While Peter Griffin was out getting beer, he bought a device that can transport you into any show you wanted. As a joke Peter said My Little Pony. Now Peter and his family have to deal with life as ponies in Ponyville,Equestria. Cover image was found by searching up My Little Family Guy on deviantart.

Tristan had always loved running and sports. When cancer had threatened his life, he had to give up his dream of being an Olympic runner. Tristan got hit by a car while saving a boy who fell in the street. Tristan was hospitalized and had two days to live. His last wish was to watch his favorite episode of MLP:FIM. He fell asleep and awoke in a colorful land full of ponies.

The list of characters are more but 5 is all I could add.

Every pony Sweetie Belle has ever thought of as family has arrived to see her sing at her first concert. All except for one, the pony that had been there since the beginning has not yet appeared. Will her beloved sister appear or will Rarity let what happened ruin the chance of seeing Sweetie Belle's first concert.