My friend was getting me back into pokemon by letting me play platinum, and at one point I found a pink sneasel (I guess it was a shiny one), I didn't think anything of it, so I killed it. My friend flipped out on me when I told him about it later.
Another time on the same game, I had a shiny scizor on my team, but not knowing I had a shiny scyther before I evolved it (because it's just a darker green when it's shiny).
Another time on the same game, I had a shiny scizor on my team, but not knowing I had a shiny scyther before I evolved it (because it's just a darker green when it's shiny).