Things You'll Need
Instructions
Train each Pokemon in your party to at least Level 45 in "Pokemon Sapphire" or "Pokemon Ruby." Beat Roxanne, Brawly, Wattson, Flannery, Norman, Tate and Liza, Winona and Wallace to get the eight gym badges.
Travel through Victory Road and beat the Elite Four members. Defeat Steven's Steel-type Pokemon to become the new Pokemon League Champion. If you have a party of six, place one Pokemon into the Pokemon Storage System.
Save your game in a Pokemon Center. Power off your Game Boy Advance and your GameCube. Hook up your GameCube and your Game Boy Advance with the GameCube to Game Boy Advance Link Cable.
Power on your GameCube. On the main menu, select "Jirachi Special Gift," which is the second option. Press "A" to confirm that you used the Link Cable to connect your GameCube with the Game Boy Advance. Select "Yes" to verify that you have a free space in your party in "Pokemon Sapphire" or "Pokemon Ruby."
Turn on your Game Boy Advance. The GameCube will communicate with the GameBoy Advance to send the Jirachi to "Pokemon Sapphire" or "Pokemon Ruby." After about 15 seconds, the download will complete. Check your party in "Pokemon Sapphire" or "Pokemon Ruby." You will see a Level 5 Jirachi in the last slot.