Gameshark codes:

P1, No LP  
9100c7c5
9100c8c5 

P1, Unlimited LP  
9199c7c5
9199c8c5  

P2, No LP  
9100cac5
9100cbc5 

P2, Unlimited LP  
9199cac5
9199cbc5  

Weak opponent  
9100cac5
9100cbc5