with the Winx Club's magical battles.
It might also combine them by setting the Tetris game in the Hogwarts castle. So, instead of a plain background, you have the Great Hall or the Gryffindor common room as the backdrop for the game. The sounds of the game could be replaced with magical noises like spells being cast or the flapping of a hippogriff's wings.
By using the characters' unique abilities. For example, Naruto's ability to quickly learn new skills could be used when he's in Middle - earth. He could learn some elvish magic or the ways of the Rohirrim. And the hobbits' stealth could be something that Naruto admires and tries to incorporate into his ninja tactics.
The combination in 'Watch Dogs MLP Fanfiction' is often through the concept of displacement. A character from Watch Dogs suddenly finds themselves in Equestria or vice versa. Then they start to interact with the elements of the new world. The Watch Dogs' tech - savvy characters might try to understand and even use the magic in MLP as if it were a new form of technology. And the ponies would be exposed to advanced technology which is completely foreign to them. This creates a lot of interesting scenarios for storytelling.
The characters from both universes interact in various ways. The harem aspect comes in as Naruto's charm and unique abilities attract characters from SAO. The fanfic might also blend the cultures of the two worlds. For instance, Naruto's respect for his comrades from the ninja world could influence how he forms relationships in the SAO harem. There could be training arcs where Naruto teaches the SAO characters some ninja techniques, or vice versa, the SAO characters introduce Naruto to new virtual world strategies. This creates a rich blend of the two universes.
One way is through power systems. The biotics in Mass Effect and the chakra in Naruto can be related. Maybe a character in a fanfiction discovers that biotics are a form of chakra or vice versa. Also, the different races in Mass Effect and the clans in Naruto can interact in terms of politics and alliances. For instance, the Uchiha clan could form an alliance with the Salarians based on their shared intelligence and strategic thinking. And the stories can also use the different settings, like having a battle take place on a Mass Effect planet but with Naruto - style combat techniques.
It could use a portal or some sort of magic - tech device. For example, a magical experiment in the Harry Potter world goes wrong and creates a portal to the Marvel universe where Black Widow is. Or maybe a Stark Industries experiment accidentally taps into the magic of the Harry Potter world. This would be a simple and straightforward way to bring the two together.
Some fanfictions combine the two universes by having characters from both worlds meet in a neutral or new setting. For instance, a new island or city that is a melting pot of both Naruto - like ninjas and Black Lagoon - style mercenaries and criminals. Here, they interact, form alliances or rivalries, and the story unfolds with all the drama and action that comes from the clash of these two very different fictional cultures.
It can combine the two by having the characters cross over. For instance, Harry could be invited to MI6 to share his knowledge of dark magic as they face some sort of dark magical threat in the Muggle world.