When she mentioned famous J-Pop bands and flashed that picture of Tokio Hotel, I knew I was in love.
This is absolutely brilliant. Her character is subtle and believable, yet utterly brutal and unrelenting. The voice acting is great, and while she's taken great pains to make it PAINFULLY OBVIOUS that she's using stock art from the Pony Creator (that goddamn rearing pony pose!!! She almost trolled the piss out of me with that one!!!), the animation is very expressive and perfectly synced to the dialogue.
This *is* probably one of those things that requires extensive knowledge to be funny, and, having spent the last few days scouring the 'net for more Kimi Sparkle, it seems like many people who *should* know better have nonetheless completely missed the joke. But if you get it, it's glorious.
You're not going to think that this so-called 'troll' is so funny when she ends up forcing the people at Hasbro to actually make Rarity go away forever.