Mild fan of the show, I'll watch it when an episode is released but I don't go to conventions or buy MLP merchandise. I always have had an interest in story writing though so I'm here to try
When Rainbow Dash tells the story of her cousin who stopped playing with her after recieving a Stormcloud Cutie-Mark, the CMC go to Cloudsdale to investigate.
Spike befriends a Rot Wolf named Dark Bark who is foreign to Equestria. When Twilight researches such wolves, she doubts friendship with such a creature is possible.