nope. sorry. it stays the same.
> The Masuda method is possible because
> of an internal marker on each Pokémon
> which identifies their "home
> location", 0x17. If the game
> recognizes the two Pokémon in the
> daycare as having different home
> locations, then the chances of the egg
> hatching into a Shiny Pokémon will
> increase. In Pokémon Diamond, Pearl,
> Platinum, HeartGold, and SoulSilver,
> the odds will be increased by four
> times: from the usual 1/8192 to
> 1/2048. In Pokémon Black and White,
> the odds were increased again, to
> 1/1366. This is six times as likely as
> encountering a Shiny Pokémon in tall
> grass.
here is a link to this full bulbapedia article