Instructions
Insert the "Pokemon SoulSilver" game cartridge into your Nintendo DS and turn the system on.
Tap the "Pokemon SoulSilver" icon with your stylus to begin the game.
Press "Start" or tap the title screen with the stylus to access the Options menu.
Highlight your data, then simultaneously press and hold the "Up" button on the directional pad, the "B" button and the "Select" button. Select "Yes" when asked if you want to delete your data. All of your badges will be deleted.