Im looking for an old cartoon network tv show where a group of teens would go into a reality like computer game and would do this in each episode. They would occasionally save their town or the world. All I remember is that there was one blonde nerdy kid with a group of others. Wish I could get more info but just can't remember. All the episodes I remeber is one called vertigo where the apparent badass of the group has vertigo and that's really all i know.