After defeating the Elite Four and becoming champion, go to the Weather Institute and talk to one of the guys there. He will say there's a weather anomilie on a certain route. Go there and you will find groudon or kyogre. Catch it and then go back to the guy and he will talk about another route where you can catch the other pokemon.
You can't get Groudon in Emerald. You get Groudon in Ruby, as long as you don't make it faint like I did.
When you get Rayquaza to stop Kyogre and Grouden from fighting Wallace will give you waterfall but then you have to get sootopolis gym badge to do it.
no you can't
Legendary pokemon you can find in emerald are (without cheats & events) Rayquaza, Groudon, Kyogre, Regirock, Regice, and Registeel.You can get latios OR latias in pokemon emerald too.rayquaza,kyogre,grouden,jirachi,deoxys and i think mew
Go to Rayquaza in Sky Pillar on route 131
Nothing, you just continue the game without catching them.
catch him in the cave of origin in sootopolis after beating team magma
its not an emerald its RAYQUAZA the main legendary Pokemon in Pokemon emerald.
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