The following are known CWCheat Codes for Persona 3 Portable on Sony Playstation Portable (PSP).

_S NPJH-50040
_G Persona 3 Portable (PlayStation Store) [JP]
_C0 128x Experience After Battle
_L 0x202572fc 0x000511C0
_C0 16x Experience After Battle
_L 0x202572fc 0x00051100
_C0 256x Experience After Battle
_L 0x202572fc 0x00051200
_C0 2x Experience After Battle
_L 0x202572fc 0x00051040
_C0 32x Experience After Battle
_L 0x202572fc 0x00051140
_C0 4x Experience After Battle
_L 0x202572fc 0x00051080
_C0 64x Experience After Battle
_L 0x202572fc 0x00051180
_C0 8x Experience After Battle
_L 0x202572fc 0x000510C0
_C0 Academic
_L 0x00666898 0x000003E7
_C0 Academic, Charm, Courage
_L 0x80666898 0x00030001
_L 0x100003E0 0x00000000
_C0 Academics,Charm,Courage
_L 0x406671F5 0x003F0001
_L 0x60606060 0x00000000
_L 0x80666898 0x00030001
_L 0x100003E0 0x00000000
_C0 All Compendium Open
_L 0x21397164 0x03E7270F
_L 0x21397168 0x636303E7
_L 0x2139716C 0x63636363
_L 0x213971E0 0x270F270F
_L 0x213971E4 0x03E703E7
_L 0x213971E8 0x63636363
_L 0x21397260 0x03E7270F
_L 0x21397264 0x636303E7
_L 0x21397268 0x63636363
_L 0x213972DC 0x270F270F
_L 0x213972E0 0x03E703E7
_L 0x213972E4 0x63636363
_C0 All Items
_L 0x406671F5 0x003F0001
_L 0x60606060 0x00000000
_L 0x80666898 0x00030001
_L 0x100003E0 0x00000000
_C0 All Skill Cards
_L 0x40667384 0x003E0001
_L 0x60606060 0x00000000
_C0 All time Cutin
_L 0x201c9060 0x00000000
_L 0x201c9080 0x10000003
_L 0x201c90b4 0x1000038e
_C0 Charm
_L 0x0066689A 0x000003E7
_C0 COMMU
_L 0x200101a8 0x00000000 
_C0 Condition MAX
_L 0x2000E3C0 0x24050002
_C0 Courage
_L 0x0066689C 0x000003E7
_C0 Equip All
_L 0x00666CF5 0x00000060
_L 0x10666CF6 0x00006060
_L 0x40666CF8 0x01260001
_L 0x60606060 0x00000000
_C0 EXP X 2
_L 0x202572FC 0x00051040
_C0 EXP X 256
_L 0x202572FC 0x00051200
_C0 Great Status At All Times
_L 0x2000e3c0 0x24050002
_C0 Health Status-Normal
_L 0x0066BBB4 0x00000000
_C0 Health Status-Sick
_L 0x0066BBB4 0x00000005
_C0 Health Status-Tired
_L 0x0066BBB4 0x00000003
_C0 Hero EXP
_L 0x006668A0 0x000003E7
_C0 Hero HP
_L 0x00666864 0x000003E7
_C0 Hero LV
_L 0x00666862 0x000003E7
_C0 Hero SP
_L 0x00666866 0x000003E7
_C0 High Grow
_L 0x202576A0 0x2403022B
_C0 Invisible
_L 0x200c7404 0x24020000
_C0 Item All
_L 0x406671F5 0x003F0001
_L 0x60606060 0x00000000
_C0 Junpei HP
_L 0x0066BB74 0x000003E7
_C0 Junpei SP
_L 0x0066BB76 0x000003E7
_C0 Max academic, charm and courage
_L 0x20174264 0x240603e7
_C0 Max Money
_L 0x2066B3C4 0x0098967F
_C0 Money
_L 0x2066B3C4 0x0098967F
_C0 No LV Limit (Persona Fusion)
_L 0x2005c338 0x00000000
_C0 No Lvl limit when creating persona
_L 0x2005c338 0x00000000
_C0 NonDec HP&SP (Skill Use)
_L 0x20001f00 0x03e00008
_L 0x20001f04 0x24020000
_L 0x20233a3c 0x0a2007c0
_C0 Persona Max Stats
_L 0x11397162 0x0000270F
_L 0x113971EC 0x00006363
_L 0x1139725E 0x0000270F
_L 0x113972E8 0x00006363
_C0 Select+[Up]repeat [Down]normal
_L 0xD0000000 0x10000011
_L 0x2000EC18 0x00000000
_L 0x2000EC30 0x00000000
_L 0xD0000000 0x10000041
_L 0x2000EC18 0xA0447486
_L 0x2000EC30 0xA044748E
_C0 SKILLCARD 
_L 0x40667384 0x00400001
_L 0x60606060 0x00000000
_C0 Total Recovery (After Battle)
_L 0x201bfdac 0x24020001
_C0 Use skills without consuming HP/MP
_L 0x20001f00 0x03e00008
_L 0x20001f04 0x24020000
_L 0x20233a3c 0x0a2007c0
_C0 Using Persona skills does not consume HP/SP
_L 0x20001F00 0x03E00008
_L 0x20001F04 0x24020000
_L 0x20233A3C 0x0A2007c0
_C0 Yukari HP
_L 0x0066B82C 0x000003E7
_C0 Yukari SP
_L 0x0066B82E 0x000003E7