Well since you want it to be either Rash/Naive, I'll just catch a fresh one in either Black or White, I can RNG abuse it for shininess as well. Before I go after Latios tomorrow, do you want him to be shiny as well?
Also, one more thing, you aren't planning to use these for Battle Spot, are you? Because since they won't have the Pentagon, you wouldn't be able to use them on there.
Also, one more thing, you aren't planning to use these for Battle Spot, are you? Because since they won't have the Pentagon, you wouldn't be able to use them on there.