Bingopugs
Disclaimer: the story is just a work of fiction for entertainment. The main character may turn the ponies fascist, but they're not Nazis. I'm repeating myself. They are not Nazis. Now, enjoy the rest of this description.
The planet Equus was divided for as long as it was. Now there was no global war. But the entity that watches this planet was bored. It's favorite Discord is now dead. Thanks for the elements of harmony that is. But he looked at Earth and a twisted idea came to his head. What would happen if he put humans into this planet? He picked 4 unlucky humans. 2 males and 2 females perfect balance, right? None of that matters. The only thing that matters is the chaos these 4 will bring. But he's missing the final fourth one. Luckily, there was a boy that he looked and he was perfect for the ponies.
Disclaimer: The story real dive into really heavy topics. Things like mind control Abuse, manipulation, statutory rape extreme graphic violence and profanity.
P.S. The time line of the MLP lord will be very different. The pony will have an anthropomorphic form. This is so easier for them to use guns. The same goes to other species.