Game Genie Codes

You can use this with an emulator by going into the "Cheat" menu.

From Game Sages:

C2A5-44A2 Infinite energy
D98F-4F0C	Less charge time for Psycho Dash
D98B-4DDC	Less charge time for Dark Friar
F061-44DD	Start with a lot more energy
F065-4D0D	Start with 20 strength points
7465-4D0D	Start with 50 strength points
9D65-4D0D	Start with 80 strength points
D9AA-1F0B + E8A5-14AB	Super run left/right only
EAA7-1D6B + D0A3-446B	Super run up/down only
FD6B-47A3	Get 2x the energy from herbs
F66B-47A3	Get 3x the energy from herbs

From the Game Genie Codes Creators Club:

1069-44DD "BACKWARDS TEXT"
NOTE: may only be at the beginning when starting a new game.

1061-440D "WILL STARTS WITH 40 MAX AND PRESENT HP"

1765-4D0D "WILL STARTS WITH 99 STRENGTH"

DD8F-4F0C "NO WAITING TO CHARGE UP FOR PSYCHO DASH"