CheatCodes.com has all the official Final Fantasy III DS cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Monday May 20, 2013 for Final Fantasy III are shown below. We also have this game on Nintendo DS, iPhone, and sometimes tricks from other game systems will also work on Nintendo DS.
The iron giant is an optional boss you can fight. To get to it, you have to send mail to eight friends via wifi connection. Then send mail to the 4 old men and then king allus. Make sure you have the ship that can go underwater. Go right of the floating continent where you started the game. You can train on red, yellow, and green dragons there if you want. The iron giant has roughly 200, 000 health. MAKE SURE YOU HAVE A GOOD HEALER! I used a devout but you can use whatever you want. Make sure you have some elixers also. You can get them by fighting the dragons in the cave. ALWAYS HAVE YOUR DEVOUT CAST CURAJA ON ALL PARTY MEMBERS. EVEN ON THE FIRST TURN. I recomend having all job levels at 99. After his health is about 1/2 gone, he will attack all of your guys with swipe. It does a considerable amount of damage. A minimum level for beating it would be about 85.
To all of you who play the game first and ask questions later, here is the best hint I can give at my current knowing of this game. If you have a guest character in your party/team, hit the Y button to reveal hints to help you on either boss weaknesses or even know what they have on their minds.
The first airship you get is Cid's airship, you are required to talk to the ghost form Cid in the Inn of Kazus. Once you find the airship, you meet the 3rd main character in the game.
To beat the rat in the dragons mouth, you need to have all your characters using magic, physical attacks do nothing. Thunder works the best, but use your items and the fire staff. Attack it a few times and it will be gone.
During game play, get the item that you want to duplicate and move it to the top of your item list. Go get into a fight. When you pick what you want to do, go to items. Click up+a at the same time. If done correctly it will go to the part where you select the person/monster you use it on. Push B and go back to your items. You will see your items has been duplicated. Repeat as much as you want. Just don't try to get more than 99, it will mess your game up.
Once you defeat Gutsco the Rouge twice you get the Ranger, Knight, Scholar, and Geomancer jobs
Sometimes cheats for other video game systems also work on Nintendo DS games. Try Final Fantasy III on Nintendo DS and iPhone.
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