Sports Illustrated for Kids Football [GBA]

Cheatcodes
Go to season play, go to the cheat code selection, and then enter each of these cheats to build a team of fictional players:

CIRCUIT FUN, BAMPLYR, TARGETSTAR, SIKPOWER, EBPLAYER, SIKSTAR, TOUCHDOWN, RZONESTAR, BESTBUYPWR

150 points for home team
Go to cheats and type in afrpdb

Raising Stats
After you play a game in season mode, go to the newspaper and press A, B, A, A. Then, choose to either raise your offense speed by one, your defense strength by one, or your special teams agility by one. This may be repeated as many times as needed.

All-Star players:
Start a season. Select the "Cheats" option at the seasons main menu. Enter one of the following codes to unlock an All-Star player to place on your team.

TOUCHDOWN
BAMPLYR
CIRCUITFUN
BESTBUYPWR
TARGETSTAR
EBPLAYER
SIKSTAR
RZONESTAR
SIKPOWER

MLB Teams
Start a season, and at the seasons menu, select Cheats and enter 'ILUVMLB'.

Faster defense in football
Hold [B] during a tackle to run faster.

Further hits in baseball
Hold [A] after hitting the ball to make it travel further.