Things You'll Need
Instructions
Connect the Game Boy Advance consoles together using the link cable.
Place the respective Pokemon games into the consoles and turn them on.
Take your character in each game to the nearest city (use the map in the main menu to find your way). Once in the city, go to the Pokemon Center.
Use the personal computer (PC) in the Pokemon Center in the "Pokemon Ruby" game to retrieve Groudon (if Groudon is not already in the party).
Take each character to the Trade Center in their Pokemon centers and initiate a trade session.
Trade Groudon over to the copy of "Pokemon Sapphire" via the on-screen dialog.