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.
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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.
ok first you need to have an old copy of emerald other wise this glitch wont work you need to have one rare candy a Pokemon and the battle frontier. first go to the battle tower then go to the PC. save your game then give a rare candy on a Pokemon put the Pokemon in your PC and then save then take the Pokemon out of your PC and talk to one of the tower ladies. she should make you save ur game when it says saving restart ur game. u should start in front of the PC. check ur PC then check ur party the Pokemon u put the rare candy on should be cloned with rare candy keep doing this until u have enough rare candies.