Wear your opponant down to the point where the life bar blinks (Danger). After that, throw your opponant and he will fall twice.

To fight Jade during a one player game play until the match just before the question mark. Win one round using only the low kick button and the directional pad. If done correctly you will receive a messages and be transported to fight Jade. This ...

To fight Noob Saibot, play a two player game and win 25 matches in a row. If done correctly, you will get a message after the 25th win and be taken to fight Noob. After the match you will be returned to the pick your fighter screen.

To fight Smoke you must be in the Blue Portal. When you see the guy in the corner press Down + Start.

At the Options screen, select Done and press Left, Down, Right, Right, Down, Left, Left, Left, Left, Right, Right, Right. A new set of options will appear.