You can trade between firered, another leafgreen, ruby, sapphire and emerald also Pokemon colosseum and Pokemon xd gale of darkness.
there are 151 between leafgreen and fire red
There is only one difference.That difference is that they have it in European.
It doesn't matter. The only difference between the two is that certain Pokemon battles with the same person will use different Pokemon.
No you cannot trade from Game Boy Color And Game boy Advance.
Yes, you can battle between different versions of Pokemon.
No.
You can only mix records between Pokemon ruby, sapphire and emerald not leafgreen.
..you cant but if your game version is leafgreen,, you need to have a firered and link it with leafgreen using a link cable and trade the Pokemon in a Pokemon center
If you trade Pokemon between leafgreen and ruby ruby will have your leafgreen Pokemon and leafgreen will have the ruby Pokemon both in the party they will not be sent to the PC unless you personally walk to the PC and do so.
I have to say it is probably a tie between Moltres and Charizard with me.
yes.