Change referee into a dog
To change the referee into a hound dog, follow these instructions. Use controller two and press Up, Up, Down, Down, Left, Right, Left, Right, B, A. Do this on the ISS Deluxe title screen and watch the linesman and referee chase the ball.

All Stars
Press R, Up, Down, L, X, B, Left, Right, B, A on controller two at the title screen.

Dogs
Press Up x2, Down x2, Left, Right, Left, Right, B, A on controller two at the title screen.

Extra Skill Points
Enter edit players mode before each match and use all available skill points. Highlight the "Cancel" option and press Y for 200 additional skill points.