Press [Up], [L], [Up], [L], [Down], [L], [Down], [L], [Left], [R], [Right], [R], [Left], [R], [Right], [R], [B], [A], hold [Z] + [Start] at the title screen. The announcer will say "What an incredible comeback!" to confirm correct code entry. Choose the "All Stars" from the team selection screen to select the Euro Stars A, Euro Stars B, Asian Stars, African Stars, All American Stars and World Stars teams. These teams normally appear only after the game is defeated in league mode. Note: Only two additional teams are available in the Japanese version of the game.
Press [C-Up]x2, [C-Down]x2, [C-Left], [C-Right], [C-Left], [C-Right], [B], [A], hold [Z] + [Start] at the title screen. The announcer will say "Goal" to confirm correct code entry.
Rainbow:
When sprinting in any direction let go of everything and immediately tap "Chip".
Juggling:
Stand still and hold [C-Left].
Joot moves:
Keep tapping [C-Down] when running or standing still.
Rising kick:
Hold (Back) after the ball is kicked.
Sinking Kick:
Hold [Forward] after the ball is kicked.
You can shoulder charge the opponent's goalie right after he punts by pressing A+B. The ref will NOT call a red card or any penalty. Then if you get the ball back quickly enough just shoot to score easily. It helps if you can get the goalie far out in the goalie box so he cannot recover as fast.