The first time you are in Darilsheid castle, you can get some items and equipment from two little armories. Return to the rooms when the aethersphere starts to form to find new and better equipment.
Blue Dragon Summon Disc
Here's how to get the Blue Dragon summon disc:
1. In Cloudius, once you've beaten Baruk, search his chair before you leave to find an Egg.
2. Once the Aethersphere covers the whole world, take the egg to Lilith in Linea. She will beg for Stahn to give it to her. Being the kind-hearted soul you are, Stahn will give it to her.
3. After a certain amount of time has passed, when you enter Stahn's house an event will occur in which a baby blue dragon will hatch from the egg.
4. Feed the baby dragon all 4 Goumets (A-D) and it will become an adult dragon and give you the Blue Dragon Disc!
Get the BC Rod
To get the BC Rod, go to Walt's house late in the game. (The guy you sold the Old Cane to.) Go into Walt's room, and search the dresser. You will find the Old Cane. Use a R. Bottle or Philia's ability "Identify" and you will get the BC Rod.
Helios Passwords
Type in GIFT or OGRE for items at Helios. Use the password FATE to get through the door.
Infinite Gold
To do this trick you need Philia to be at a high enough level to have the special that acts as a R.Bottle.Go to a place that sells apples, buy as many as you can, then use that special to turn them into W.apples then to jams that are WORTH TEN TIMES AS MUCH as much as apples. Sell those off and buy more apples. Repeat as desired.
Multi-player mode
Collect a Channel Ring and equip it on the character below Stahn. Press Select on controller two to use that port to control that character. Note: Repeat this code on other characters to use more controllers and a multi-tap to control up to four characters manually in the game.
Secret Ending
To see the concluding dialogue, defeat Leon in Harmentz village.
Secret Lens Shop
The secret lens shop is located on a small white island just south from Hermez village. Just walk to the forest and you will find it.
Secret Seed Shop
On the coast west of Junkland, there's hidden seed shop. You can use Draconis to go there.
Use unknown magic
Note: Save the game before using this code since it may cause the game to freeze or act erratically. Enter the magic menu during a battle and continuously tap Up. The pointer will eventually enter an area of the screen that will allow magic that has not been learned yet to be selected.