Cheat mode:
Select championship mode. Highlight the indicated character and press [Shift]. Enter the one of the following codes to unlock the corresponding character and round of the championships. 

Status
 Highlight
 Code
 
Jules in second round
 Tony 
 [Left] [Right] [Up] [Left] [Down] [Down] [Left] [Right] 
 
Jules in third round
 Sapphire 
 [Left] [Up] [Right] [Down] [Left] [Left] [Up] [Down] 
 
Samantha in second round
 Maeve 
 [Down] [Left] [Left] [Left] [Up] [Left] [Down] [Up] 
 
Samantha in third round
 Lorraine 
 [Up] [Left] [Down] [Right] [Right] [Right] [Right] [Left]