New Stadiums: [Submitted by:SNailB8ter]
At the main menu press L1, L2, Square, R2 R1, Circle, X. Now when entering the Stadium Select you can choose additional arenas.

Superstar Player: [Submitted by:SNailB8ter]
Enter the Roaster Menu from the main menu. Clear your "Create-A-Player" list until it is empty. Select edit player and use your R2 button to increase the stats of the player.

Strong pass: [Submitted by:SNailB8ter]
Play in one-on-one mode and press L2 + X to pass the ball quickly to your opponent.

Pass between the legs: [Submitted by:SNailB8ter]
Play in one-on-one mode and press R2 + to pass the ball between your legs to your opponent.

Rolling pass: [Submitted by:SNailB8ter]
Play in one-on-one mode and press R1 + X to pass the ball by rolling it to your opponent.

Hint: [Submitted by:JMan]
When playing in exhibition mode, once the game starts, press start, and go to the rules menu, and set all of the penalties to no, or the lowest possible, then you can just handcheck your opponent as soon as they pass it in.