A lugia...from a trade...

The first one I found wasn an Elekid that is now an Electrivire...

My first was a red Abra in Silver. My second was from an egg at a nintendo event! It hatched into a red chikorita!!!

lateron i would get these shinys:
Tentacool
Gloom
Gastly
Eevee(trade)
zubat

First one seen-the first Pelipper I ever saw was pink. I only caught males back then so I ran away. Then I found out they were blue. >:(
First caught-Red Meditite I'm not gonna evolve ever.

The GTS in Diamond and Pearl made it easier for me to get shiny Pokemon. My first one off of it was a Pelipper. The only time I've run into a shiny in my game was while I was in the Safari Zone and I came across a shiny Wooper. Of course it ran away.

Shiny Typhlosion in Crystal.

A Shiny Oddish on Ruby and I got it about three years ago...

The first one that I've caught was a machop in Diamond, I think. That's the only one that I remember ever catching anyway. And I've been with pokemon since red and blue came out.  :(

A Kadabra (Grey.)