Artist’s description from DA:

Scrawny and soft spoken no more. When his father, Bulk Biceps, was drafted Featherweight immediately hit puberty and resembled his daddy more and more everyday. His wings aren’t growing anymore but with or without working out his muscles are making him look pretty beefy. He never really pumped iron like his dad did so he’s not quite as buff but he still packs a punch. He also flies a lot more and is/ will continue to be significantly better at flying than his father ever will be. He doesn’t have buck teeth anymore but he does have a noticeable gap. Featherweight found a good outlet in Applebloom’s self defense classes and partnered up with her in a way. He also acted as a volunteer body guard; if some pony didn’t feel safe walking home or in their store during the day, Featherweight would stand guard outside to ward off any trouble makers. He became very close friends with Rumble, Truffle Shuffle, and Shady Daze.