Talk:Limestone Pie and Marble Pie/@comment-1416077-20151103182934/@comment-14703963-20151107054622

It's possible that Pinkie and Marble are Fraternal Twins, which would mean that they were both born on the same day, or just from the same pregnancy, but unlike Identical Twins they both look different, and since Pinkie is older than Marble by mere minutes, Marble could very well be Pinkie's younger twin sister that doesn't look exactly like her.