The following are known Action Replay Codes for Maken X on SEGA Dreamcast (Dreamcast). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark

No Clipping Mode
5C5776C7
00000001

Enemy Move Mode
FA999716
00000001

Narrow Character
5ABF76C7
00003F80

Giant Character
FCA19716
000041A8

Super Jump
85B38C90
0000001E

Homing Attack
81B38C90
00000001

Wide Character
5ABF76C7
000041A8

Super-Duper Jump
85B38C90
0000003C

Tiny Character
FCA19716
00003F80

High Jump
85B38C90
0000000F

Debug Display
A43353A2
00000001

Infinite Health
FDD99716
00000100

God Mode
FA499716
00000001