I don't have any pictures.. But for a pony that is not customized, I just put them in a padded envelope. They arrive for me that way just fine, so i figure they ship for me just fine. If it is a lot of ponies that are not customized, they go in a box. If they move in the box, the box gets some stuffing.
If it is a customized pony.. It goes in a box and is padded carefully, firmly, and securely. If it has sculpting, the pony is put inside a plastic back, then swaddled in newspaper to cushion all sculpted bits, and the box is packed as securely as possible with packing peanuts or lots of wadded up old plastic grocery bags.
I saw a technique about suspension packing.. Basically you fill the box partway with packing material, then fill it the rest of the way up to the ponies head, leaving space between the head and the top of the box, and tape down all the bags inside. Ive never done it that way before though myself.