One day I was playing Pokemon Black 2 and a friend of mine gave me his Jirachi. tranfered it over to X and really glad it transfered, so now I know my Jirachi is legit.) I decided I was going to check my Jirachi's IV's in Kiolude City, and he said:
I see... I see... This Pokemon has outstanding potential overall. That's how I judge it, anyway. Incidentally, I would say that its greatest potential lies in its HP. But its Attack stat is good, too. Hmm. And its Defense stat is good, too. Although its Sp. Atk stat is equally good. Its Sp. Def stat seems just as good, though. And, well, its Speed stat is good, too. Stats like those... They simply can't be beat! That's how I judge it.
How rare is it to have a perfect 6IV legendary, event or not?