The following codes are for the PS2 North American version. So may not work on other regions.
REGION: North America
Runs Score Modifier
1A76DE05 000000??
Activate Cheat Modifier
2A676267 000000??
Change the ?? for any two digits. The bigger the humber, the greater the effect.
All Runs Score For Away Team
2A98CC2A 24020000
All Runs Score For Home Team
2A98CC2A 24020002
All Movies
4AC85592 C4F83696
0B220B0C 00000000
1A217085 00000101
0A196670 00000001
Buck-Segregation
0A056670 0000000..