This is a drawing of an AU of mine called Brothers in Arms. I plan to actually write out the stories/story for each of them and explain their backstory later. The only solid thing right now about them that I can tell is that they are the brothers of the Mane 6; their supposed shadows (bad lads).
I tried to make their designs look somewhat like they could be related to the Mane 6 so I hope I did a good job.

Names:

Purple-Gray Coat: Moonlight Glow (Twilight’s younger brother)
Gray Coat: Anthracite Coal Pie (Pinkie Pie’s brother [undetermined age])
Cream Coat: Sugar Shortcake (Rarity’s younger brother, older than Sweetie Belle)
Dark Blue Coat: Star Storm (Rainbow Dash’s younger brother)
Orange Coat: Autumn Glory (Apple Jack’s brother [undetermined age, younger than Big Mac])
Pink Coat: Lightwind (Fluttershy’s younger brother)

I still am working on adopts so don’t worry ^w

Original Designs By: Me