Bonus teams
Highlight the "Pre-Season" option from the main menu. Then, hold L and press A. Press Right to access the Nintendo Gamers, Nintendo Plumbers, and Left Field Lefties teams.

Alien heads
At the main menu, press C-Up, C-Down, C-Left, C-Right, Start(2), A, B, A, R, Z. Press B to return to the main menu. Then, enable the "Bonus teams" code and select the "Left Field Lefties" team.

Small players
At the main menu, press C-Right(2), B, R, R, C-Down, Up, Down, C-Up, A, Z.

Big heads
Pause the game and press Right(2), Left, R, Z, Start, A, Start, A, Start, Z.

Disco mode
Pause the game and press A, C-Up, Down, Up, C-Down, R, R, B, C-Right, C-Right, Z.

Unlimited fouls
Intentionally foul out all the bench players on your team. Then the remaining players may get an unlimited number of fouls.

View replay
Pause the game and enter the preferences menu. Then, set the "Special cameras" option to "Replays". Now resume the game and press B + Z after scoring to view the replay of the basket.

Alternate replay angle
During a replay, hold B.

Micheal Jordan clone
Create a player First name: Michael, Last name: Jordan, Age: 35, Years pro: 13, Jersey Number: 23, Height: 6'6, Weight: 215, Position: Guard, Head: 7, and max all abilities. Then, save and release the roster player from the Bulls, and sign Michael Jordan.