Roach Coach trading card: 
Select the "Enter Secrets" option at the
main menu, then enter "ROACHCOACH".

Sedusa trading card: 
Select the "Enter Secrets" option at the 
main menu, then enter "SEDUSA".

Bubbles graphics & super attack: 
Select the "Enter Secrets" option at the 
main menu, then enter "BOOGIEMAN".

Buttercup graphics & super attack: 
Select the "Enter Secrets" option at the 
main menu, then enter "CHEMICALX".

Mayor graphics & super attack: 
Select the "Enter Secrets" option at the 
main menu, then enter "BROCCOLOID".

Infinite super attack: 
Select the "Enter Secrets" option at the 
main menu, then enter "GIRLPOWER".
  
Power-up: 
Select the "Enter Secrets" option at the 
main menu, then enter "EBWORLD".

Powerpuff Girls suburban home trading card: 
Select the "Enter Secrets" option at the 
main menu, then enter "TOWNSVILLE".