The Masuda method involves breeding two Pokémon created in games of different languages. An Egg resulting from such a pairing will have a higher likelihood of being Shiny. The most common way to arrange such a pairing is to use one foreign Pokémon and one from the game in which the breeding occurs, although the method will work in any game provided at least one of the Pokémon in the pair is from a language different to the language the game is being played in.
If both Pokémon are foreign to the language the game is being played in but are both of the same language, then the Masuda method will not take effect.
