During a match, you can quickly increase your Smackdown Meter
until it is full, by pressing Taunt. If your SmackDown meter is
almost empty, you will have to repeat this a few times. After
every taunt, you will see your meter grow a percentage until it is
full. Note: When performing a taunt, it leaves you open for your
opponent to attack. This is best performed while they are either
groggy or on the opposite side of the arena.
Press Up, Up, Down, Down, Left, Right, Left, Right, Y, Y, X at the
main menu. A message will confirm correct code entry. After
enabling the code, go to the options screen and save your options.
This will keep all wrestlers unlocked if you start your game over.