Big baseball:
At the pause screen, press R1, R2, R1, R2, R1, R2.
Cannon ball:
At the pause screen, press L1, L2, L1, L2, L1, L2. If you entered the code
correctly, someone will say "Hey, throw 'em the tatter!". Unpause the game
and the ball cannon coordinates will be shown at the top of the screen.
Press Up and Down to increase and decrease the height. Press Left and Right
to move it to the left field or the right. Press Triangle and X to increase
and decrease the speed and strength of the cannon ball.