Following the Rainbow Dash and Twilight Sparkle release last year, Symbiote Studios has expanded into even more ponies! Applejack and Pinkie Pie are both plushified now, and listed over on their website. They also have alicorn Twilight if you want her with her wings.
You can find them all over on the website, or over here. Each plushie clocks in at 12 inches in height. They also have cutie mark pins if you are interested in those!
Thanks to Las Noticias MLP for the heads up!
