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