'Spike followed Pinkie Pie into the next room, expecting to find the pony distraught on the floor... whereas in fact she was merely changing into another, even sillier costume. On reflection, he wondered how he hadn't seen this coming.
"Oh, hey Spike!" Pinkie Pie chirped cheerily, turning around in something that had far too many frills. "Whatcha doin down here?"
"I could ask the same of you, but that isn't important right now," said Spike. "Since you like playing dress-up, I was wondering if you could let me borrow something of yours to disguise myself."
Pinkie gasped in a manner that would make most hyperventilate. "Is there a costume party somewhere around here?!"
"Uh... sure," said Spike, knowing that trying to explain things in full would take far longer than he had. "Can I look through your costumes?"
"Oh, sure, knock yourself out! Don't actually do that, though, that would kind of put a dampener on things. Although that reminds me of that time when we were swinging on the chandelier and..."
Spike trundled the rambling pony out of the door and locked it, just to make sure. A quick glance through the rack revealed something nicely local... a poncho topped by a red sombrero.'