To get alternate team uniforms hold X + Circle + L2 when the "Just a Minute" sign appears. Keep the buttons held until several seconds after the sound of a puck is played. Teams will have different jerseys with injuries enabled when game play begins.
To get super players hold L1 + L2 + R1 + R2 when creating a new player to be able to set every stat to 40. A sound will confirm correct code entry.