Big bats:
Create a player with the name CODE PHATTBATT.
Flat team:
Create a player with the name CODE STEAMROLLED.
Big feet:
Create a player with the name CODE BIGFEET.
Invisible team:
Create a player with the name CODE INVISIBLEMAN.
Thin team:
Create a player with the name CODE TOOTHPICK.
Big head mode:
Win the World Series under the rookie difficulty setting. Then, create a player with the name CODE BIGGHEDZ.
CPU vs. CPU mode:
Win the World Series under the all-star difficulty setting. Then, create a player with the name CODE CPUVSCPU.
Tick team:
Win the World Series under the veteran difficulty setting. Then, create a player with the name CODE THETICK.
Small team:
Create a player with the name CODE LIDDLELEAGUE.
Weeble team:
Create a player with the name CODE WEEBLEMAN.
Secret teams:
Create a player with the name CODE EMOTIONS.
CPU pitches:
While batting, press R on controller 2.
Exploding batter:
Quickly press Right, Left, Down, Right, Left, Up, Right, Left, Down while batting.
Fireworks:
In exhibition mode, press Z at the stadium selection screen to enter "View Stadium" mode. Then, press R + Z.
Flying Player:
When your opponent hits a pop-fly to the outfield don't catch it. Instead pick it up and run it in by holding Z and C-up. Then press C-Right, C-Up, C-Left, C-Down, C-Left, C-Up, C-Down, C-Right, C-Up, C-Left, C-Down. On the next hit don't pick it up, instead repeatedly tap A or B.
Automatic home run:
Wait until you are controlling Ken Griffey Jr. at bat. Press Left, Left, Right, Right, Right Left, Left. Successfully hit the ball for a home run.
Play as Team Nintendo or Team Angel Studios:
To play as Team Nintendo or Team Angel Studios, first you have to win the World Series with any team you want. Then, once you win, play an exhibition game and the two new teams should be under the two all-star teams
Angels in the Outfield:
On a pop fly to the outfield, allow the ball to drop then hold Z and press C-Up to run to second. When you reach second base, 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 to various bases. The crowd should boo if the code worked. On the next ball into the outfield, ignore the ball and run and press either A or B and you should takeoff.
Going Nowhere Fast:
When batting, bunt the ball to the pitcher, not the catcher. Then, with the pitcher, dive twice and on the second dive grab the ball. When he stands up, he should walk in circles forever.