| Game Title | System & Version |
| Castlevania | NES, US PRG1 |
| Contra III: The Alien Wars | SNES, US |
| Fester's Quest | NES, US |
| Final Fantasy IV | SNES, JP J2E v3.21 |
| Gradius III | SNES, US |
| Holy Diver | NES, JP |
| Mega Man X | SNES, US V1.1 |
| Ninja Gaiden | NES, US |
| Ninja Gaiden II | NES, US |
| Ninja Gaiden III | NES, US |
| Pokemon Blue&Red | GB, US |
| Star Wars Empire Strikes Back | NES, US |
| Teenage Mutant Ninja Turtles | NES, US |
| Top Gun | NES, US |
| Castlevania US PRG1 | Code |
| Don't fall backward when hit. |
AEKPYVPA |
| Don't lose life when hit. | ATSVPYST |
| Contra III: The Alien Wars | Code |
| 30
Lives Code. In the options
menu you will be able to set your Extra Lives count to 30. |
D784-A7D4 D087-AFA4 |
| Don't lose weapons when you die. | 64BA-64D1 64B8-64A1 |
| Gradius III US | Code |
| Use the
Up,Up,Down,Down,L,R,L,R,B,A full powerup code infinitely. |
D4A9-0D0D |
| Holy Diver JP | Code |
| Don't
take damage from objects.
Lava or other background features may still kill you. |
SXYYNE |
| Magic
use unlimited. |
AVGSSI |
| Ninja Gaiden US | Code |
| Level Select. This game has a hidden level select that can be accessed with this code. Hold A and use the dpad to change level. Press start to begin. | AZZTTI OTZTYS EGZVAI |
| Pokemon Blue (and maybe Red) US | Code |
| Walk through walls. Walk through whatever you want. Beware walking into undefined areas will crash the game. | 00C-23F-F7A |
| Reverse item loss. When you use or otherwise lose an item instead you gain an extra one. For example if you have a Masterball and Toss it or use it to capture something you will end up with both the one you used plus one more. If you toss an item, for every one you toss instead you gain. This can be used in combination with the following code. | 83E-86B-A24 |
| Item loss instead changes item type. Example: Use or toss 1x Pokeball and instead of losing 1x Pokeball the item slot that was Pokeballs will change by however much the count was to decrease by or to increase by if using the above code in combination with this. Be careful to know what item you want to transform into another. If you create an item that cannot be thrown away you may get stuck with it. So save before modifying anything and only save again afterwards if everything goes well. The easiest thing to do is to change Pokeballs into Masterballs. Item Numbers | 00E-75B-6E6 |
| Be able to Toss almost anything. If you through cheating have ended up with an item you cannot toss but don't want or shouldn't have you can enable these codes and it will override the check that prevents you from tossing "important" items like Oak's Parcel. | 937-6A9-A2C 007-6B9-D55 |
| Oak's Pokeball Modifiers. These codes change the Pokemon inside the 3 Pokeballs you can choose from at the beginning of the game. Replace xx with the number of the Pokemon species you want. The first code is the ball on the left, next the middle, and last is the ball on the right. Species Numbers | xx1-0EA-2A8 xx1-1FA-2AC xx1-30A-80C |
| Wild Pokemon Encounter Modifer. Using these codes and replacing xx with the species number of any Pokemon will force any wild pokemon encounter to be the chosen species. However their graphics during the battle will be glitched due to limitations of the Game Genie. The Pokemon will behave normally and can be captured and won't suffer any graphics problems once caught. Species Numbers | 3E8-ED8-4C1 xx8-EE8-A2C 008-EF8-D55 |