Cheat mode:
Press B, Y, and X to change the icons in the first, second, and third boxes respectively at the match-up screen. The numbers in the following list indicate the number of times each button is pressed. After the icons have been changed, press the D-pad in the indicated direction to enable the code. For example, to enter 1-2-3 Left, press B, Y(2), X(3), Left.

Log bat	0-0-4 Up
Wiffle bat	0-0-4 Right
Mace bat	0-0-4 Left
Rubber ball	2-4-2 Up
Softball	2-4-2 Down
Maximum speed	0-0-3 Left
Maximum power	0-3-0 Left
Maximum batting	3-0-0 Left
Big heads	2-0-0 Right
Small heads	2-0-0 Left
Unlimited turbo	4-4-4 Down
Extra time after plays	1-2-3 Up
Tournament mode	1-1-1 Down
No fatigue	3-4-3 Up
No contact mode	4-3-3 Left
Rocket Park stadium	3-2-1 Up
Roman Coliseum stadium	3-3-3 Up
Monument stadium	3-3-3 Down
Pinto Team	2-1-0 Right
Horse Team	2-1-1 Right
Lion Team	2-2-0 Right
Eagle team	2-1-2 Right
Todd McFarlane team	2-2-2 Right
Terry Fitzgerald team	3-3-3 Right

Hint: More homeruns:
Enable the "Rubber ball" code for a better chance of hitting homeruns.

Hint: Less homeruns:
Enable the "Softball" code for less of a chance of hitting homeruns.

Hint: Easy ground balls and fly balls:
Throw a fastball low for a ground out or a fastball high for a fly out. This works about 90% of the time.