* The electric fence is a plot device: It's there to prevent you from entering the area until you've completed the necessary tasks to progress the story.
* You need to defeat the Elite Four: Before you can enter the area beyond the electric fence, you must defeat the Elite Four and become the Pokemon League Champion.
* Focus on training: Use this time to train your Pokemon and prepare for the challenging battles ahead.
Let me know if you have any other questions about Pokemon SoulSilver or need help with anything else!