The badges are just,there for you to be able to use HMS outside of battle and for high levels of Pokemon to listen to you depending on the badge...
its actually the 8th gym so you need 7 badges and then it will unlock
Yes you can trade leafgreen version Pokemon to another leafgreen version.
Use a moon stone on it.
i think a Oddish or Vileplume could use it
you go to the eliet 4 and finesh the game.
Yes, if you get the Gym Badges.
go through victory road with all gym badges
If you get all eight badges then you can verse the elite four. They are really good and if you beat them you become the champion.
To open the Elite Four, you have to get all the Gym badges.
its actually the 8th gym so you need 7 badges and then it will unlock
Defeat team rocket in the game corner, Pokemon tower and silph co then receive 7 badges.
Train your starter Pokemon then use it.
You can't get deoxys (unless you have the aurora ticket) in leafgreen but if you could yes you would need all 8 badges and also you would need the national dex and you would have had to deliver the ruby and sapphire to celio.
At least 2 badges are needed to trade from leafgreen to firered.
The Pokemon League is located West of Viridian City. You'll need all Badges to get through.
After getting all the badges the 8th gym will open You beat givoanniORWalk Through Walls!!!!!!!!!!
you have 2 have @ least 5 badges than you go 2 pallet town and you sail on the water