I havn't found any shinys so far, so I don't know if my concerns are groundless but I was thinking.
Would it be posible to edit the game so that you could choose the nature of a shiny if you find and capture it ?
I thought about this because I know its like 8000:1 chance (or something like that) of finding a shiny pokemon, but the chances of it to also have a good nature is much, much lower and I think shiny is rare enough as it is.
It would really suck to find a shiny and then have it be useless for competition because of its nature, and I think that if you do find a shiny you should be able to show it off as much as posible and nature shouldn't get in the way of that.
Anyway just an idea.