Re-board the S.S. Anne
To Re-board the S.S. Anne, have a Pokemon that knows Surf with you. Go to the guy who says "the ship set sail". You'll be diagnall from him. now go in front of him and save. Turn your GB off and back on. Use your SURF Pokemon and hold DOWN. You'll be SURFing on the guy. Press DOWN the after SURFing, and you should be in the ship.