A shiny Bidoof.
Only other one I've seen in the wild was a Graveler which used Explosion on the first turn. I knew that had a possibility of occurring and considered using my Master Ball but decided against it. That was a mistake.
I also got a shiny Charmander from an egg, the father was my foreign language Ditto and the mother was my friend's Charizard. It laid another shiny Charmander egg about five minutes later.