Cheat mode:
During the bounce up during a game, hold Up + Select + X then release Select, 
Up, X (in that order). Replace X with Triangle, Circle, or Square for different 
cheats.

Change player names:
Press Start at the main menu, then hold every other button at the same time. A 
new screen will appear, where you can select the team and then the player that 
you wish to have his name changed.

Easy wins:
Select Brisbane at the Gabba against any other team under the easy difficulty 
setting and you will be unbeatable. 

Reserves:
If a player has retired during the last season, there are 10 or more reserves you 
can put in to replace the retired players(s).