Blue Dragon Cheats - Xbox 360

Achievements
Do the following task to unlock the achievement and it's alloted gamerscore:

All Barriers Released (25) - Release all barriers
1,000,000 Gold Accumulated (25) - Accumulate 1,000,000 gold
100 Back Attacks (30) - Successfully pull off 100 back attacks
100 Monster Fights (30) - Set up over 100 monster fights
All Characters Level MAX (50) - Get all characters to level 99
All Warp Clip Set (25) - Activate all warp monuments
Dragon, 1 Category Rank MAX (30) - Max out the rank of one category for Dragon
Dragon, All Category Rank MAX (50) - Max out the rank of all categories for Dragon
Item Dictionary Complete (25) - Complete all entries in the item dictionary
Mechat Shooting, ST1, Perfect (30) - Clear Mechat shooting with no damage
Minotaur, 1 Category Rank MAX (30) - Max out the rank of one category for Minotaur
Minotaur, All Category Rank MAX (50) - Max out the rank of all categories for Minotaur
Monster Dictionary Complete (25) - Complete all entries in the monster dictionary
Phoenix, 1 Category Rank MAX (30) - Max out the rank of one category for Phoenix
Phoenix, All Category Rank MAX (50) - Max out the rank of all categories for Phoenix
Rare Item "Dragon Bracelet" (10) - Find the rare item Dragon Bracelet
Rare Item "Ultimate Conflict Necklace" (10) - Find the rare item Ultimate Conflict Necklace
Rare Item "Ultimate Weapon Bracelet" (10) - Find the rare item Ultimate Weapon Bracelet
Rare Monster "Gold Mecha Robo" (30) - Defeat Gold Mecha Robo
Rare Monster "Golden Unchi-Snake" (30) - Defeat Golden Unchi-Snake
Rare Monster "Ousama Unchi-kun" (30) - Defeat Ousama Unchikun
Simultaneous Encounter, Over 10 Parties (30) - Successfully pull off over 10 parties of simultaneous encounters and defeat all the monsters
Successful Back Attack (5) - Successfully pull off a back attack
Successful Simultaneous Encounter (5) - Successfully pull off a simultaneous encounter
Wagon Defense, Perfect (30) - Clear wagon defense with no damage

Secret Achievements
This is a list of the 18 secret achievements in the Japanese version of Blue Dragon. Complete each task to unlock the achievement. Several of these achievements contain plot points, so read at your own risk!

Complete Mechat Shooting Stage 2 perfectly - 30 points Destroy all machine guns on Mecha Base High and take no damage while completing Mechat Shooting Stage 2.
Complete Mechat Shooting Stage 3 perfectly - 30 points Complete Mechat Shooting Stage 3 without taking any damage.
Get Surprise Attacked 50 times - 0 points Allow monster parties to attack you from behind 50 times.
Install all Mechat upgrade parts - 10 points Obtain all nine Mechat upgrade parts and then install them all at the Mechat Dock. You need not install them all at once.
Moon Laser Perfect - 30 points Complete the Moon Laser mini-game and receive the "Perfect Bonus". (You cannot take damage or hit any of the moons for 0 damage.)
Obtain all dragon items - 10 points Defeat all five dragons and open the chests they leave behind. This achievement unlocks when you obtain the fifth item.
Reach MAX rank for all of the Killer Bat's categories - 50 points Reach rank 99 in all nine categories for the Killer Bat shadow. Do not use a heart item to go from rank 98 to 99 in any category.
Reach MAX rank for all of the Saber Tiger's categories - 50 points Reach rank 99 in all nine categories for the Saber Tiger shadow. Do not use a heart item to go from rank 98 to 99 in any category.
Reach MAX rank in any category for the Killer Bat - 30 points Reach rank 99 in any one category for the Killer Bat shadow. Do not use a heart item to go from rank 98 to 99.
Reach MAX rank in any category for the Saber Tiger - 30 points Reach rank 99 in any one category for the Saber Tiger shadow. Do not use a heart item to go from rank 98 to 99.
Run away 50 times - 0 points Run away from 50 different encounters.
Successfully arrive before the time limit expires - 5 points Reach Nene's throne room at the top of Nene's Fortress before the time limit expires.
Successfully close the door - 5 points Complete the "close the door" dexterity game in the Giant Mechat without allowing any Mecha Robos to get through.
Successfully escape from the Ostrich Mecha Robo - 5 points Complete the Ostrich dexterity game in Nene's Fortress without allowing it to stomp on you and then select run.
Successfully make your shadow emerge - 5 points Complete the shadow dexterity game in Devour Village in a short time. (Do it as fast as you can.)
Successfully pull in the Giant Mechat - 5 points Complete the "pull in the Giant Mechat" dexterity game without angering any of the Gohgohs.
Successfully remove the neck ring - 5 points Complete the neck ring dexterity game that occurs in Nene's Fortress in a short time. (Do it as fast as you can.)
Successfully save Kluke - 5 points Press the indicated button one time each time it appears on screen during the event when Kluke is thrown off the giant green Mecha Robo.

Go SP Yourself
The Barrier Magic has a field skill "Field Barrier 3" which only costs 1 MP (instead of 10) at rank 50. Once you earn and assign this skill, you can venture to places with plenty of enemies you've defeated before and simply walk into them with the Black Belt and Eyepatch accessories (the skills Attract Aura and Regenerate MP at this point are self-explanatory). Some good places would be:

Underground River - The Kelolon Defender Room
Primitive Cube - The Blazing Moths in teh garden
West Ice Field - The Roball racetrack

Unlock Akira Toriyama in "Thank You" Message
After beating the last boss, when you control Shu again and in front of the house, do not go forward into the house. Instead, turn around and head back to the end of this area. Behind the very last tree, you will find Toripa. Speak with him. This is Akira Toriyama special thank you message for playing the game.