These cheats work at the versus screen.

• Unlimited Turbo: SQUARE, SQUARE, SQUARE, SQUARE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, CIRCLE, CIRCLE, DOWN
• Softball Mode: SQUARE, SQUARE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, DOWN.
• Ball Is Rubber: SQUARE, SQUARE, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, UP.
• Max Out Speed: CIRCLE, CIRCLE, CIRCLE, LEFT.
• More Time After Each Play: SQUARE, TRIANGLE, TRIANGLE, CIRCLE, CIRCLE, CIRCLE, LEFT.
• Big Heads: SQUARE, SQUARE, RIGHT.
• Tiny Heads: SQUARE, SQUARE, LEFT.
• Max Out Batting: SQUARE, SQUARE, SQUARE, LEFT.
• Max Out Power: TRIANGLE, TRIANGLE, TRIANGLE, LEFT.

At the Title Screen or the Main Menu press TRIANGLE, SQUARE, R1 to unlock all Fantasy Teams and Fantasy Stadiums.

You must hit 10 home runs in a game.