You will need to elaborate on that, for I've never heard of a "Pokemon convention" in Emerald.
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.
the convention is near route 126 the convention is near route 126
go to mossdeep city then head left and go past the white rock at the end their should be a house with a fisherman in it and he will give it to you
latios and latias appear in random patches of grass and areas of water after you catch Rayquaza or make him faint.(after saving the world in Sootopolis.)
Many years ago. Not again. Sorry.
ABXY
Sadly, no. The creators of the game forgot to add in the Pokedex, so trading is impossible without GameShark. :(
use action replay
dfg tyhgtg
You can download it at 4 SHARED.
at mt. pyre
yes there is. just fly there if you can