Cheat Mode:
At the start of the game go to options, then go to passwords and submit any of
the following codes.

Code           Effect  
ALL_BOBO       All Bobo teams   
ROCKETMAN      Ball carrier has speed bursts   
LINE_BUSTER    Better defense line   
STICKEM        Better receivers   
SUPER_FOOT     Better running back   
TINY           Big players  
FASHION_SHOW   Cheerleaders pictures after game   
SMARTER_CPU    CPU team is more difficult   
JACKHAMMER     Crunch time with more hits   
BOOSTER        Fast Players   
TWO_D          Flat players   
POP_WARNER     Floating players   
GRUDGE_MATCH   GameDay stadium   
HAM INJURY     Hamstring injury when player tries to run  
ENDURANCE      High endurance   
BIG_PIG        Large football   
GIANTS         Large players   
PENCILS        Tall and skinny players   
MUNCHKINS      Small players   
FLAT_LAND      Flat players   
989_SPORTS     Players named after 989 Sports programmers  
EURO_LEAGUE    Players named after European league stars  
BASKETBALL     Players named after NBA stars   
RED_ZONE       Players named after Redzone programmers  
OVAL_OFFICE    Players named after U.S. Presidents   
FATIGUE        Reduce fatigue   
EVEN_STEVEN    Evenly matched teams   
UNBEATABLE     Unbeatable team   
CREDITS        View credits   
5280_CLUB      Mile High Stadium   
  

Thanks to Revolution reader David D.!