Have you ever come across a shiny Pokemon (a Pokemon with a different than normal color) when playing a Pokemon game? If so, which ones have you caught?
Gen 3:
Gulpin - My first shiny. Just found it randomly one day on Route 110 while playing Emerald, and it got me so excited!
Snorlax - I decided to try soft resetting for a shiny on my Leaf Green version after seeing people do it on YouTube, and a shiny appeared after only about 20 soft resets (VERY lucky).
Gen 4:
I've gotten shiny Nincada, Ralts, Eevee, Pichu, and Ditto using the PokeRadar on my Diamond version. With Nincada, a shiny patch of grass appeared after a PokeRadar chain of 27, which is quite rare. I've evolved the Nincada into a Ninjask and Shedinja.
In addition to this, I've gotten Pokerus on two separate occasions, once on Emerald and once on Sapphire.