Beat the game and start a new one using your cleared data. You can play through again with all of items and money you earned the first time through as well as the option to choose a new party leader.

Stay on the Island
On the deserted island after the ship is wrecked you can convince your party members to stay on the island and live there. Eventually they will agree and you will become stuck on the island. The character portraits will also be different. Note: This will end your game so have a saved game before deciding to stay.

Want to level up your characters' weapon or buy better armor? Instead of defeating a lot of enemies for a quick buck, stock up on crystals/pearls at the various trade stands on the different islands talk to the guy by the trading stand in Nal-nal Harbor. He will most likely tell you that one of the items is being sold for tons of money. After he does, sell which ever item is mentioned and you can make up to 340,000 potch at a time especially if it is pearls!

Successfully complete the game, then start a new game by starting from your cleared game file. You will begin with your previously earned money and items, except for certain plot items. The entire map will already be available. You can also select a new person to lead your party and press X to skip the intermission sequences.

Successfully complete the game with all 108 Stars of Destiny collected.

Note: Save the game before attempting this. When you first go to the deserted island after your ship is wrecked, keep answering repeatedly that you want to live there. You will skip a few scenes and lose Lilin, but the pictures of the characters will turn to badly drawn black and white versions.

Ask Helmut to join you after the ship battle to retake Razril.

At Na-Nal Island, talk to the people in town to learn that a Rune Master is staying at the Rune Shop. Go to the Rune Shop and ask the clerk to see the Rune Master. Ask Jeane to join you, and she will.

After getting all of the other 107 characters, go to Mordo Island. Talk to the man there, and he will say that he saw something floating in the water. Go west of Mordo Island to find Snowe clinging to a log. Ask him to join you and he will do so. Note: You must have spared Snowe's life by asking him to join you the previous two times that you saw him.