How do you pass the 8th gym in Pokemon sapphire version?

How do you pass the 8th gym in Pokemon sapphire version?
Zibit Answered First
Well, there's a really specific pattern to follow to get to the gym leader (across the ice, that is), and for more inforamtion head to this site: http://www.psypokes.com/rs/images8thgym.png As for him, go to this site: http://www.psypokes.com/rs/walkthrough.php?part=8 It's on the bottom of the page.
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Where is the eighth gym on pokemon sapphire?

  Sootopolis. You have to go through the whol Kyogre episode then the gym will open up. (Sootopolis is the white place you have to dive to get into.)

Thanks for the feedback!