At the main menu, go to either Home or Visitor Team
(depending on what you want). Flip through the teams.
Go to All Madden but do not choose it! At the main
menu, at the same team (Home or Visitor), press B, 
Right, and Select at the same time. You should get 
Team Halestorm. Team Halestorm has all its players 
and categories at best (100%). If you press B, Right,
and Select again, you should get Da Funhouse. That 
team has all players and categories at good (50%).
That's all folks! 

These codes are only valid during exhibition play! 

by Christopher