I believe they put Glimmy in the show because they wanted a pony like Shimmy to be Twilight’s student, but they didn’t want to have crossings over between the show and the EQG universe (the one in Shadow Play with the Sirens not counting because they had no dialogue).
@Mike
If it was any other more adult movie
||They would have kissed all alone under those Fireworks the way Twilight glances over at her then Tempest getting embarrassed, come on how can I take that any other way? ||