From the main menu, highlight Exhibition, then press all four C-Buttons repeatedly until you hear a beep. Now go to the All-Star teams and you'll find Nintendo and Angel Studios.
When Ken Griffey Jr. is up at bat, pause the game and press Left, Left, Right, Right, Right, Left, Left on the D-Pad. Unpause the game and Griffey will point his bat towards the outfield. If you hit the very next pitch it will be a home run.
Wait until a pop fly to the outfield is hit by your opponent. Allow the ball to drop, then pick it up. Hold Z and press C-Up to run into the infield with the ball. Then, press C-Right, C-Up, C-Left, C-Down, C-Left, C-Up, C-Down, C-Right, C-Up, C-Left, C-Down to throw the ball to various bases. If you entered the code correctly, the crowd will boo. Then, intentionally ignore the next ball that is hit into the outfield, and repeatedly tap A or B to fly.
Wait till you have runners at first and third. Hit the R button three times to make them take a big lead. When the pitcher throws the pitch, hit the C-Up button to make the runner on first steal second. If you did it right, the catcher will try to chase down the runner on third, who runs back to the base. This gives the stealing runner enough time to beat the throw with time to spare.
Batter Dance - At the pitch/bat screen, enter the following on the batter's Control Pad: Up, Up, Down, Left, Left, Right, Right, Left, Left, Down, Up, Up. The batter will boogie.
Pitcher Dance - At the pitch/bat screen, enter the following on the pitcher's Control Pad: Up, Up, Down, Left, Left, Right, Right, Left, Left, Down, Up, Up. Your hurler will throw some snazzy steps.
When Griffey is up to bat, if you hear him say "I'm Back", then wait for a good pitch. If you get one that is up in the strike zone and you hit it well, he will hit a home run almost every time. Be sure to not swing at a bad pitch if you hear him say this. Fastballs are best to hit.
When you are batting, press Right, Left, Up, Down, Right, Left, Up, Down, Right, Left, Up, Down on the D-Pad. Keep repeating this sequence until the batter explodes.
Enter an Exhibition and play against your buddy or computer (the code works better on your friends). Choose your pitch by pressing R. Pitch the ball and push your joystick in any direction. Hold it there and you will notice the pitch drifts.
In a exhibition game at team select to play ball then press all 4 C-Buttons repeatedly. This will change the color of the home team's uniform.
When you are playing the game and you are the away team, when you hit a home run wait until it shows your teammates cheering in the dugout. Press the A button and the player's jersey will change to the color of the home team's color for a short while. This will work in any mode except home run derby.
When the ball is about to be thrown for a pitch by the opposite team, press Start on your controller. Then press the B button to return back to the game. If done correctly, the pitcher's aimer will be inside your hit circle. This does not mean that the pitch will go directly down the center, the pitch may curve off from the center. This code just tells you where the ball will be aimed as the pitcher releases it.
While pitching, move the cursor anywhere inside the strike zone except in the middle and hold it there. Then press Z and C-Right at the same time. Let go of Z first, then C-Right. Both cursors should have disappeared.
When playing against the computer, you can see the status (pitch selection/fatigue level) of its pitcher by pressing R on Controller Two.
First choose to play an exhibition and then choose the teams. (The home team will be the one that wins the series.) When you come to pick ballpark screen, simultaneously press all four C-Buttons continuously until you hear a chime. Then press Z and sit back and watch the celebration.
To move the baseball on the title screen, hold Z and move the Analog Stick.
When you get into the "View Stadium" mode by pressing the Z button while choosing your stadium, you can shoot fire works by pressing the Z and R button at the same time. The fireworks shoot near home plate. This code works in every stadium.