>The Masuda method involves breeding two Pokémon created in games of different countries.
You can use any foreign Pokemon for it to work. They can both be from a different country than yours as long as they aren't from the same one.
>If both Pokémon are foreign to the cartridge but are both from the same country, then the Masuda method will not take effect.
Source: knowledge and Bulbapedia
Hope I helped. :]