Things You'll Need
Instructions
Connect the two Game Boy Advances using the Game Boy Advance Link Cable.
Start both games and travel to the second floor of any Pokémon center. In "Pokémon Emerald," have your character go to the "Direct Corner" on the far right of the room and select the option for "Record Corner." In "Pokémon Ruby" or "Pokémon Sapphire," your character should go to the "Record Corner" on the far right.
Use the machine to mix records. When prompted to set Player 1, choose the game containing the Eon Ticket. Have both characters sit in a chair and your records will be mixed. If Player 1 has a transferable Eon Ticket, it will appear in your inventory.
Leave the "Records Mixer" when you have completed the mix. Save your game. You can now disconnect the two Game Boy Advances.