All summon spells
Hold [Up] + [X] and turn on the PlayStation. The title screen will change colors to confirm correct code entry. Start a new game and select a character. Enter "ERUGO no ou" ("ERUGO" in Katakana + "no" in Hiragana + "ou" in Kanji, with no space between all the Kana and Kanji).

Summon Night Stone units
Hold [Up] + [X] and turn on the PlayStation. The title screen will change colors to confirm correct code entry. Start a new game and select a character. Enter "BANPURE seki" ("BANPURE" in Katakana + "seki" in Kanji, with no space between all the Kana and Kanji) to get 30 units of every Summon Night Stone.

Skip conversations
Hold [Select] and press [Square], [Circle], [X], [Triangle] when the location appears before a conversation begins. Press [X] during the conversation to advance through it.

More money
Hold [Up] + [X] and turn on the PlayStation. The title screen will change colors to confirm correct code entry. Start a new game and select a character. Enter "juru" ("ji" + small "yu" + "ru" all in Hiragana) as a name to get an additional 10,000 GP.

More experience
Hold [Up] + [X] and turn on the PlayStation. The title screen will change colors to confirm correct code entry. Start a new game and select a character. Enter "hirokazu" (all in Hiragana) as a name to get an additional 5,000 experience points.