I had the same error message, turns out the fix is to change your username from the pokemon website then it should let you on to the global linkWhen i go on the Global Link and log in, i keep getting this error message D:
Your member information is currently being processed. Please come back later.
If this message continues to appear after a few hours, please contact customer service.
I have my copy of Y, and just past the first gym! Loving this so far!
Cannot wait to find a Zorua/Zoroark and see if it has a Mega xD
No 5th Gen Pokemon's megas have been found yet.