It is part of the story. So don't worry about having to go to an event
The mystery Dungeon 2 wi-fi event for MewTwo and Celebi are now through September 1st. This was on the Pokemon website I looked at about an hour ago.
its an expired event
no their wont
you need wifi or go to an upcoming Pokemon event.
--Arceusoxys awnserd ©---Does Shaymin Exist in there?
That's the last event. After that, get all of the Pokemon to join your rescue team.
it mostly depends on if you traded,or did the mystery event. If you have done the mystery event you can get deoxes and other legeandarys. but you can catch mewtwo plain. if you traded, it depends on what game. im pretty sure a level 100 mewtwo can take on a level 100 starter.
At Sky Stairs Summit through a nintendo event
by doing the special event, today's oh my gosh
Groudon, Kyogre, Rayquaza, Mew, Articuno, Heatran, and Giratina.
the only way is right now there is a event if you have the japan game to go to mystery gift andget it OR use poketransfer
Palkia will appear and start a new chain of event AFTER beating the story mode.