Psychic
Hyper Beam
Ice Beam
Surf/Flamethrower/Thunderbolt
Try not to teach Latias or Latios physical attack moves, since both Eon Pokémon have higher special than physical stats. Either Pokémon should hold a Choice Specs (+ special moves by 50%, but allows only that move to be used until the Pokémon is switched out), since it only specializes in special moves.
When choosing Latias' moveset, also consider covering its weaknesses:
Ice, Ghost, Dark, Dragon, Steel, Bug.
There is actually a few things you can do after beating the elite four on Pokemon Emerald Version. First, you should go all around Hoenn and listen to the people who have heard of your outstanding achievement of defeating the Elite Four the the Champion. Then, the next time you see Scott, he will bring you to a place called the Battle Frontier. There are 14 more badges to get over here (or is it 16?). WARNING!! Defeating the Battle Frontier will take you an extremely long time and WILL be frustrating. Just keep on battling and you will do it.
Earthquake Flamethrower Rock Slide Take Down/Hyper Beam OR Earthquake Flamethrower Sunny Day Solarbeam The best thing about Camerupt is its high Atk and Sp.Atk, so you should take advantage of that if you choose to use Camerupt. However, with its low defenses and Speed, it can easily faint to its quadruple weakness Water, so Camerupt isn't recommended for use at the Battle Frontier.
At the Battle Fronitier a house with 2 old ladies. One of them should teach you thunderpunch for the right amount of Battle Points.
Earn battle points(BP) by competing in the; Battle Tower, Battle Dome, Battle Palace, Battle Arena, Battle Factory, Battle Pike, or Battle Pyramid. Once you have earned enough BP then you can visit a house that is all the way to the right of Battle Frontier. It should be north of the Battle Factory. Then talk to either of the old ladies and they will teach your Pokemon moves in return of BP's.
You find latias by first going to the TV at your house in littleroot town after you've beaten the elite four. The TV will say there was reports of something flying in the sky, and your mom will ask you what color it was. ( Say red for latias, blue for latios). Next, buy some max repels, put a level 30 Pokemon at the front of your party, put apokemon with sweet scent in your party, and go to a very grassy area. If you use a max repel and sweet scent, you should be able to get you lati! (Note: you must have a master ball to catch lati.)If you wish to find a Latias or Latios you have to migrate them from one of the three GBA saphire, Emerald, or Ruby.
Stark moutain
Same as flygon
you get tickets in the battle frontier quest (why are you still playing pokemon you should be playing call of duty)
Flamethrower Rock Slide Earthquake Body Slam
they should be roaming the lands :)
it should be able to. Doesn't learn it naturally, but you can teach it if you have the TM or go to the battle frontier and you can pay BP to the old lady to have them teach it that move...(battle frontier is available in Pokemon emerald only though)
save it for Latias, since Latias will always run away while Rayquaza stays in battle.
Go to the battle frontier(after beating elite four) and next to the battle palace there should be an odd dancing tree.Then use a wailmer pail on it and it will go into battle with you.
First you complete both options in the battle places ( e.g. battle dome/pike/arena/pyramid etc) like in the battle dome, there is level 50 and open level. first you do level 50 then open level, and then you should see the frontier brain, if not try any option again, and then hopefully you should be able to see/ battle them.
you should look for at the battle frontier try beating the piramid king
The thing you really want to do the most is challenge the Battle Frontier. Another goal you should aim for is catching all the Pokemon you can, and raising your team to Lvl 100.
if you are cloning at the battle frontier you better follow the correct steps.Try this website http://pokewiids.wordpress.com/2006/08/03/emerald-cloning-glitch/ But you should not lose your original pokemon.