Head to the bottom and enter your password. Meet Niko. He will be surprised to see you. This time he will provide a more challenging challenge. If you win you will obtain BOMBS. They are like bomb flowers but you can use them anytime. Not bad. Once you are done go back to the Island and check the mail. You will get the Beedle Chart! Now you can find his shops. Now go into your ship and go to Outset Island.