braille is a way for blind people to read. you need to get the decoder to read it.
There is no "braille decoder", you have to manually decode it yourself.
Go to wikipedia, they have a braille dictionary.
You cannot find a Braille decoder sheet in any of the Pokemon games. Braille is very simply and easy to translate if you print off a Braille alphabet sheet for reference.
There are lots of braille messages to be found in Pokemon Emerald. To read them, you can simply look up the braille alphabet.
It is ⠁
It is not possible to get a Braille Dictionary in Pokemon Emerald. The Braille in-game is easy to decode as it translates into English. Decoding the Braille is as simple as using a pen and paper along with a printed Braille sheet for reference.
There is no braille in littleroot town on Pokémon Emerald.
Sadly, the game itself provides no translation sheet. However, if you take a look at one of the game's many game guides (either in print or online) there should be a decoder sheet on any source worth its salt.
get a dictionary with an abc alphabet of braille codes
go to http://en.wikipedia.org/wiki/Braille
it tells you how to unlock the regis