When you get to the game select screen highlight two player contest and press down 5 times to get to music test and another 5 times to get to cheat mode. Once in cheat mode, press these buttons to activate the cheats:
Code | Effect |
Y, A, Select, A, Down, Left, A, Down | 50 Lives
|
B, A, Right, Right, A, Left, A, X | Hard Mode
|