The Saddest Pony
BBBFF by mrs1989
Angelic Flutterboom chapter 2 page 02 by saturdaymorningproj
Derpy by Shedence
My Little Pony: The Saddest Landscape by TheCawOfCrows
Stop bullying me… by Dueswals
Twilight is crippled by porygon2z
because I’m only human by chocolate—bunny

If Dash wrote a song about her turtle. 

Crying like a baby by QueenCold
Fear the Darkness by PonyBytes