I think it could be Naruto and Pinkie Pie. Pinkie Pie is very outgoing and loves to meet new friends. When Naruto arrives in the My Little Pony world, Pinkie Pie would sense the new presence and be the first to bounce over and introduce herself. She'd be full of questions and might even throw a welcome party for Naruto right away.
Probably Naruto and Twilight Sparkle. Twilight is the intelligent and curious one in the My Little Pony world, always eager to learn new things. Naruto, with his unique ninja abilities, would be something completely new for her. She would likely approach Naruto first to find out more about him.
It might be Naruto and Rainbow Dash. Rainbow Dash is bold and confident. She would be intrigued by Naruto's sudden appearance in their world. Also, she's always looking for new challenges and Naruto's ninja skills would seem like a great new thing to explore. So, she would likely fly over to Naruto as soon as she spots him.
Probably Spongebob and Twilight Sparkle. Spongebob is always curious and eager to explore new things, and Twilight is the most studious and open - minded of the ponies. So when Spongebob arrives in Equestria, Twilight would be the one most likely to approach him first, wanting to learn about this strange new creature. And Spongebob would be happy to talk to her because she seems friendly and intelligent.
I think Pikachu and Fluttershy would be likely to interact first. Pikachu is curious and friendly, and Fluttershy is gentle and kind - hearted. Their personalities would make them approach each other easily.
Probably Goku and Twilight Sparkle. Twilight is the smart and curious one. She would be the first to approach Goku out of scientific interest, wanting to understand where he came from and what his powers are all about.
Well, it could be Twilight Sparkle and Spongebob. Twilight is the intelligent and studious one in My Little Pony. She would be intrigued by Spongebob, who is clearly a very different kind of creature from Equestria. Spongebob, on the other hand, would be in awe of Twilight's magic and knowledge. Their first meeting might happen when Spongebob is exploring the library in Ponyville that Twilight often frequents. She would start asking him questions about where he came from and what his world is like.
Happy from Fairy Tail and Pinkie Pie from My Little Pony. Happy is a fun - loving and friendly cat - like creature, and Pinkie Pie is the life of the party. They would likely find each other immediately and start having a great time together, sharing jokes and treats. Pinkie Pie might even teach Happy some of her party - planning skills.
Probably Naruto and Robin. Robin is the leader - type in Young Justice, always thinking and strategizing. When Naruto shows up, Robin would be the one to approach him first, trying to figure out who he is and what his intentions are. Naruto, being friendly and curious, would be open to the interaction.
The soldier might be a bit rough around the edges at first. He could be used to a more serious and tough environment. But the ponies, with their friendly and kind nature, would probably try to make him feel welcome. For example, Twilight Sparkle might offer to show him the library and share knowledge, while Pinkie Pie would throw a party to cheer him up.
The interaction could be really complex. The ponies, being magical creatures, could try to use their spells to understand Godzilla's language or intentions. Godzilla, who is used to a world of destruction and chaos, might be confused by the colorful and peaceful world of Equestria. There could be a lot of misunderstandings at first. For example, when Godzilla roars, the ponies might think he's angry, but he could just be trying to communicate. And as they slowly start to understand each other, they could form an unlikely alliance. Maybe the ponies help Godzilla find his way home, and in return, Godzilla protects them from any future threats that might come from his world.
Applejack and the Heavy might be the first to interact. Applejack is a hard - working and practical character. The Heavy is a no - nonsense fighter. Applejack might see the Heavy and be curious about his large size and strange weapon. The Heavy, on the other hand, might be interested in Applejack's farming skills and the fresh apples she might be carrying. Their down - to - earth personalities could lead to an initial interaction.
Obviously, Nate 10 would be one of the main characters. And from My Little Pony, Twilight Sparkle is very likely to be a main character as she is often at the center of many adventures in the pony world.