Things You'll Need
Instructions
Insert the Action Replay device into the DS cartridge slot and attach the "Pokemon Pearl" cartridge to the Action Replay device.
Power on your Nintendo DS console and click the "Add New Code" link in the Action Replay main menu.
Input the following code into the box, including spaces, and press "Enter."
94000130 FCFF0000 B21C4D28 00000000 b0000004 00000000 0000AA3C EDB88320 2000AA68 00000009 D2000000 00000000
Scroll through the list of codes and click on the folder titled "Event Modifier Codes." Inside the folder will be a "Oak's Letter" code; select it by pressing the "A" button on your DS console.
Press the "Start" button on your Nintendo DS to begin the game. In the game, fly or walk to the nearest town and stand in front of the Pokemart.
Locate the "L" and "R" buttons located close to your index fingers. You will need to press the two buttons at the same time as you press the "Up" arrow key to walk into the store.
Walk up to the counter and speak with the Pokemart clerk. He will hand you a letter given to him by Professor Oak.