Artist’s description:
 
“Pinkie! Pronk pony is bounciest pony.  
I tried to make her shorter and stockier, with a bit of clydesdale fluff around the hooves. I also tried to make her noticeably chubbier than the previous two. Same face same body syndrome is something that I can get over if I’m thinking about it, but I haven’t been thinking about it super hard up to this point. Twilight and Rainbow didn’t turn out too bad, but I blame that more on Twilight’s mid-series species swap than anything else. Hard to look identical to someone when you’re like three times taller.
 
Going forward, I’m going to try fixing that. Aj will be BIG, and fairly heavy. I’m going for more of an elegant look with both Fluttershy and Rarity, but Fluttershy will be tall and skinny, where as Rarity will be a bit shorter and thicker. Like, she tries her best to diet and keep a figure, but she ice cream binges a bit too often and some of it hangs around. “