The following are known CWCheat Codes for Knights in the Nightmare on Sony Playstation Portable (PSP).

_S ULJM-05502
_G Knights in the Nightmare [JP]
_C0 Char. Status
_L 0x8044B266 0x0075000C
_L 0x10002710 0x00000000
_L 0x8044B268 0x0075000C
_L 0x10002710 0x00000000
_L 0x8044B26F 0x00750018
_L 0x00000063 0x00000000
_L 0x4044B270 0x00750006
_L 0x64636363 0x00000000
_C0 Damage. Mult.
_L 0x2009E13C 0x00108YY0
_L 0x2009E140 0x10800009
_C0 Damage. Mult. 16x
_L 0x2009E13C 0x00108100
_L 0x2009E140 0x10800009
_C0 Damage. Mult. 2x
_L 0x2009E13C 0x00108040
_L 0x2009E140 0x10800009
_C0 Damage. Mult. 4x
_L 0x2009E13C 0x00108080
_L 0x2009E140 0x10800009
_C0 Damage. Mult. 8x
_L 0x2009E13C 0x001080C0
_L 0x2009E140 0x10800009
_C0 Damage. Mult./ restore
_L 0x2009E13C 0x30850001
_L 0x2009E140 0x10A00009
_C0 Death Stroke
_L 0x2009AF5C 0x00003021
_C0 Death Stroke/ restore
_L 0x2009AF5C 0x00A4302B
_C0 Destroy Objects
_L 0x200F74C8 0x14800023
_L 0xD0000000 0x10000110
_L 0x200F74C8 0x00000000
_C0 Exp. Mult. 16x
_L 0x2009CD24 0x00042900
_C0 Exp. Mult. 2x
_L 0x2009CD24 0x00042840
_C0 Exp. Mult. 4x
_L 0x2009CD24 0x00042880
_C0 Exp. Mult. 8x
_L 0x2009CD24 0x000428C0
_C0 Exp. Mult./ restore
_L 0x2009CD24 0x00802825
_C0 Fixed Time
_L 0x2013A270 0x03E00008
_L 0x2013A274 0x00000000
_L 0x20138080 0x00000000
_L 0x20138088 0x00000000
_C0 Fixed Time/ restore
_L 0x2013A270 0x27BDFFD0
_L 0x2013A274 0xAFB00000
_L 0x20138080 0xA6640030
_L 0x20138088 0xA6650028
_C0 Free Smith
_L 0x200E9458 0x00000000
_L 0x200E948C 0x00000000
_C0 Free Smith/ restore
_L 0x200E9458 0xA4A8000E
_L 0x200E948C 0xA4A40000
_C0 Immortal
_L 0x201155CC 0x00402021
_C0 Immortal/ restore
_L 0x201155CC 0x00502023
_C0 InF EXP
_L 0x2043D0C8 0x2028B09A
_C0 Keikenchi 9999999 (EXP 9999999)
_L 0x2043D0C8 0x0098967F
_C0 Key Item ALL
_L 0x4044BF00 0x00D60001
_L 0x000C80A9 0x00000001
_L 0x2044C530 0x000000D6
_L 0x0044C534 0x000000D6
_C0 Kyouka Sozai 99
_L 0x8044CD88 0x000D0002
_L 0x00000063 0x00000000
_C0 Last MAP
_L 0x0043D116 0x00000030
_C0 Law Start (To blue Scene)
_L 0x0043D0DB 0x00000001
_C0 Leveling Map ALL
_L 0x0043D0DA 0x00000030
_C0 Max All materials
_L 0x8044CD88 0x000D0001
_L 0x100003E7 0x00000000
_C0 Monster HP = 1
_L 0xE0020001 0x3044D734
_L 0x4044D734 0x001E0008
_L 0x00000001 0x00000000
_C0 MP Max
_L 0x1044D3F8 0x000003E7
_C0 Open Chests
_L 0x200F75A4 0x00A4202B
_L 0xD0000000 0x10002100
_L 0x200F75A4 0x00002021
_C0 Rigid Weapons
_L 0x200E95B0 0x00000000
_L 0x200e72D8 0x00000000
_C0 Rigid Weapons/ restore
_L 0x200E95B0 0xACA40000
_L 0x200e72D8 0xACA40000
_C1 Unit ALL(Always cheat on please)
_L 0x8044B264 0x00780018
_L 0x00000021 0x00000000
_L 0x8044BEF0 0x00780001
_L 0x00000000 0x00000001
_L 0x1044BF76 0x00007878 
_C0 VIT 99.99
_L 0x8044B30E 0x00XX0012
_L 0x1000270F 0x00000000
_C0 Weapon ALL
_L 0x4044BF00 0x00A80001
_L 0x000C7201 0x00000001
_L 0x2044C530 0x00A800A8
_L 0x0044C534 0x00000000