On the match-up screen, press B, Y and X the required amount of times to change the icons on the screen. Then press the D-Pad in the direction indicated to lock in the code. For instance, a code listed as 1-2-1 LEFT will require you to press B once, Y twice and X once, then press LEFT to lock in the code.

1, 1, 1, DOWN: Cheats Disabled

4, 4, 4, DOWN: Unlimited Turbo

2, 4, 2, DOWN: 16' Softball

0, 0, 4, RIGHT: Whiffle Bat

2, 0, 0, RIGHT: Big Head

0, 0, 4, UP: Log Bat

0, 0, 3, UP: Ice Bat

0, 0, 2, UP: Blade Bat

0, 0, 5, UP: Spike Bat

0, 0, 1, UP: Bone Bat

3, 3, 3, UP: Coliseum Stadium

3, 2, 1, UP: Rocket Park Stadium

3, 3, 3, DOWN: Monument Stadium

3, 2, 1, DOWN: Midway Park Stadium

3, 2, 1, RIGHT: Empire Park Stadium

3, 3, 3, LEFT: Forbidden City Stadium

3, 2, 1, LEFT: Atlantis Stadium

2, 4, 2, UP: Rubber Ball

0, 0, 4, LEFT: Mace Bat

2, 0, 0, LEFT: Tiny Head

3, 0, 0, LEFT: Max Batting

0, 3, 0, LEFT: Max Power

0, 0, 3, LEFT: Max Speed

2, 1, 0, RIGHT: Pinto Team

2, 1, 1, RIGHT: Horse Team

2, 1, 2, RIGHT: Eagle Team

2, 2, 0, RIGHT: Lion Team

3, 3, 3, RIGHT: Team Terry Fitzgerald

2, 2, 2, RIGHT: Team Todd McFarlane

1, 0, 3, DOWN: Dwarf Team

1, 1, 3, DOWN: Gladiator Team

1, 3, 3, DOWN: Bobble Head Team

1, 0, 2, DOWN: Dolphin Team

1, 1, 2, DOWN: Scorpion Team

1, 3, 2, DOWN: Rodeo Clown

1, 0, 1 DOWN: Little League

1, 1, 0, DOWN: Minotaur Team

2, 2, 2, DOWN: Olshan Team

2, 2, 2, UP: Rivera Team

2, 3, 2, DOWN: Napalitano Team

2, 1, 1, DOWN: Evil Clown Team

2, 3, 1, DOWN: Alien Team

2, 3, 3, DOWN: Casey Team

3, 0, 3, UP: Extended Time For Codes