Yayifications! Hatched a shiny Skarmory in 632 eggs. I already have one- a French one off the GTS, but I wanted one I could put to use in the PWT.
It's my best bred Shiny yet- female with Impish nature, Sturdy ability (thankfully not Keen Eye), outstanding potential and max IVs in HP, Def, and Sp Def. It took quite a lot of setup time to make. I started off SR'ing a DW Skarmory for Impish nature, then bred it to get rid of the DW ability (Light Metal, really?) Bred it against a Ditto with Max. Def IV, then bred until I lucked out and got both max Def and Sp. Def. Then I got a Japanese Starly off the GTS (so I could breed Whirlwind as an egg move) with max Attack and Speed. I MM'ed until I got an excellent female, then got another Starly with max Def, the IV I absolutely needed. A couple hundred more eggs later, and I got my Skarmory.
I'm going to EV train it on Yamasks, and hopefully get a RE shiny. I'm not sure what I will breed after this.
To whoever was struggling with the PWT (Gustavo, I think), I recommend breeding some defensive pokemon - high stats, status inflicters, healers, stat boosters, whatever works. I've been working on defensive shinies on and off.