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.

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