the odds of hatching a shiny is 1 in 8200+ (cant remember the exact number off hand). if u want to do the Masuda method which is having a 1 in 2000 chance of getting a shiny, then u need a pokemon of a different language from ur game. getting a pokemon off the GTS doesnt guarantee of having a foreign pokemon. if u have platinum, if its a foreign pokemon, when u check the pokedex of said pokemon, there will be a foreign entry for it as well. hatching shinys is still a very long process in itself, Masuda method or not.