after you beat all 16 gym leaders,he is at the top of Mount Silver, so talk to him to fight
Fight red
fight red
nothing, you can fight him again.
You fight him when you beat all 16 gym leaders and the Indigo League. Go to Pallet Town and talk to Prof. Oak and he will give you permission to go to Mt. Silver. On the peak of Mt. Silver is Red and that is where you fight him!
I am sure ( kind of) that you do not if you fight and beat Red first he is at the top of Mt.Silver
Beat the elite four again then go back to the top of mt. Silver
you can fight him as many times as you want
yes beat the indigo plateu again
yes you can fight red on top of mt silver just watch out cuz his pikachu is LVL 88 THIS TIME!!!
beat the elite 4 again then go back to Mt Silver
just fight
you can only get red orb(groudon) in soul silver