Item Codes
As you progress through "Summon Night: Twin Age," you can pick up or purchase a variety of items. To unlock all consumable items at the start of the game, enter the following code:
C0000000 00000054
122F41AC 00006363
DC000000 00000002
D2000000 00000000
To gain access to all weaponry and armor, the following code may be entered instead:
C0000000 00000017
122F4274 00006363
DC000000 00000002
D2000000 00000000
Alternatively, you may decrease the cost of every single item in the shop to zero by entering this code, meaning that you can purchase everything in the shop without spending any money:
920B2B40 00005683
C0000000 00000063
02140E30 00000000
DC000000 00000001
D2000000 00000000
Walk Through Walls
To allow your selected character to walk through walls, enter "2238E3A6 00000001" as a code. This allows only the main character to walk through walls, however, not the other members of their party. To allow your character to go through any obstacles in the game, type in the following:
5201865C 1A000010
1201865E 0000EA00
D0000000 00000000
Character Switch
At the start of "Summon Night: Twin Ages," you chose from between having Aldo or Reiha as their main character. To switch from Aldo to Reiha as your main character during the game enter "222F0000 00000000" into your Action Replay. Alternatively, "222F0000 00000001" is the code for switching from Reiha to Aldo as your main character. You may also edit the supporting character they travel with, meaning that you can have two Aldos or two Reihas during gameplay. For Aldo as a supporting character enter "222F0094 00000000," while "222F0094 00000001" will give you Reiha as support.
Battle Codes
As with most other role-playing games, "Summon Night: Twin Age" features a series of battles you must win in order to progress. During a battle, you can enter "022F0004 000F41DC" to give character one infinite health points, making it impossible for them to die. "022F0098 0026FF98" does the same for character two. The main character can be given maxed out stats for its attack, magic and defense abilities during a battle by using the following code:
022F0010 03E703E7
122F0014 000003E7