My team is: level 58 Giratina with Fly, dragon pulse, dragon claw and shadow force. Level 47 Ho-oh with extrasensory, sunny day fire blast and sacred fire. Level 50 Typhlosion with flamethrower, cut, strength and sunny day. Level 46 charizard with scratch, fire fang, flamethrower and dragon rage. Level 31 red gyarados with hidden power, dragon rage, sleep talk and twister. Level 27 tentacruel with barrier surf waterfall and whirlpool. I couldn't figure out how to put that in the question description. Sorry.
no beat the elite four first
You never go to Hoen.
Yes you do
Yes
Yes they do I can tell you from experience.
nothing
go to the kanto region
They are still in the Pokemon league
When you beat the elite four.
no but when you beat red you will beat the game fully (without catching every pokemon) and the elite four will become twice as good as before
beat the elite four.
Yes. To unlock it, you must first beat the Elite Four.