Enter the following codes at the Cheat Code screen:
989 SPORTS: Players will have the names of the crew over at 989 Studios.
ALL BOBO: All the players will have the last name "Bobo".
BASKETBALL: Players will be named after superstars from the NBA.
BIG PIG: This code will make the football huge.
CREDITS: This will show the credits.
ENDURANCE: This will, as the name gives away, give your players more endurance.
EURO LEAGUE: Players will sport the names of NFL Europe players.
FASHION SHOW: After the game, pictures of the cheerleaders will be shown.
FATIGUE: This will lower the fatigue of your players.
GRUDGE MATCH: This code will unlock the GameDay stadium.
LINE BUSTER: This will make your defensive line better.
OVAL OFFICE: Players will be named after the former leaders of America.
PENCILS: This will make all the players tall and thin.
POP WARNER: Players will float over the field.
SUPER FOOT: Running backs are improved.
TINY: All players will become big and fat.