At the mode selection screen, highlight the "Quick Play" or "Arcade Play" options, then press C-Right + A. If you entered the code correctly, you will hear the sound of a basket. Then the Nintendo Gamers, Left Field Lefties, and Nintendo Plumbers teams will appear between the All-Star and Pacific division teams.
At the main menu, press C-Up + C-Down to display the cheat screen. If you entered the code correctly, the message "You have found the secret room. Press some buttons and see what happens" will appear. Then, enter one of the following codes at the cheat screen to activate the corresponding cheat function:
- Bonus teams
At the cheat screen, press C-Up(2), C-Down(2), C-Up(2), C-Down(2).
- Small players for home team
At the cheat screen, press C-Up, C-Down.
- Small players for away team
At the cheat screen, press C-Up, C-Right.
- Small players for both teams
At the cheat screen, press C-Up, C-Right, C-Down.
- Big heads for home team
At the cheat screen, press C-Up(2), C-Down.
- Big heads for away team
At the cheat screen, press C-Up(2), C-Down, C-Left, C-Right.
- Big heads for both teams
At the cheat screen, press C-Up(2), C-Down, C-Right, C-Down.
- Big heads for both teams; home team's heads bigger
At the cheat screen, press C-Up(2), C-Down, C-Right.
- Long necks
At the cheat screen, press C-Up(2), C-Down, C-Up, C-Down.
- Small players for home team
At the team selection screen, press C-Up(7). If you entered the code correctly, you will hear the sound of a bouncing ball. Then, press C-Down the indicated number of times to create a home team where every member is the same indicated player. To create a clone away team, press Z to display the team selection screen that features statistics before pressing C-Down.
| Player | Code |
| Kobe Bryant | C-Down(3) |
| Ken Griffey Jr. | C-Down(4) |
| Random NBA player | C-Down(5) |
| Minoru Arakawa (Nintendo) | C-Down(10) |
| Tim Bechtel (Nintendo) | C-Down(11) |
| Steve Bolender (Nintendo) | C-Down(12) |
| John Brandwood (Left Field) | C-Down(13) |
| David Bridgham (Nintendo) | C-Down(14) |
| Scott Bush (Left Field) | C-Down(15) |
| Marc Doyal (Nintendo) | C-Down(16) |
| Mike Fukuda (Nintendo) | C-Down(17) |
| Jeff Godfrey (Left Field) | C-Down(18) |
| Ken Griffey Jr. (Homerun Hero) | C-Down(19) |
| Roger Harrison (Nintendo) | C-Down(20) |
| Chick Hearn (Voice of the Lakers) | C-Down(21) |
| Robert Hemphill (Left Field) | C-Down(22) |
| Jim Holdeman (Nintendo) | C-Down(23) |
| Mike Knauer (Left Field) | C-Down(24) |
| Kevin Kraus (Nintendo) | C-Down(25) |
| Chris Lamb (Left Field) | C-Down(26) |
| Michael Lamp (Left Field) | C-Down(27) |
| Stu Lantz (Lakers Announcer) | C-Down(28) |
| Howard Lincoln (Nintendo) | C-Down(29) |
| Ken Lobb (Nintendo) | C-Down(30) |
| James Maxwell (Left Field) | C-Down(31) |
| Umrao Mayer (Left Field) | C-Down(32) |
| Arnie Myers (Nintendo) | C-Down(33) |
| Dan Owsen (Nintendo) | C-Down(34) |
| Colin Palmer (Nintendo) | C-Down(35) |
| Tom Prata (Nintendo) | C-Down(36) |
| Ed Ridgeway (Nintendo) | C-Down(37) |
| Henry Sterchi (Nintendo) | C-Down(38) |
| Noah Stein (Left Field) | C-Down(39) |
| Faran Thomason (Nintendo) | C-Down(40) |
| Gail Tilden (Nintendo) | C-Down(41) |
| Russell Truelove (Left Field) | C-Down(42) |
| Erich Waas (Nintendo) | C-Down(43) |
| Phil Watts (Left Field) | C-Down(44) |
| Armond Williams (Nintendo) | C-Down(45) |
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Game Shark Codes
Home Team Score Modifier
813FE3F8 ????
Home Team Fouls Modifier
813FE418 ????
Home Team Infinite Time Outs
803FE3F6 0007
Home Team No Time Outs
803FE3F6 0000
Home Team Infinite Turbo
81117452 00FF
81117AF6 00FF
8111819A 00FF
8111883E 00FF
81118EE2 00FF
Home Team No Turbo
81117452 0000
81117AF6 0000
8111819A 0000
8111883E 0000
81118EE2 0000
Away Team Score Modifier
813FD7C8 ????
Away Team Fouls Modifier
813FD7E8 ????
Away Team Infinite Time Outs
803FD7C6 0007
Away Team No Time Outs
803FD7C6 0000
Away Team Infinite Turbo
8111531E 00FF
811159C2 00FF
81116066 00FF
8111670A 00FF
81116DAE 00FF
Away Team No Turbo
8111531E 0000
811159C2 0000
81116066 0000
8111670A 0000
81116DAE 0000
No Shot Clock
81113176 02D0
Press GS Button For Time Modifier
8911318A ????
Quantity Digits to Accompany Time Modifier Code
0001 - 00.1
1518 - 3:00
2A30 - 6:00
