Correst me if i'm wrong, but based on what I read in this article, the answer to your question would be "highly unlikely" The reason I say that is because when you soft reset, you're also resetting the loop. Also, The shiny Pokémon show up at 8 random numbers out of 65536, or 1 out of every 8192. But since that number also affects the IVs of a Pokémon, then that means that if it's shiny, it has one of eight sets of IVs, which are most likely similar, or have IVs that cross over witht eh same amount, so like I said, it's possible, but highly unlikely.