This commision from PartyLikeAnArtist is the ref for my earth pony oc Named Muddy Hooves! She is a mentally handicapped mare, about 20 years old. She is an orphan, currently resides in a foster home while she tries to get her high school degree. She does not have many friends, but the hoofball team protects her from bullies, and in exchange she goes to all their games and makes signs to show her support, though they are littered with mispellings and bad grammar, they appreciate her anyway.  
Muddy likes to be called Yellow because thats the color of her favorite comfort object, a yellow highlighter that has long since gone dry. After failing another test as a filly, her teacher made her wear the dunce cap, which Muddy misinterpreted as a reward and wore it proudly until a fellow classmate told her what the word “dunce” meant, after which she tried to cross out the word with her yellow highlighter, which only made the problem worse.