Instructions
Start "Pokemon White" or "Pokemon Black" version on your Nintendo DS.
Wait for the legendary Pokemon Zerkom or Reshiram to appear on the title screen.
Press and hold the "Up," "Select" and "B" buttons on the Nintendo DS console.
Choose the "Yes" option to remove the saved data on the "Pokemon" game.
Enter the "New Game" option from the main menu to start a new save file in your version of "Pokemon."