After two months of soft resetting, I got a shiny Kyogre.
Immediatly after Kyogre, I went for shiny Anorith in four days. It's evolved.
A shiny Onix was the first thing I ran into in Victory Road in LG. It's evolved.
While searching for a Chansey with a Lucky Egg, I ran into a shiny female Nidoran and caught it. It's fully evolved.
While training my shiny Kyogre in Ruby, I caught a shiny Mawile in Sky Pillar.
In the Route west of Fushia, I was training an Ivysaur and caught a shiny Bellsprout there. It's fully evolved.
After seeing a shiny Poochyena while soft resetting for a shiny Treecko, I gave up. Eventually, I decided to try again for Mudkip and got it. It's fully evolved.
I randomly decided to go for a shiny Magikarp in LG. I broke out my Old Rod, spent a couple days fishing, and eventually caught one. It's evolved.
Two years ago, I went after shiny Eevee, but gave up because I wanted to continue LG. About a month ago, I decided to go for it again and soon got it. I chose to evolve it to Vaporeon, since I can't trade from LG to R/S for some reason.
While stealing mushrooms off Paras in Mt. Moon, the last one I found was shiny. It's evolved.
I randomly decided to go for shiny Porygon. I soft resetted for about a week, but I got it. It's evolved.
Really, though, aren't there a hundred threads on this?
EDIT:Oh, and my shiny Armaldo is especially special. Four out of six of its IVs are flawless, the two that aren't flawless being Defense at around 26 (not bad) and Special Attack at 11 (bad, but Armaldo doesn't need to use its Special Attack anyway).
i have a Shiny Rydon and Beedrill. The shiny weedle was of course found right at the start of the game so i ditched my started and used it all the way threw the game and even threw the E4. (well thanks to full restores).
A shiny Linoone (hasty nature), A shiny Zigzagoon (I'm never evolving it) a shiny Mightyena and 4 shiny Smeargles, 3 of which don't count 'cause they're clones.
Altaria ~ I went to Fallarbor Town and re-taught my Hitmonlee Rolling Kick because I wanted to see what the animation looked like. So I went into Route 114 and the first Pokemon I encountered (which took a while) was a shiny Swablu!
Exploud ~ Bumped into a shiny Loudred in Victory Road.
Magcargo ~ Bumped into a shiny Slugma in Fiery Path.
Magneton ~ Bumped into a shiny Magneton in Cerulean Cave (the entrance area right before you have to Surf).
Nidoqueen ~ While looking for a Chansey with a Lucky Egg, I found a shiny Nidorina! Caught with the first Safari Ball (phew!)
Manectric ~ Bought it from my cousin.
Meowth ~ Found a shiny Meowth on Route 6. Unfortunately, I didn't have any balls left so I Earthquaked it with Nidoking.