If you mean the Ruby and Sapphire, the Ruby is in Mt Ember on One Island and the Sapphire is given to you by a Team Rocket Member after defeating him in the Rocket Warehouse on Five Island.
Same as Pokemon Leafgreen u will find it in mt ember just look every where
You cannot get to Fire Island on Pokemon LeafGreen. Fire Island is a setting exclusive to the second Pokemon movie, Pokemon the Movie 2000.
Anytime
you find them in mt.moon
cant
Yes you can trade leafgreen version Pokemon to another leafgreen version.
hm01 cut
a lot of Pokemon with very high levels :)
Not in Pokemon leafgreen only in Pokemon Firered never ever in Pokemon leafgreen And in Pokemon firered it is rare in power plant not available in Pokemon leafgreen?
keep walking or fly to the second closest city to you.
first go to cinnabar island second loo for the keys at the pokemon mansion
go back to them and chalange them again