Various cheats

At the title screen enter the codes for these effects:

Big Heads:
     Down, Right, Up, Left, A, B, Y, X, White, Black, Start + Back

Flat players:
     Press Left Stick twice then press the Right Stick twice then
press L, R, Black, White, B, A, Back + Start


Unlock Hints

Unlock Europe Stars:
     Win International Cup with England, Spain, Portugal, Holland,
France, Germany, and Italy.

Unlock Africa Stars:
     Win International Cup with Cameroon, Nigeria, and South Africa.

Unlock Asia Stars:
     Win International Cup with Japan, South Korea, Australia, and
Iran.

Unlock America Stars:
     Win International Cup with Argentina, Brazil, Paraguay, Mexico,
and Chile.