One possible plot is that the powerful human is a reincarnation of an ancient and powerful being in Equestria's history. The ponies at first don't believe it, but as the human starts to show signs of great power, like being able to communicate with long - forgotten spirits or having the power to heal the land that has been damaged by dark magic. The human then has to figure out their true identity and purpose in Equestria while also facing challenges from those who fear their power and those who want to use it for their own evil ends.
The powerful human would be the central character. They might be an older, wiser human who has been sent to Equestria for a specific mission. Then there could be Pinkie Pie, who would befriend the human right away and introduce them to the joys and quirks of Equestria. And there could also be a villain, like Discord, who sees the powerful human as a new plaything or a threat to his chaos - filled world and tries to either befriend or destroy the human.
Well, perhaps the human-turned-mew would have to adapt to the magical world of Equestria. They might discover new powers as a mew and use them to help the ponies. For example, they could use their mew powers to heal sick animals or protect the land from dark magic.
One possibility could be a character who has a deep understanding of magic and uses it to help the ponies in Equestria. This person might have studied magic from a different realm and brings unique spells and techniques to solve problems in Equestria.
Well, it could be about a Saiyan gamer who gets transported to Equestria. He might use his gaming skills to adapt to the new world. Maybe he starts by learning the magic system in Equestria like it's a new game mechanic.
Well, in fanfiction, when an MLP meets a human in Equestria, there could be a lot of confusion at first. The MLP might be curious about this strange new creature with no hooves or a mane. They could start by trying to communicate, perhaps with some funny misunderstandings. For example, the human might not understand the MLP's body language or the significance of their cutie marks right away. And the MLP could be puzzled by the human's clothing and tools. Eventually, they might form an unlikely friendship and embark on adventures together, exploring the magical world of Equestria from a new perspective.
It could be about a new magic that allows the characters to literally share tongues, like a form of communication or power transfer. Maybe it's a strange and mysterious power that they have to figure out how to control.
Perhaps it could be a scientist who uses his knowledge to improve the lives of the ponies in Equestria. He could introduce new ways of farming or energy sources.
One idea could be a human arriving in Equestria and Pinkie Pie being the first to befriend them. She shows the human all the fun and unique things in Equestria like the Sugarcube Corner treats. Another could be the human and Pinkie Pie working together to plan a huge celebration for all of Equestria, bringing in elements from the human world to make it extra special.
One common theme is self - discovery. The human character often has to figure out who they are in the strange world of Equestria. For example, they might realize new strengths or weaknesses.
One common theme is friendship. Just like in the original Equestria stories, the male human often forms strong bonds with the ponies he meets. Another theme is adaptation, as he has to get used to the very different world of Equestria.