Especially since, despite his age, he still hasn't developed a cutie mark.

There is a funny story (well, not really funny) about why he's blank, ya see most people in sites like this would quickly put a drawing cutiemark on their ponies, but i thought that would be very presumptous of me, having a drawing cutiemark implies TALENT.
So i decided he would be blank, but there was a running gag about having PS pony have bad things happening to him at all times, so for a time a bad luck themed one was an option.