This code enables three hidden teams with players from Left Field and Nintendo's testing and development departments. Hold the L Button when selecting Pre-Season from the Main Menu. Cycle through the teams to find the three hidden ones.

At the front end, press TOP C, BOTTOM C, LEFT C, RIGHT C, Start, Start, A, B, A, R, Z then select the Left Field Team.

First complete the Hidden Team code: on the main menu, highlight Preseason, hold L and press A. Then go back to the main menu and press top C, bottom C, left C, right C, Start, Start, A, B, A, R and Z. Then select the Left Fielders and begin your game.

After you start a game, pause and enter the following controller commands: A, C-Up, Control Pad Down, Control Pad Up, C-Down, R, R, B, C-Right, C-Right, Z. Get ready for the light show!

Note: You will go into instant replay mode as you enter this code-- this is supposed to happen.

On the main menu, press right C, right C, B, R, R, bottom C, Up, Down, top C, A and Z.

During a game, press Start to pause. Press Right on the Control Pad twice, Left on the Control Pad, R Button, Z Button, Start, A Button, Start, A Button, Start.