My Little Pony" crazed 5-year-old had to see this in cinemas and no other than yours truly had to follow her. It will not change a single non-believer into being fans as it follow the same pattern as the series and could easily have been a three-parter on the show. . I did sleep for a scene or two, but my girl was happy and it is hard not to get happy by the colors and the very big-eyed ponies. For fans only.
From what I've read, the appeal of "My Little Pony," for the older, male crowd at least, is a result of the current spinoff dealing with themes of social awkwardness and anxiety. Sadly, you don't get any of that relevance in the film, nor does it introduce you the myriad of color-vomit characters over 100 overlong minutes. It might be a fine introduction to moviegoing for young kids and good for fans. That's about it