If your stuck on the 35 yrd line and don't think you can make the field goal press B to change players and the computer kicks for you. Very effective on the onside kick In one game I tried onside for every kick off recovered 4 out of 5. Not a code but I thought it would help someone
Go to the codes option and put in the name TURBO for a new turbo selection under Game Speed menu.
Onside Kick Recovery (hint)
When kicking off, point the arrow all the way low to the ground and in the direction of the opposing player that is directlt in front of the kicker. Kick the ball straight and a little more than 3/4 the way up the power meter... This will enable you to recover 50% or more of the time...
Type in SUPERSTARS to unlock the SegaSports Team!!!
Extra Attribute Points
When creating a player, at the attributes screen take all of your points down to zero. Now put them back how you would like them. If done properly you should have 10-11 extra points. (Note: If you put your points up to 100 you will lose 2 points.)
Longer Kick-Off Returns
Select onside return from the playbook. When kicker raises his hand, wait 2 seconds and press Y and then B. Return right for extra yards. This is not a code but I thought it might help someone out.
Change Text Appearance
Go to the codes option and put in the name SCRAWL for a new text appearance,
Change Announcer's Voice
Go to the codes option and put in the name SQUEEKY for a new announcer voice.
Go to the codes option and put in the name LARD for fat players.
Go to the codes option and put in the name DEDMAN for slow motion.
If playing with more than one player, players 2-4 have trouble making their own selections such as picking teams or calling timeout. To fix this problem move with joystick first and press A after that you can use either pad or joystick.
A.I. pick your play
To have the system pick your best play you can do, press A 2 times at the play selection screen.
NOTE: It will show you what it is selecting by highlighting the play greyish.This works for both defense and offense.
Sack the Q.B. Every Time
In the options screen, disable penalties for offsides and neutral zone infraction, then start your game as normal. Now, when your on defense, you can line your defensive player up RIGHT BESIDE the quarter back! Guaranteed sack every time.