Not sure if this has already been talked about, but I'd like to share something I found while rewatching the episode in one of the screenshots you see pinkie pie with her cutie mark. This is before she should have gotten it another one is without it directly after the scene where she has her cutie mark then the last one is the scene where she got her cutie mark just something to think about
PS. not sure if this is where I'm supposed to post stuff like this. Couldn't find a specific category