International Superstar Soccer 2
At the title screen, press Down, Right, Up, Left, A, B, Y, X, White, Black, Start + Back.
At the title screen, click Left Analog-stick(2), click Right Analog-stick(2), press L, R, Black, White, B, A, Back + Start.
Win the American Cup with Argentina to unlock the Argentina Legends team.
Win the American Cup with Brazil to unlock the Brazil Legends team.
Win the European Cup with England to unlock the England Legends team.
Win the European Cup with Holland to unlock the Holland Legends team.
Win the International Cup with an African team to unlock the African All-Stars team.
Win the International Cup with any American team to unlock the American All-Stars team.
Win the International Cup with any Asian team to unlock the Asian All-Stars team.
Win the International Cup with any European team to unlock the European All-Stars team.
Unlock all the other All-Stars teams, then win International Cup with any team to unlock the World All-Stars team.