Start a pick-up game and enter an ID. Now hold L and enter one of the following when the "Enter codes now" message appears at the bottom of the screen:

Infinite turbo:
B, B, Y, Y.

Big heads:
X, B, B, X.

Small players:
Y, Y, X, B.

All courts:
B, Y, Y, B

All jerseys:
B, Y, X, X.

All quicks:
Y, X, Y, B.

All NBA legends:
B, Y, Y, X.

ABA ball:
X, B, X, B.

WNBA ball:
X, Y, Y, X.

Ball trails:
Y, Y, Y, B.

No display bars:
B, X, X, X.

Explosive rims:
X, X, X, Y.

No counters:
Y, Y, X, X.

Easy two pointers:
Y, X, B, Y.

Hard two pointers:
Y, B, X, Y.

Classic Michael Jordan:
B, Y, B, B.

St. Lunatics team:
B, Y, X, Y

Thanks to Revolution readers Kobeman and Phillip!