"Inexpliciable off-screen BS"
You have an entire race of shapeshifters who have the ability to look like anyone and can transform into objects.
Not only that but the episode you praise so much literally has inexplicable off-screen BS because THATS HOW THEY GOT CADANCE.
You don't have high standards. You don't know good writing. And apparently you lack imagination and common sense because that's all it would've taken to figure out how they got the Mane 6.
You're entitled and just whining because things don't go your way.