I am pretty sure you can pre-order all the way up through the night before release, as in 11:59pm Pacific time of June 19.

Now, as for getting the codes, that depends on how you pre-order. I believe that places like Best Buy and Gamestop may not have them that late and Amazon might be out by that time too. I am not sure about Steam. As for the SE, you will be able to all the way up through till about 1 minute before. Just so you know, the code that you use to redeem the pre-order code for the mog station have expired in the past. So, redeem the mog station code before that happens or else you will lose the bonus items.