Things You'll Need
Instructions
FireRed/LeafGreen Method
Load a copy of "Pokemon FireRed" or "Pokemon LeafGreen" into your GBA. Power it on and press "Select" and "B" together at the title screen. Press "A" to confirm.
Load a copy of "Pokemon Sapphire" into a second GBA and turn the system on.
Connect the two GBAs using a GBA Link Cable so that the console with "Pokemon FireRed" or "Pokemon LeafGreen" is Player 1 and the one with "Pokemon Sapphire" is Player 2.
Press "Start" and "Select" at the title screen for "Pokemon Sapphire" to transfer the patch to fix the Berry Glitch.
GameCube Method
Load a copy of "Pokemon Colosseum," the "Pokemon Colosseum" Bonus Disk or "Pokemon XD: Gale of Darkness" into your GameCube and turn it on. Go to a Trade Center and speak with the person at the desk to initiate a trade between the GameCube and a GBA.
Load your copy of "Pokemon Sapphire" into the GBA and power it on. Connect the GBA to your GameCube using a GBA/GameCube Link Cable.
Wait for the GameCube to recognize your GBA; the patch to fix the Berry Glitch will be automatically downloaded to "Pokemon Sapphire."