Spike had always wondered: just who were his real parents? To properly answer that, he needs someone sincere, someone sympathetic. What he gets is Discord.
During the Hearths Warming season, Princess Luna pays a friend a visit.
Based on the Equestria Girl's Holiday Special, Sunset really didn't get much of an apology for how she was treated, so how did this effect her?
...what? It's a school bake sale.
The whole fiasco with Anon-a-miss has made Sunset realize something.
Chrysalis plays with a red ball, things ensue.
A changeling seeking love encounters a pony who is an abusive father and "redeems" him.
The pressure of being a Princess is too much for young Flurry Heart. Running away from home seems a whole lot easier.
A Guard Pony realizes that he loves Queen Chrysalis, and seeks her to confess his love.
Or a vampire, for that matter!