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.
many have tried but he is in another region after he released zekrom/rehiram hes gone
You don't.
Zekrom is exclusive to Pokemon White, you will need to trade it.
No,you can't. maybe in an event.
no one knows exactly where but their was a report that he is at a far away place. at the end and your in your room come down stairs and you will find out.
u dont find him he was arrested after battling him in the league
You have to find the seven sages well 6 as looker arrests one when u catch reshirim or zekrom
After finding the 6 Sages(Ghetsis and N must be in Sinnoh), you go onto your adventure,completeing the PokeDex.
Looker goes away after you find the Seven Sages.
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
He dissapears and is never seen again but I heard there will be an event soon that you get to see him and catch reshiram in white and zekrom in black. :) I'm excited!
you go to nuvema town to your house and talk to looker