I think I saw a shiny Rattatta in like FireRed, but of course it was BEFORE I had any Pokeballs...
I did finally get a 100% legit shiny in Black 2, a Vennipede. Who is now a level 100 Scolipede.
Besides that I got the Shiny Gyrados from SoulSilver, the Shiny Gible from beating Black Tower, and the Shiny Haxorous from the Nature Perserve.
Of course I don't have the Gyrados any more, since I long traded in the SoulSilver (I had transfered all the Pokemon off of that onto White, which I also traded in).
A guy at Pokemon TCG league gave me a shiny Eevee, which I turned into a shiny Espeon. A guy at work gave me a "hacked" shiny Legend of Palkia (which worked). --- Toho's Godzilla Will Live Forever Pokemon Black 2 FC: 1292 6448 6021
My first shiny was probably a hatched baby from breeding the red gyarados in gold but I don't remember which ones I breed exactly. My brother caught a shiny geodude with selfdestruct on my LG when I let him play it but that doesn't count either.
My first shiny was a HG Kyogre I found when I was soft resting for a good modest one. --- "In truth, they haven't been allowed for ages, we've just never enforced the rule" -SineNomine on presigs
I can't remember which came first. Both were in Pokemon Silver.
One of them was visiting the first major cave you have to go through. Gold geodude. I caught him and named him Nugget.
The other one I actually used, and was a shiny crabby which I evolved into Kingler. He was an absolute BEAST, i think he had flawless IVs or something. I got the crabby from fishing in the little lake below Goldenrod in the backyard of the Day Care for lols. --- (On Resident Evil Revelations) "4/10. The campaign was great, but the originality to Raid was stolen from Pokemon..." -CPU-Z
Noctowl. Totally random, I didn't even know about shinies before and failed to notice the shiny sparks. Still caught it, because I wanted a Noctowl anyway. Took me 2 weeks to figure out what the hell was wrong with it. --- "Evil, beware. We have waffles..." - Raven, Teen Titans