When you are actually playing the game, just enter the following codes: 
Renew Health: Up, Right, Square, Circle, Up, Down, Right, Left 

Renew Magic: Right, Right, Square, Circle, Up, Down, Right, Left 

View all Videos: Left, Right, Square, Circle, Up, Down, Right, Left 

Blood Forge Fun:
Take a person (yes, you've got to keep them alive & use mind control spell) to a blood forge. Sacrifice them instead of you. INSTANT 99 in whatever the blood forge makes! So far only tested on the IMPLODE forge with a guard right by it and using the secret entrance in the town of Steinchenchroe (house west of north gate, center room, move chair in middle of room). 

  

Game Shark Codes
801CAA7A 0059 - Infinite Magic
801CAA74 0059 - Infinite Blood