Blue Dragon

Black Barriers
1. Mural Town: Eternity Earring
2. Sea Cube: Renewal Bracelet
3. Lal Mountains Camp: Missile Upgrade Part B
4. Devour Village - Ribbon
5. Exile Forest - Caverns: Lock-On Upgrade Part B
6. Mecha Base - 1F: Ballet Shoes
7. Mecha Base - 2F: Belt of Hermes
8. Mecha Base - 3F: Eternity Bracelet
9. Mecha Robo Cube: Mega HP Up Elixir
10. Mecha Robo Cube: Mega HP Up Elixir

Blue Barriers
1. Ancient Caverns: Bellybutton Ring of Fire
2. Drill Machine - 2F: Ancient Warrior’s Necklace
3. Wilderness Camp: Ancient Warrior’s Bracelet
4. Lot Wilderness East: Cross Trainers
5. Undersea Caverns: Flip-Flops
6. Alumaru Village: Alacrity Elixir
7. Jibral(before you enter the second gates): Poo Bracelet
8. Jibral - Eternal Engine Lab: Shell Earring
9. Baroy Town: Generalist Heart
10. Baroy Town: Flawless Sapphire
11. Baroy Town: Barrier Magic Heart

Green Barriers
1. Lot Wilderness West: Bellybutton Ring of Water
2. Gul Mountains: 3000 Gold
3. Alumaru Village: Mirror Earring
4. Wire Highlands: Cross Trainers
5. Devour Village: Stone Shoes

Red Barriers
1. Mural Town: Black Belt
2. Exile Forest - Caverns: Epistle of the King Ghost
3. Jibral Castle: Lv5-Waterus
4. Jibral Castle Lounge: Shell Badge
5. Jibral Castle Courtyard - Chain
6. Underground River: Shoes of the Ancients
7. Ancient Factory: Crystal Ring
8. Wire Highlands: Crystal Bracelet

White Barriers
1. Mural Town: Gravitic Ring
2. Jibral Castle: Lv6-Groundus
3. Ancient Factory: Ballet Shoes
4. Ancient Prison: Champion’s Belt
5. Pachess Town: Belt of Hermes
6. Pachess Town: Lv6-Zephyrus
7. Pachess Town: Lv6-Quickus
8. Devour Village - Medals(9)

After you have taken enough damage, and you yourself have inflicted damage, there should be an option above the attack that reads 'Corporeal'. It basically turns you into a real monster for a short while, and you will auto kill anything around.

You can find the hidden Boss, Moody Dragon, while leveling up your characters in the Underground River. This Boss is found at random, so this may take some time. Try being at level 27 or above to defeat this Boss. Just use physical attacks, or anything except Shadowa. He has about 2,500 HP. Upon defeating this boss, you will get a nice reward.

If you are looking for the All Item Achievement, you will be looking for all the 1800 "nothings" and trading them to the Nothing Man in Jibral (or the Nothing Robo Mecha in Split Worlds) for items; exploring every other chest in the game will pretty much help augment your item collection. However, there are two accessories you must steal from two different bosses or you will not complete your item collection.

Be sure to steal from the Phantom Dragon south of the Glass Spires on disc 3 for one accessory.

Be sure to Loot or Steal from Ultimate Szabo in the Primitive Cube (Cauldron Room) on disc 3 for the second accessory.

At the end of the Underground River area should be a location with a large number of Kelolon monsters. Use the "Fleeing enemies keep running" glitch to cause the Kelelons to keep running until they all run into the invisible wall that prevents them from falling off the edge. This may take some time as they slowly move sideways across the invisible wall. Eventually ten or more of them will get close enough for you to attack all of them at once. Make sure you keep your Stealth active this entire time or they will jump into the ground and hide, forcing you to start over again.