When it's your turn to bowl, press the following.

Code	Effect
Up, Up, Down, Down, L, R, L,R, B, A, B, A	All Domes Available.
R twice, L, R twice, L	Automatic Power Ups.
R, R, R, L, L, L	Clone Ball powerup.
L,L,R,R,A,B	Instant Win.
L, L, R, R, L, R	Mega Ball powerup.
R, R, L, L, R, L	Speed Ball powerup.
R, L, R, L, L, R	Turn the screen totally green.
L, L, L, R, R, R	White Dwarf Ball.