Slam 'N Jam '97
Shot Percentage: Start a game in any mode. Then, after the second "Scouting Report" screen, press and hold L1. Keep the button held until the tip off. Right at the top-off, press Start to pause the game. While the game is paused, release L1. Then press Start to unpause the game. Now, whenever you take a shot, you are shown the percentage chance it has of going in.
Small Players: To play the game with small players, start a game in any mode. Then, after the second "Scouting Report" screen, rapidly press R1 until the tip-off. Right at the tip-off, press Start to pause the game, then press Start again to unpause it. All the players are now pint-sized.