Things You'll Need
Instructions
Insert the Action Replay cartridge into your Nintendo DS device and attach your "Pokemon SoulSilver" game cartridge to the Action Replay.
Turn on your Nintendo DS and scroll through the list of pre-loaded games until you see "Pokemon SoulSilver." Scroll up to the "New Code" option and press the "A" button on your Nintendo DS to select.
Enter the code "94000130 fcff0000" (without the quotation marks) and press the "Start" button on your Nintendo DS to save the code and launch the game.
Walk or fly to the nearest Pokemon Center. Enter the Pokemon Center and walk to the PC located on the far-right corner of the center.
Face the PC and press the "A" button to access the computer. Select the "Withdraw Pokemon" option and open "Box 1." If you have entered the code correctly, Celebi should appear inside the box.