Unfortunately, nothing happens.
Gone forever =(
You don't.
catch "em all
Zekrom is exclusive to Pokemon White, you will need to trade it.
yes you have to find all of the seven to catch rayquaza in pokemon white
Yo mammas house
At black city but it's hidden somewhere therE
You cannot find Ghestis. He disappeared after you battled him and N at the Pokemon League.
Well you could go to white forest on white and find ghetsis on black go to front of black city
Yes at the very far side of it
you have to find all the seven sages ,beat Cynthia ,alder and the elite four.
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