Controller Stress Test:
Enter the Skills mode screen. Hold X + Y and press Analog-stick Up + C-stick Down. The "Controller Stress Test" option will appear.

Noew enter the following codes at the Controller Stress Test screen:

Bonus Teams:
Left, Right, Left, Right, X, X, Right.You'll find three new teams in Arcade or Quick play modes.

Small players:
Left, Right, Left, Right, X, Y, Right.

Big Heads:
Left, Right, Left, Right, X, Y, Left.

Small Heads:
Left, Right, Left, Right, X, Y, Up.

Big Hands:
Left, Right, Left, Right, X, Y, Down..

Invisible Players:
Left, Right, Left, Right, Y, X, Right.

Weird Free Throws:
Left, Right, Left, Right, Y, X, Down.

Create the Ultimate NBA Player:
First create a player. Then release a player from the team you want your player to be in. Play arcade mode. Do lots of alley-oops with your created player. After the game ends you should get points for your created player.You get more points by doing those alley-oops.

Thanks to Revolution readers Goodtrainer, Marcus Frye and Paul C!