You need all 8 Gym Badges in the region you're in to face the Elite Four.
Did you deliver the ruby and sapphire yet to celio if not you need to before you can face the elite four.
you battle the elite four in the indigo plateau
To face the Elite 4 a second time, you need to have: Met with Lorelei on Island 4. Completed the Ruby/Sapphire plot (involving Rockets.) Lorelei will return to the Elite 4 and you can then face them again.
You go to this one room where you face your enemy who also has beaten the elite four then you face him and if you win you become Pokemon champion
if you want to face RED you have to beat the elite four. when you beat the elite four and go to the top of mt silver you can face RED.
Face Red
In Ruby and Sapphire yes you need to beat the Elite Four first, but in Emerald you can catch Raquazza before or after you beat the Elite Four.
An elite four is four elite Pokemon trainers who, after you get all eight badges, should be waiting to face you. These are four of the strongest trainers you will battle, unless there is a fifth person (rival) who you will have to face one after another with no Pokemon centers or poke marts.
No, you do not have to face the Elite 4 twice in Pokémon Black but in the event of wanting to face Alder, the Pokémon League Champion then you will need to face them twice since you will not be able to battle Alder the first time through.
Face the elite four.
the elite four is in ever grande city you will need waterfall to get there and surf.
Cynthia IS the Sinnoh region champion, so to face her you will need to collect all the badges and defeat the Elite Four.