SZNXGUVV Balls do not count
SXOXYUVV Strikes do not count
The game only shows up to 2 strikes and 3 balls
PEOXGLZA 2 strikes and you're out
LEOXGLZA 4 strikes and you're out
AANZGLLA 1 ball and you walk
PANZGLLA 2 balls and you walk
ZANZGLLA 3 balls and you walk

The last two codes only work in 2-player mode
PANPUTAA + PEOETGAA Some batters start with count of 1 and 1
ZANPUTAA + ZEOETGAA Some batters start with count of 2 and 2