The following are known Action Replay Codes for Mystical Ninja Starring Goemon 2 on Nintendo 64 (N64).

Device Compatibility: Action Replay & GameShark

Infinite Money P1
80088ED7 00FF

Infinite Money Impact
801A2B4F 00C8

All Entry Passes
80088EC6 002C

Infinite Health Impact
811A2B52 01F4

Infinite Money P2
80088EE1 00FF

Infinite Health P1
80088ED4 0006

Infinite Health P2
80088EDE 0006