you have to beat flannery.when you walk out of the gym,may appears and gives you sandgoggles.put them on and you cango into the desert.
It's in the sealed chamber which is in route 134.
Just read it, al the icons are UNOWN so you can look wat kind of icon it is
I never found anything that would help figure the braille on the game, i used a dictionary, which has braille in it and wrote the translation on paper... hope this helps!
You can't get a braille translator in the game, you'll have to google and look on wikianswers to help you decode the braille and get the regis.