When one of your characters learns the spell Boost and gets it to level 2, use it and make sure you get your ENTIRE party in range. This will give 49 Exp. to the one who casted Boost L2 REGUARDLESS of what level anybody may be in (which is, like killing a formitable monster that might be much stronger than you). Then, when the Boost effect wears off, you can repeat this sequence and easily get to level 99!
If you put in the code to control enemies in the Fairy Village, previously known to the public, they would not spawn. To get around this, start the battle as normal without the code on. Have a teammate block the appropriate spots to prevent the stronger enemies from spawning if needed.Afterwards, have someone run to a spot that spawns the enemy you wish to farm. Wait your turn so it can spawn. As soon as it spawns, on your very next turn, save and quit. Enter the code and select control enemies. Make sure this is after the enemy has spawned.Restart the game. Enjoy. You may now control very strong enemies that infinitely respawn. If you decide to spawn an enemy in a different spot, just do the same. For example, you use this to farm lesser demons but haven't spawned a Mist Demon, you must reset the game with control enemy off and allow it to spawn, then save mid battle to get control over them, to allow them to respawn.
After selecting the name for the main character, hold [START] as you choose "End." Another name screen will pop up for another character and you get to name everyone else.
Give a healer any HP restoring item (I.e. Medical Herb), and use it on themself. This will garner a quick 10 experience points for the healer. If you don't have herbs, use Heal 1 until you run out of MP. You could possibly have Heal 4 and Blast 4 for Sarah before you even finish the first battle in the game if you do it right. Also, if you use Aura and have 3 or more people in the targeted range, the healer will get 25 experience for their effort. If you use Detox on one, the healer will only get 5 experience. Make sure to do this trick if you want easy victories.
Trying to get that spell to always hit or get that +4 on all your power up items, but you just can't seem to get the random to work for you? Well I discovered the counter to the random number generator is the number of steps taken.
Say you save your game and use an item for a stat increase. Well if its not what you wanted, reload and take one more step befor using it. The pattern I noticed was something like 2, 3, 2, 3, 3, 2, 4. Thus taking 5 steps gave me my +4. This works for spells that don't hit very often. Fun with desoul.
While the Sega logo is on screen enter the following:
There is one more battle you can do once the game is completed. Once you've defeated Zeon, watched the end credits, and reached the ''FIN'' screen with the two jewels, wait for about 2 mins. A message will appear that says ''and more...''. press a button and you will begin a special battle with all of the old greater devils.
When the witch asks you to select your file, select a file already beaten (or set a file with the config code) and hold Up and Start and press A.