Pairing Eren from 'Attack on Titan' with Twilight Sparkle from 'My Little Pony' could be really interesting. Eren is driven by his desire for revenge and to save his people, while Twilight is all about knowledge and using magic for the good of Equestria. Their meeting could lead to a clash of ideals at first. Eren might not understand Twilight's peaceful and knowledge - seeking ways, and Twilight might be shocked by the violence in Eren's world. But as they get to know each other, they could learn a great deal from one another and combine their strengths to face challenges.
Levi from 'Attack on Titan' and Rainbow Dash from 'My Little Pony' could be a great pair. Levi is known for his combat skills and no - nonsense attitude. Rainbow Dash is confident and loves to show off her flying skills. If they were in a situation together, Levi might be initially annoyed by Rainbow Dash's show - off nature, but would soon come to respect her abilities. Rainbow Dash could learn discipline from Levi, and they could fight side by side against the titans, with Rainbow Dash using her speed and Levi his combat expertise.
One possible plot could be that the ponies from Equestria somehow end up in the world of 'Attack on Titan'. The ponies, with their magic, could initially be seen as a threat by the humans in the walls. But as they learn about the titans, they use their unique abilities to help. For example, Twilight Sparkle could use her magic to study the titans' weaknesses, while Rainbow Dash's speed could be used for scouting and evading titans.
Ben and Twilight Sparkle would be really interesting. Ben has his street - smart and action - oriented nature, while Twilight is all about knowledge and magic. Their interactions could be really fun, like Ben showing Twilight some of his alien tech and Twilight trying to understand it with her magical knowledge.
I think Naruto and Levi would be really interesting. Naruto's positive and determined attitude would contrast with Levi's more stoic and no - nonsense personality. They could learn a great deal from each other. Naruto could teach Levi about the power of friendship and believing in oneself, while Levi could show Naruto some of his amazing combat skills and discipline.
It has to be Naruto himself. His never - give - up attitude and his ability to make friends easily would make him a great addition to the world of Attack on Titan. He could inspire the characters in that world, like Eren, to keep fighting even in the face of despair. Also, his unique powers would be really cool to see against the Titans.
Levi Ackerman would be an interesting choice. His exceptional combat skills and no - nonsense attitude would make him stand out in the Destiny universe. He could quickly adapt to the Guardians' fighting styles and weapons. His precision with the blades could be compared to the Guardians' accuracy with their guns. And his loyalty to his comrades would be an asset when dealing with the various factions in Destiny. He would be intrigued by the different races and the concept of the Light, and would likely use his skills to protect those in need in the new world.
Ichigo and Eren would be a very interesting pair. Ichigo has his powerful Soul Reaper and Hollow powers, and Eren has the power of the Titans. They could learn from each other, like Ichigo teaching Eren about controlling his inner power better, and Eren showing Ichigo the determination of the people in the Attack on Titan world.
It's hard to say for sure, but Thor could be a very powerful character. His hammer gives him the ability to fly and strike with great force. Against the Titans, he could use his lightning powers to fry them. Also, his god - like strength and durability would make him a tough opponent for the Titans.
A theme of hope could also be present. In Attack on Titan, the situation is often very bleak, but in the world of My Little Pony, hope and friendship are strong forces. So, a fanfiction could explore how the positive aspects of My Little Pony's world could bring new hope to the characters in Attack on Titan, or how the determination of the Attack on Titan characters could inspire the ponies in a time of crisis.
It's hard to say. Thor has his godly powers and his hammer Mjolnir which gives him great strength. But in the 'Attack on Titan' world, Eren's Titan form is also extremely powerful. However, if we consider all - around power, Iron Man with his advanced technology and ability to constantly upgrade his suit might be the most powerful. He could analyze the Titans' weaknesses and come up with strategies to take them down.
One interesting interaction could be between Optimus Prime and Erwin Smith. Optimus, with his strong sense of leadership and justice, would likely respect Erwin's strategic mind and his willingness to sacrifice for the greater good. They could exchange ideas on leading their respective groups in the face of great danger. Another would be between Bumblebee and Eren. Bumblebee's friendly and curious nature could contrast with Eren's often - brooding and determined self. Eren could be amazed by Bumblebee's technology and abilities, while Bumblebee could be intrigued by Eren's Titan - shifting power.