First of all, make sure the ship has set sail. 
So you have to stand on a diagonal to the man. 
Now move to the right while while pressing start and save the game.
Now turn the game off and turn it back on again. You should be facing the right.
Now use surf. Instead of going to the side, you will go down.

Now go down again, and you can now enter the S.S. Anne.


by pokéglitch, extracted from http://pokeglitch.tripod.com/id4.html which contains several other surf-related glitches.
