This trick will let you play either of two hidden teams.

On the Main Menu Screen, choose the ‘Start Game’ Option.

On the next screen, choose Exhibition and then hold the
X, Triangle, Square and Circle buttons until the next
screen loads in. Once the Team Select Screen appears, let
go of the buttons and scroll through the teams on the
first or second controller, and you’ll find that you can
choose two new teams; the Virgin
Blasters and the Rad Army. Both of these teams have a
high rating, so you will be sure to do well with either
one of them.