A man wakes up to find he's inhabiting the body of a cartoon horse who wasn't exactly Mister Popular, judging from how shocked the locals are when he says things like 'please' and 'thank you'.
A rogue portal dumped Caleb into an Equestrian desert and left him stranded in an unfamiliar universe. He has to start his life anew but a sympathetic earth pony mare offers to help him learn the ways of his new world.
A young pegasus, not seeing any hope left in life, attempts to throw his life away. One pony's trash is another pony's treasure. And Luna likes digging through the trash.
My unicorn parents called me a worthless mud pony. They pushed me every day to overcome my lowly status. When I woke up one morning with my cutie mark, I thought they would love me. I couldn't have been farther from the truth.