Simply battle with them and they will level up and become stronger. Or, every now and then you will find carbos, calcium, iron, ect. these can boost certain stats of you pokemon.
Just look for a Pokemon with flame body ability and then your eggs will hatch.
Use an AR.
You can't.
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.
All starters, including Bulbasaur, can't be caught in Pokemon LeafGreen.
Yes you can trade leafgreen version Pokemon to another leafgreen version.
all you have to do is battle people
you cant... yet
No. Poke'mon Master
defeat it
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?
you battle with it or put exp. share and battle with a different Pokemon
A ditto with (any Pokemon you put in the day care accept for legendaries)
shoot him with a railgun
Just look for a Pokemon with flame body ability and then your eggs will hatch.
you should go to gamestop
On Pokemon Pearl's title screen, if the Pokemon LeafGreen game is in the GBA slot, click on "Transfer From LeafGreen" and you can choose six Pokemon from LeafGreen to transfer to Pearl, but be careful-you can't trade them back.