I need to help my friend out and I forgot how I got through.
here is a video to how to navigate it thought it just a part: http://www.youtube.com/watch?v=ySU7I7nY6yI the rest is here: http://www.youtube.com/watch?v=RjNSlpwYFww
Here are the answers: http://www.marriland.com/black2_white2/walkthrough/pokemon-league/4196-giant-chasm http://www.youtube.com/watch?v=mBOICcTulM8