NBA Live 99 (N64)

100 points:
Pause the game and press Right, L1, L2, Left, R2.

Turbo mode:
Pause the game and press Left, Right, R2, L2, R1.

Trick free throw:
Hold R while shooting a free throw.

Granny free throw:
Hold C-Left shooting a free throw.

Secret Teams:
Create a Custom Team and name it as one of the following:

Ea Europals
Hitmen Coders
Hitmen Earplugs
Hitmen Idlers
Hitmen Pixels
Hitmen Rebounds