Poor Appleponi. I think it's probably the difficulty of molding her hat, but she always seems to come last in the pony merchandise lines. A Brazilian company called Multikids is pumping out pony shaped backpacks over on a site called RIHAPPY. They have a few odd shapes here and there, but I don't think I've seen a perfect pony shaped backpack ever over the years.
Head on down below to check them all out!