PS2 Black Market Bowling Cheats

[Lawrence]

Center custom bowling balls:
Win a shootout in day mode for each center

Graveyard center and Zombies:
Unlock all Night Mode centers and beat all the Night Mode challanges

New outfits for bowlers:
Win a night mode shootout game to unlock 1 of 3 extra outfits per bowler

Night Mode for any center:
Win a matchplay in a center in Day Mode

Player bowling balls:
Beat a bowler in challange mode to use his or her ball with another character

Professional bowlers:
Beat a bowler in his or her center in challange mode

Super custom bowling balls:
win in a matchplay game in night mode for each center

Source