Got the Shiny Charm recently so decided to try MM'ing some Shinies.
Hatched 690 eggs, got 4 shinies.
Shinies at egg #220, #290, #320 and #690. Will continue with Karrablast since all 3 had normal Abilities, first was Bouffalant.
Update: 18th Jan 2014
5 Shinies at 1455 eggs, updated excel sheet with my data.
Update: 20th Jan 2014
6 Shinies at 1720 eggs, updated excel sheet.
Update: 21st Jan 2014
6 Shinies at 2010 eggs, updated excel sheet.
Update: 22st Jan 2014
7 Shinies at 2290 eggs, updated excel sheet.
Update: 28th Jan 2014
7 Shinies, 2804 eggs, updated excel sheet.
Update 29th Jan 2014
9 Shinies, 3049 eggs, updated excel sheet.