Question: what can you do after you beat pokemon emerald?
Answer:  Go to Battle Frontier and get the Gold Symbols.,  Defeat Steven in Meteor Falls. |Steven's Pokémon| ... ,  Catch new Pokémon in the East section of the Safari Zone.,  Battle Trainers on the S.S. Tidal.,  Catch Groudon, Kyogre, and Rayquaza. |TIP| ... ,  Hunt down Latias or Latios.