re: my trainer card and the "licensed Ditto farmer" bit: It's just a joke of sorts. When I would trade with my friends, the one thing I dealt in more than anything else is dittos to save them the hassle of finding ones of the natures they wanted, and because I tended to be just better/faster at getting a bunch of them. When I eventually get around to setting up a trade shop on here, the main thing I'll have available will be lots and lots of dittos. So putting the "ditto farmer" bit on my card seemed like a good way to note up front that getting massive amounts of dittos is kind of my thing.
There's no real officialness to it, it's just that saying "licensed ditto farmer" sounds better than "self-appointed ditto farmer" lol.