Hey there! :D
I'm not familiar with My Little Pony or it's style of art, so I might not be the best person to comment on this particular thread.. but your eye for color and evoking an emotion is too good for this thread to not get any attention!
Initially, I thought your work was very simplistic in its design. But upon closer inspection, specifically this piece, I found that your line work is nearly immaculate. The width of every line is consistent and changes just slightly to compliment the character and show depth. And I love how you seldom use black in outlining or in your characters in general, with the exception of the eyes and this one. It makes your work so light and fluffy and easy on the eyes.
I, personally, would love to see what you can do when you branch out a little more. The animals are cute, but I'd love to see some of your other work if you have any! n_n;