My God...I haven't commented on your awesome work for months! How rude of me...Anyway, this one caught my interest and I certainly had to write about how wonderful it is~
I absolutely love the contrast of moods going against each other, and by none other than Pinkie Pie and King Sombra! I admit, in the show, I was disappointed for the lack of Sombra's dialogue, then I started to appreciate him more because of your artwork (not to mention, his awesome design). And, because of that, I looked more into him and studied him, and realized just how awesome he is and the intention of the writers! That has nothing to do with this certain artwork currently...I think I'm just rambling again, I apologize.
Anyway! Back to the actual point of the artwork, I love the designs you did on Sombra's side. Crackling designs always make shiver and admire, something you did well! I am loving Sombra's expression, you can tell he is absolutely furious while hate is directed on one certain pony. This brings to my other point, Pinkie Pie. You did wonderful on her expression, it captures her essence of her personality, and the bubble affect is the right touch. I love how the bright blue contrasts with Sombra's dark background color, symbolizing the moods most definitely! Such hate and silliness is an odd combination, but worth admiring!
Not to mention, such contrast results in crack pairings. Seriously, ever since I gazed upon this picture, I kept thinking of the cracked pairing "Pinkie Pie/Sombra", because why not? XD! Of course, I don't think anyone would be willing to try it, since I (and others) think Fluttershy/Sombra is cute as well as Pinkie Pie/Discord. Of course, don't get me wrong, I know your cool art piece is in no way indicating romance between Pinkie Pie and Sombra, I just thought it be fun to toss the idea in the air. XP
Either way, love the background (especially how it fades with Pinkie Pie's background), love the characters, love the artwork and design. As always, you did awesome! And, as always, I rambled more than I needed to.
Great job! Kudos! Peace out! XD