nope, he's gone FOREVER
No.
no.
As far as I know of - you don't ever battle her.
yOU CAN NEVER EVER GET IT IN POKEMON BLACK(ONLY IF YOU ARE DREAMING)
I personally think that the best Pokemon in Pokemon black is Reshiram because he is the legendary!
No.
arceus
not really
no
No, you don't battle Steven in HG/SS.
As far as I know, no. I beat the game a few weeks ago, and after you defeat Ghetsis at N's castle, that is the last time you see him.
no