Yeah well...I had this idea in my head for a while, and I finished this...well a couple of days ago, but I wasn´t sure if I should upload it or not. The quality of the clips is not the best and well....but I thought I should. I mean, I´m not only a huge MLP Fan, I also love Sherlock so much and this song....well it kind of fits. xD If I had to choose which character is who (and to explain why the clips are put together like that) I´d say:

Sherlock---Twilight
John---Rainbow Dash
Lestrade---Applejack
Mrs Hudson---Pinkie Pie
Mycroft---Rarity
Molly (though not in this video)---Fluttershy