Cheaty

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.