While playing with Griffey and while up to bat press Left Left Right Right Right Left Left on the DPad. Now just hit the ball.
Various Cheats
At the Create Player Name screen enter 'code' as the first h3 and for the last h3 enter any of the following "Names":
Name
Effect
liddleleague
Little Players
invisibleman
Invisible Men
bigfeet
Bigfeet
weebleman
Weeble Team
toothpick
Thin Team
bigghedz
Big Head Mode First Win World Series Rookie Setting
cpuvscpu
CPU vs. CPU Mode First Win World Series AllStar Setting
thetick
Tick Team First Win World Series Veteran Setting
emotions
Another Team
steamrolled
Flat Team
superhuman
Full Attributes
phattbatt
Big Bats
Submitted by: Dan SkinsRule01aol.com
Easy Double Play
When there is someone of first base press Right Left Right and the batter will hit it to second basemen for an easy double play.
Fly Mode
After fielding a ball run to any base other than first. Now throw the ball around the bases in this order: First Second Third Home Third Second Home First Second Third Home. On the next play press A to leap into the air then press A or B to "swim". Submitted by: LUVEMSLO LUVEMSLOaol.com
View CPU's Pitches
While batting press R on Controller Two.
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.
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.