Summon Night

Cheats

Extra GP and XP (Japanese Version).

Hold down up and (X) while switching your PS on and keep holding until the title screen changes colours. Now when selecting your character, put the following names for different unlockables.
Code                    Effect
Write name as "BANPURE seki"	Get 30 of every Summonite Stone
Write name as "juru"    Get Additional 10,000 GP
Write name as "Hirokazu"Get additional 5,000 XP
Write name as "ERUGO no ou"	Unlock all Summons


Fast Forward Cutsenes.

Right before a cutscene starts and they show you a screen with the place, hold Select and press Square, (O), (X), and Triangle. Now during this scene, holding down (X) makes the cutscene go faster.