No,you can't. maybe in an event.
He goes back to sinnoh
When you finish finding the seven sages looker comes and tells you about n ps he does not give you the liberty pass
The is nothing else to really do. The seven sages were basically the final mission.
you go to nuvema town to your house and talk to looker
An event
route 18
Just do whatever you want! :)
look for n
one is in the relic castle on route 18
That is not really a question to ask but if you asked who is ghetsis he is one of the seven sages in Pokemon black and white.
You should have Zekrom already by that point. If you're playing Pokemon Black, then remember that Zekrom is N's pokemon, so you won't be able to get it. You need to trade it from Pokemon White.
i have been on several official cites looking for this including Pokemon wiki and serebii they list how to find the seven sages but not ghetesis so i think you cant sorry