Enter these codes at the versus screen.
More Time After Each Play: SQUARE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, CIRCLE, LEFT.
Big Heads: SQUARE, SQUARE, RIGHT.
Tiny Heads: SQUARE, SQUARE, LEFT.
Max Out Batting: SQUARE, SQUARE, SQUARE, LEFT.
Max Out Power: TRIANGLE, TRIANGLE, TRIANGLE, LEFT.
Unlimited Turbo: SQUARE, SQUARE, SQUARE, SQUARE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, CIRCLE, CIRCLE, DOWN
Softball Mode: SQUARE, SQUARE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, DOWN.
Ball Is Rubber: SQUARE, SQUARE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, UP.
Max Out Speed: CIRCLE, CIRCLE, CIRCLE, LEFT.