International Track And Field 2 Codes -

Play as Superman:
Press Up(2), Down(2), Left, Right, Left, Right, Circle + X at the event selection screen.

Mole:
In the Long Jump, match the last three numbers of your distance, such as "6.66". A mole will appear from the location of your jump.

Hint: Faster buttons:
To win easier on most events, use a marble when you have to quickly press the buttons.