Enter these codes at the matchup screen. In the codes listed below, the first number refers to how many times to hit the B button, the second number corresponds to the A button and the third is for the R button. Then press the indicated direction to lock in the code. A message will appear to confirm code entry.

1920 Mode - 2, 4, 2, UP
All Fielders Run - 1, 3, 2, UP
Backwards Fielders - 4, 4, 4, RIGHT
Fireworks - 1, 4, 1, RIGHT
Ghost Fielders - 3, 1, 3, DOWN
Nuke Ball - 3, 4, 3, UP
Skull Ball - 3, 2, 3, LEFT