The variable nature of autumn makes it impossible for a dignified mare like Rarity to properly dress for the weather. Clearly the thing to do is altering the schedule through breaking into Rainbow's office. Isn't that right, Twilight?
When the Bearers race forth from Ponyville on an official mission, somepony has to take over on their day jobs. For Fluttershy, that's usually Snowflake. But he's not available today, so it's going to be a Sherman tank.
Are you a pony who travels? Do you need to communicate on the go? And do you totally lack any and all dragons in your life? Then you need -- Slate! Everypony does! Unless they can think. Which just might leave Trixie out.
The Cakes have inadvertently summoned an eldritch horror from beyond space and time to destroy the world. Again. Because they do it every year. And now Pinkie has to waste yet another night in battling against the tentacled results. (Stupid holiday.)
Rarity can (just barely) accept that Fluttershy would like to be a tree. The several hundred other ponies at the convention are giving her some trouble.