Call out the Goalkeeper  -  During normal play, press and hold down the Triangle button to call the goalkeeper out of his goal area to play the ball 

Extra Romania Team  -  Use Romania to finish the World Cup in hard mode and you would have a new Romanian Team with Golden Hair 

Secret Team (American Version)  -  The following code works for the American version of the game. At the main menu, highlight Exhibition Mode and press Up, Up, Down, Down, Left, Right, Left, Right, O, X. If done correctly you will hear applause. Then at the Choose Your Country menu, press and hold L1 and R1. A team called "Classic All Stars" will be available for using. 

Secret Team (Japanese Version)  -  The following code works for the Japanese version of the game. At the main menu, highlight Exhibition Mode and press Up, Up, Down, Down, Left, Right, Left, Right, X, O. If done correctly you will hear applause. Then at the Choose Your Country menu, press and hold L1 and R1. A team called "Classic All Stars" will be available for using. 

Shooting Tricks:-  

Banana Shoot:   Press Square for power and then press Cross then Circle then the direction you want the ball to turn, e.g. In corner kick, press square 3/4 power cross, circle, press Left/Right.

Small Curve:  Use it only when you're 1 on 1 with the goalkeeper. When you see the goalkeeper run toward your player, tap Square then quickly press L1. Guaranteed 99% goal if you do it at the right time.