You just need a link cable.
trade
you can't get the black flute in leaf green but you can in Pokemon ruby, sapphire and emerald then trade it to leaf green.
no you cant
at mt. pyre
Connecting to Emerald as the same conditions as to Ruby and Sapphire. You must have completed the 7 Islands (Giving Celio the Ruby and Sapphire).
The sapphire and Ruby (you can find both in the game) allows you to trade with Pokemon ruby, sapphire and Emerald version give it to Celio and when you give both to him it will allow him to connect with the Hoenn region allowing you to trade with those versions
The ruby and sapphire are on fire red and leaf green don't worry about the in ruby sapphire or emerald.
The Sapphire Needed to connect with Ruby, Sapphire and Emerald. But some Guy steals it from you and tells you a password for the rocket base
Combined with the sapphire the ruby and sapphire will allow you to trade with ruby and sapphire and emerald.
you cannot connect ruby and sapphire between 2 ds... i have tried this as i do not have 2 gba's... ima sorry but gba's are the only way to communicate between the 2
The main compound in ruby and sapphire is corundum. It is made of transparent materials in both ruby and sapphire.
Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.