Konami Man
Did you know that you can get the Konami Man to appear in some of the events? Well you can and the classic Konami code to make it work will also change the appearance of the female athletes. To enter the cheat go to the Events Selection screen and press UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, CIRCLE, X. If you enter it correctly you will hear a sound effect.

Alternate female athletes
At the events selection screen, press Up(2), Down(2), Left, Right, Left, Right, Circle, X to change the appearance of the female athletes and have the Konami Man appear in certain events. If you entered the code correctly, you will hear a sound.

Blimp
Finish the 100 meter dash with a time that has the same number in the last and second to last place.

Mole
Finish the long jump with a distance that has the same number in all three places.

Space Shuttle
On javalin throw put turbo on and run at full speed ( if you can run full speed without turbo) and throw the javalin at 70 degrees or higher and watch.