dog: girl: wizard: asterix
To The Swiss Frontier(Act 5)
asterix: obelix: dog: wizard
To The Mountains(Act 7)
dog: chief: girl: wizard
To Piraeus(Act 9)
girl: chief: obelix: dog
To Olympia(Act 11)
girl: dog: chief: wizard
To The Desert(Act 13)
dog: girl: wizard: chief
To The Desert Camp(Act 15)
asterix: obelix: dog: chief
To The Pirate Ship(Act 17)
girl: asterix: dog: obelix
To The Roman Camp(Act 19)
girl: chief: dog: obelix
The last level is The Bull Fight(Act 20) and you have to get through The Roman Camp to get to the Bullfight....
I think these passwords will also work in any other system of the same game......(play station, etc..)