Dark things can change a Pony

I don't know how the age system works in My Little Pony, so it will work like the human age system, besides they anthro human bodies in this story, but they don't show any traits of pony.

But I'll refer them as

Colt(s): For males when they are children or a teens

Stallion(s): For males when they are adults

Filly(s): For females when they children

Mare(s): For females when they are teens or adults

And I refer more than one person: pony, everypony, somepony, ect.

Here is what they look with anthro bodies

Earth Ponies: They look like regular humans, but like in the show, they have super strength and great stamina.

Unicorns: They look like humans with a horn sticking out of their foreheads.

Pegasus: They look like humans with wings.

Their cutie marks are shown on each side of their arm. Even though they look like humans, they don't meat, they eat normal like in the show, they eat grass, flowers, fruits, and sweets.

And like humans, they wear clothes, just so you know. You readers can imagine what clothes they wear.

Rumble has the best life he ever has. He's one of the best athlete in the school of Cheerilee's, he caught the eyes of many females because of that, but that actually annoyed him. Many fillies would ask him if they want to hang out, every Valentines ( Hearts and Hooves Day ) he would come home with a backpack full of cards and chocolates, he was annoyed with the cards, but not the chocolate. Other than that, he has a nice life, he has some great friends, two great foal sitters, one great older brother, and he had two great parents.

That's right, he had parents, the two died when he was young. They died at work when the cloud machine maker went haywire and exploded. Many survived, only those two didn't make it. Rumble got the bad news from Thunderlane when he came back home from school, he took it really hard. He isolated himself from his friends, his foal sitters, and everyone else in Ponyville including his brother.

The only bright side to this is that Rumble became more athletic because he started doing martial arts and do a lot of exercise to clear his head. Fillies became more interested him, but he became rude to them to make them leave him alone and he didn't care if he hurt their feelings.

Seeing his young brother not taking it so well, Thunderlane decided to move from Ponyville to Las Pegasus. Cloudchaser and Flitter decided to also move with them to help with the Rumble situation.

But it didn't work, when they move to Trottingham, Rumble didn't change back to his old self.

At the age of 16, Rumble move out from his brother's and move to his own. He got the money to move out because he became an assistant of a martial arts master to help teach other martial artists. Thanks to all the training and fighting, he finally gained a cutie mark, a black tornado with lightning striking into it, it means he has powerful fast speed and strength.

His routine now ever since he move out would be waking up really early before morning, go exercise, go to school, go to work, come back home and the cycle will restart itself.

But that changed when he got a letter from Ponyville after coming back home.

Dear Rumble,

Your invited to come to my wedding in Sweet Apple Acres, which will be in a about two months

I'm getting married to Big Macintosh Apple.

I hope you come, I missed you and my other students who used to go to my school.

Speaking of which, I'm having a little get together with them, I really hope you come because everyone else misses you.

From your favorite teacher,

Cheerilee Smiles, soon to be Cheerilee Apple.

Rumble look at the letter after he was done reading, he's choosing to go or not. He want to see his old teacher in Ponyville, she was the only one he act around his old self because she is like a second mother to Rumble. But he seriously didn't want to go back to Ponyville, bad memories of the incident. But he also didn't want to hurt his favorite teacher's feelings.

He put the letter down, he took out a briefcase from under his bed and started packing some clothes and other stuff needs. He's going to the wedding.