The following are known CWCheat Codes for Monster Kingdom: Jewel Summoner on Sony Playstation Portable (PSP).

_S UCJS-10026
_G Monster Kingdom: Jewel Summoner [JP]
_C0 99 of All Items
_L 0x8030B5E0 0x00580001
_L 0x00000063 0x00000000
_C0 AP max
_L 0x2030B380 0x000F423F
_C0 Daizina mono 99
_L 0x0030B644 0x00000063
_L 0x0030B645 0x00000063
_L 0x0030B646 0x00000063
_L 0x0030B647 0x00000063
_L 0x0030B648 0x00000063
_L 0x0030B649 0x00000063
_L 0x0030B64A 0x00000063
_L 0x0030B64B 0x00000063
_L 0x0030B64C 0x00000063
_L 0x0030B64D 0x00000063
_L 0x0030B64E 0x00000063
_L 0x0030B64F 0x00000063
_L 0x0030B650 0x00000063
_L 0x0030B651 0x00000063