How do you get the legendary Pokemon arcus?

how can i get Pokemon arcus plees help me

--------------------

The event hasn't come out yet, but there is probably going to be a movie about him in a year or two, and with that movie that might be when the event starts. other than that, if your one of the impatient types, you could use a GameShark code or some other form of code hacking, of course this is cheating, as you are altering game data to get the most powerful wild Pokemon there is