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

_S ULJM-05091
_G Gradius Portable [JP]
_C0 GRADIUS 3: GAGE ?
_L 0x10A5A61A 0x00000006
_C0 GRADIUS 3: GAGE DOUBLE
_L 0x10A5A61A 0x00000001
_C0 GRADIUS 3: GAGE LASER
_L 0x10A5A61A 0x00000000
_C0 GRADIUS 3: GAGE MISSILE
_L 0x10A5A61A 0x00000002
_C0 GRADIUS 3: GAGE OPT
_L 0x10A5A61A 0x00000005
_C0 GRADIUS 3: GAGE SPEED
_L 0x10A5A61A 0x00000001
_C0 GRADIUS 4: GAGE ?
_L 0x102ADCFA 0x00000006
_C0 GRADIUS 4: GAGE DOUBLE
_L 0x102ADCFA 0x00000003
_C0 GRADIUS 4: GAGE LASER
_L 0x102ADCFA 0x00000004
_C0 GRADIUS 4: GAGE MISSILE
_L 0x102ADCFA 0x00000002
_C0 GRADIUS 4: GAGE OPT
_L 0x102ADCFA 0x00000005
_C0 GRADIUS 4: GAGE SPEED
_L 0x102ADCFA 0x00000001
_C0 GRADIUS G: GAGE ?
_L 0x1066608A 0x00000006
_C0 GRADIUS G: GAGE DOUBLE
_L 0x1066608A 0x00000003
_C0 GRADIUS G: GAGE LASER
_L 0x1066608A 0x00000004
_C0 GRADIUS G: GAGE MISSILE
_L 0x1066608A 0x00000002
_C1 GRADIUS G: GAGE OPT
_L 0x1066608A 0x00000005
_C0 GRADIUS G: GAGE SPEED
_L 0x1066608A 0x00000001
_C0 Inf. Shild - Gradius 1
_L 0x203032C8 0x00051C02
_C0 Infinite Credits (Gradius Gaiden)
_L 0x0066648A 0x00000005
_C0 Infinite Credits (Gradius Gaiden)
_L 0x0066648A 0x00000005
_C0 Infinite Lives (Gradius Gaiden)
_L 0x00666080 0x00000007
_C0 Infinite Lives (Gradius Gaiden)
_L 0x00666080 0x00000007
_C0 Infinite Lives (Gradius II)
_L 0x005AB9A0 0x00000007
_C0 Infinite Lives (Gradius II)
_L 0x005AB9A0 0x00000007
_C0 Infinite Lives (Gradius II)
_L 0x005AB9A0 0x00000007
_C0 Infinite Lives (Gradius III)
_L 0x00801050 0x00000007
_C0 Infinite Lives (Gradius III)
_L 0x00801050 0x00000007
_C0 Infinite Lives (Gradius IV)
_L 0x005596C8 0x00000006
_C0 Infinite Lives (Gradius IV)
_L 0x005596C8 0x00000006
_C0 Infinite Lives (Gradius)
_L 0x00303372 0x00000007
_C0 Infinite Lives Gradius 1
_L 0x00303372 0x00000007
_C0 Infinite Lives Gradius 3
_L 0x00801050 0x00000007
_C0 Infinite Lives Gradius 4
_L 0x005596C8 0x00000007
_C1 Infinite Lives Gradius G
_L 0x00666080 0x00000007