Well, I suppose that, in a sense, Pokémon such as the starter Pokémon (Mudkip, Bulbasaur, etc...) and ones that are stationary (Kecleon and Snorlax) are easier to obtain, because you only have to save in front of them and continuely soft-reset until they're shiny (opposed to just randomly walking around in the wild). Although, the theoretical probability is still 1/8192, and it would still be very time consuming... :\