Super All-Star difficulty:
Enter the game options menu and highlight the difficulty selection. Press L1, R1, L2, R2. The "Super All-Star Difficulty" selection will appear.

Perfect players:
Hold Left + Square + Circle + Select at the player rating screen to create players with 100% in each stat.

All-Star teams:
Select exhibition mode. Press R1(2), R2(2), L1, L2, L1, L2 at the team selection screen. An "All-Star" option will appear, allowing the 94/95 or 95/96 All-Star teams to be accessed.

Extra options:
Press L1, X(2), L1, X, Square, R1, X, Square, R1, Circle at the options menu. Then, hold Up/Right + Triangle + Square. A new "Game Rules" selection with fouls, foul outs, backcourt, out of bounds, fatigue, three second clock, and other options will appear.