Play as Neco and Modoki:
Beat the game with Nox and Eve.

View Neco's demo:
Beat the game with any character, then hold Select + Start to restart.

Alternate character color:
At the character selection screen, hold Select on controller two and press X, Circle, Square,
Triangle, L1, L2, R1, or R2.

Extra levels:
Each time you beat the game under one of the three difficulty settings, two additional levels
become available, for a total of six new levels.

                             Game Shark Codes

     Infinite Health P1 - 8006E176 00C8 
     Infinite Health P2 - 8006EDDE 00C8