Mystery Quest Action Replay Codes (USA)

This page contains the Action Replay codes that I have available for Mystery Quest (USA), a game for the original NES (Nintendo Entertainment System). If you're playing on an emulator, you'll typically be able to put these codes into the program through a built in option. Anyone who is really old school and playing on a physical console will have to purchase a physical Action Replay device to use these codes.

When it comes to emulation for the NES you have 3 good options to choose from. You can do RetroArch, Nestopia or MesenCE, follow the links provided to learn more about how to use the codes you find on this page on the Emulator of your choice. If you don't see the code you want on this page, I recommend you return to my Mystery Quest Guides Index and choose a different section.

 

Always Have Key: 00CC:01

Always Have SOS: 00CD:01

Infinite Energy: 00BC:40

Infinite Vitality (Health): 00BC:41
Only enable this code once you're in the level

Quest Modifier: 010E:??
Set this to 03 when you finish the game, you will get the best ending.

Super Jump: 0046:F0

Title screen music modifier: 9B60:??:03

Vertical Axis: 030E:??
Replace ?? with a lower number to move up higher on the screen

Walk Through Enemies: 009B:10

 

Max Score P1
It won't be visible if you turn on the code in the middle of a level

011D:09
011C:09
011B:09
011A:09
0119:09
0118:09