GE2's 1.4 patch is out in Japan finally, which includes the multiplayer functions and I'm guessing more costumes and quests. I searched around for a while, but all the downloads are for the last 1.3 patch.
Online multiplayer is Vita-exclusive.
I don't know.
And about the thread's title "anybody know where to download it online?".
It's against the Terms of Service.
It's a patch, not a game. Not illegal to patch a game with an official patch.
If you don't download it yourself from PSN, well... it's copyrighted material that's illegal to share.