Well, I was training my pokemon on route 104 today in Pokemon Sapphire, and had just caught a Wurmple. So I'm training and training and a special animation pops up (when you encounter a pokemon and the screen has these white bars that go across rather than the black and white flashing) and I'm like "Oh interesting."
It turned out to be this:
I almost fell out of my chair. It was the first Shiny I've ever encountered! So of course, as my rules stated, I could catch it. And now I have two worms on my team. Oh boy XD
This lovely girl is going to be a Beautifly! She just evolved!