Game shark codes:

Master code "must be on"
AD1A19D18D99BA8A
68B9EE00BFA2A4E7  

Unlimited fight charges  
DBFA968D65313E1E
  
Unlimited HP  
8E390905C50236DD  

Unlimited magic  
E33B91086F1DBFC8  

Max Exp.
87013CE69996BEB0
6DB7C757F77C771E  

Max magic  
60830F231AD1B7C4