Cosmos increase[edit]
After receiving the Pegasus Cloth, whenever you win a fight against a Saint, or another turn-based challenger, the doctor will be available at the hospital to fully restore your wounds. Before you start another fight, proceed to the hospital and distribute all of your Damage to your Cosmos until you are down to a single Damage point. This will boost your Cosmos to a higher level. Then enter the hospital to have your Damage restored. By taking advantage of this, you can ensure that you will have enough Cosmos to survive many battles.
Infinite Experience[edit]
This cheat only exists in the Japanese version. It is corrected in the French version, and the English translation which is based upon the French version. In the middle of the game, press 
to go to the subscreen, and choose to look at your Data (のうりょく). Put the cursor next to End (おわり), and press 
+
or 
+. The cursor should move to a location on the right side of the screen. Then tap 
to increase your experience points.
Revival[edit]
If you travel from the town and into the cave, and allow yourself to be attacked so that your health is reduced to 0, press to go to the subscreen, and choose to look at your Data (のうりょく). Go to your DAMAGE, and increase the value at the cost of some Cosmos, and you will be revived.
Level 40[edit]
This cheat only works in the Japanese version. It is unknown what the correct code is for the French version, and the English translation which is based upon the French version. On the password screen, enter the password:
とうきょうとたいとうくこまがたばんだいのがんぐだいさんぶのほし
The French code is:
TU*AS GAGNE!! TU*ES PASSE.. MAITRE
When inputting this password, you will be able to increase the level of your abilities beyond the normal Level 20 cap, all the way up to Level 40.