This depends. If you haven't beaten the Elite Four yet, that's what you need to do. With your lv. 70 Rayquaza it is much easier. If you have already beaten the Elite Four, try the Battle Frontier. If you have already done that, try catching rare pokemon, like Regirock, Regiice, Registeel, Latios, ect. After you have done that, well, there's not much left to do.
Hope this helps!
Master
you can capture him if you get a master ball and look for the sky pillar in the sea near pacifidlog cit that's all.
One word:ANYWHERE.
its not an emerald its RAYQUAZA the main legendary Pokemon in Pokemon emerald.
TWO WORDS:FIRE. TYPES.
Just keep on playing.
You cannot get a Yanma in Pokemon Emerald, as only Hoenn Region Pokemon can be found in Pokemon Emerald.
There is no PalPark in Pokemon Emerald.
Sinnoh Pokemon DO NOT EXIST IN EMERALD!!!
rotom isn't in Pokemon emerald
emerald no doubt
where do you get the spade from on Pokemon emerald
where can i find groudan in Pokemon emerald