Activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Unlimited continues - Quickly press UP, DOWN, UP, DOWN, UP, DOWN, LEFT, RIGHT, LEFT at the character selection screen. The keyboard equivalent is W, S, W, S, W, S, A, D, A for player one.
Disco mode - Quickly press UP, DOWN, PK + SK at the character selection screen. The keyboard equivalent is W, D, J + L for player one.
Limb Boss - Quickly press UP + LEFT, UP, DOWN, DOWN + RIGHT at the character selection screen. The keyboard equivalent is W + A, W, S, S + D for player one.
Fight as Shrapp - Highlight Psyclopps and quickly press PK, PP, SK, PP at the character selection screen. The keyboard equivalent is J, I, L, I for player one.
Fight as Carnigore - Highlight Carnigore and quickly press SK, PP, PK at the character selection screen. The keyboard equivalent Is L, I, J for player one.