These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: My Little Pony: Friendship Is Magic S1 E19 "A Dog and Pony Show"
Ass Pull: While it had been established as early as "Boast Busters" that Twilight Sparkle could perform many different spells whereas most unicorns can generally only do one, her ability to use Rarity's gem-finding spell had never been brought up or mentioned until Spike brings it up out of nowhere.