DDC9-DD06 Start with 0 bombs instead of 3
D5C9-DD06 Start with 7 bombs
FDC9-DD06 Start with 10 bombs
49C9-DD06 Start with 25 bombs
9DC9-DD06 Start with 50 bombs
BBC9-DD06 Start with 99 bombs
DD65-AFAB Infinite bombs
DFBE-A4A8 Start with 2 ships
D5BE-A4A8 Start with 8 ships
FDBE-A4A8 Start with 11 ships
49BE-A4A8 Start with 26 ships
9DBE-A4A8 Start with 51 ships
59BE-A4A8 Start with 76 ships
BBBE-A4A8 Start with 100 ships
DD6D-07AC Infinite ships
DDCE-D4D6 Each bomb capsule worth 0
D4CE-D4D6 Each bomb capsule worth 2
D0CE-D4D6 Each bomb capsule worth 4
D1CE-D4D6 Each bomb capsule worth 6
CB68-D4AC + D168-D7DC Protection against enemy hits, and weapon level goes 
to 2 when hit
CB68-D4AC + D168-D7DC + D16A-D4DC Protection against enemy hits, and 
weapon level goes to 6 when hit
CB6A-0D0D + D46A-0D6D Start in area 2
CB6A-0D0D + D76A-0D6D Start in area 3
CB6A-0D0D + D06A-0D6D Start in area 4
CB6A-0D0D + D96A-0D6D Start in area 5
CB6A-0D0D + D16A-0D6D Start in area 6
CB6A-0D0D + D56A-0D6D Start in area 7
CB6A-0D0D + D66A-0D6D Start in area 8
CB6A-0D0D + DB6A-0D6D Start in area 9
CB6A-0D0D + DC6A-0D6D Start in area 10
CB6A-0D0D + D86A-0D6D Start in area 11
CB6A-0D0D + DA6A-0D6D Start in area 12
CBC4-0F06 + DDC4-0F66 All weapon capsules give you weapon type 1
CBC4-0F06 + DFC4-0F66 All weapon capsules give you weapon type 2
CBC4-0F06 + D4C4-0F66 All weapon capsules give you weapon type 3
CBC4-0F06 + D7C4-0F66 All weapon capsules give you weapon type 4
CBC4-0F06 + D0C4-0F66 All weapon capsules give you weapon type 5
CBC4-0F06 + D9C4-0F66 All weapon capsules give you weapon type 6
828E-AF6B Power shots (weapon type 6) last until you pick up another weapon 
or get hit (Normally, they last only for a couple of seconds)