On main menu press these combinations to activate the relative cheats:

Left, right, left, right, (X), (Y), down = Big Hands

Left, right, left, right,X, Y, right = Big Heads

Left, right, left, right, Y, X, down = "Granny Shot"

Left, right, left, right, X, X, X, right = Hidden Teams

Left, right, left, right, Y, X, right = Invisible Players

Left, right, left, right, X, Y, left = Little Players

-left, right, left, right, X, Y, up = Little Heads