I've been asked recently about this so I thought I would make a topic about the details of the event.
The Liberty Pass is an item you use to get to Liberty Island where you'll find Victini, who will be level 15. You will be able to download the event over wifi starting the day the game is out.
March 4th - April 22nd in Europe
March 6th - April 10th in America
However you will not be able to get Victini till you progress in the game to Castelia City. Once there you will be able to take one of the ships in the harbor to Liberty Island.
So whos downloading the event? When or if you get Victini will you keep it as a part of your party or just keep it in your PC?
I plan on having it as a member of my party in one of my games. Since it'll be at a low level when I catch it it'll make it fun to train. After all most legendary Pokemon are caught at level 50 and up.
"Don't walk behind me; I may not lead. Don't walk in front of me; I may not follow. Just walk beside me and be my friend."