Han Solo would be a great choice. Han is a smuggler, so if he ended up on Earth, he might try to find ways to make a profit. He could get involved in some illegal car races or underground deals. His charm and quick - wittedness would help him navigate through Earth's various social situations. And of course, his blaster would be a very unique weapon on Earth, causing quite a stir wherever he goes.
Princess Leia would also be fascinating. She's a strong - willed leader. If she were on Earth, she might get involved in political or social causes. She could be an inspiration for women's rights movements. Her diplomatic skills could also be put to use in international relations. And her iconic hair buns would surely make her stand out in any crowd on Earth.
Yoda would be really interesting. Imagine Yoda on Earth, his small stature and strange way of speaking would be quite a sight. He could end up in a place like a martial arts dojo. The martial artists there would be intrigued by his moves, which are similar to their own but also very different. Yoda could start teaching them some of his Jedi wisdom and combat techniques, all while trying to adapt to Earth's gravity and environment.
For me, Yoda and Cortana would be an interesting pairing. Yoda is a wise and ancient Jedi Master, full of knowledge about the Force and life in general. Cortana is an AI with vast knowledge of technology and military strategies. They could have some really deep and thought - provoking conversations. Yoda might be able to teach Cortana about the spiritual side of things, and Cortana could share her technological insights with Yoda.
Definitely Spock and Yoda. Spock's logical Vulcan mind and Yoda's Jedi wisdom would make for some really deep and thought - provoking conversations. They could learn a great deal from each other about different ways of thinking and approaching the universe.
One interesting combination could be Jack O'Neill and Han Solo. Jack's military experience and dry humor combined with Han's smuggler charm and piloting skills would make for some great adventures. Another would be Daniel Jackson and Obi - Wan Kenobi. They could have deep discussions about different cultures and the Force while also teaming up to solve mysteries.
I think Gatomon would be a great character to feature. As a Digimon, she has a strong and independent personality. If she were to meet a Pokemon like Eevee, there could be a lot of potential for character development. Eevee's ability to evolve into different forms could intrigue Gatomon, and they could learn from each other's adaptability and survival skills in their respective worlds.
Hermione and Leia would be a great combination. Hermione is brilliant and resourceful, and Leia is a strong and fearless leader. Hermione could help Leia with her knowledge of spells and potions, while Leia could show Hermione how to lead a rebellion. They could both inspire each other and be a force to be reckoned with in the fanfiction.
Definitely Pikachu from Pokemon. It's so cute and full of energy. In the MLP world, it could befriend Fluttershy because she's good with small and cute animals. Another interesting character would be Charizard. Its big and powerful presence would be quite a contrast to the ponies. And from MLP, Rainbow Dash would be a great character to include as she's adventurous and could have some really fun interactions with the Pokemon.
One possible plot could be that a group of Star Wars characters accidentally travel through a wormhole and end up on Earth. They might be shocked by the different technology and cultures here. For example, Darth Vader could land in a big city like New York. People would be terrified at first, but then some might try to understand him and his powers. Maybe a young scientist tries to figure out how his lightsaber works, leading to a series of comical and also tense situations as the Star Wars characters try to find a way back to their own galaxy while also dealing with the strange new world of Earth.
Luke Skywalker is without a doubt a popular character in this type of fanfiction. He represents the classic hero, and his journey from a farm boy to a Jedi Knight can be paralleled with many Earth - based hero stories. Chewbacca also has his fans. His loyalty and brute strength can add a unique element to stories set on Earth.
Darth Vader also has a strong claim. His mastery of the Force, along with his combat skills and his leadership in the Galactic Empire, would make him a formidable opponent. If he were to somehow get his hands on some Marvel - style technology or powers, he could become even more powerful. For example, if he were to combine his lightsaber skills with Wolverine's healing factor, he would be nearly unbeatable.
Anakin Skywalker as a Pokémon trainer would be really cool. Imagine him with his own team of Pokémon, and how his journey to the dark side might affect them. Also, Yoda could be an interesting character. He might have a small, but very wise Pokémon by his side, like a Bulbasaur that he has trained to be in harmony with the Force.