Talk:The One Where Pinkie Pie Knows/@comment-27754788-20151017232444/@comment-1031724-20151018045519

It means an episode that doesn't revolve around some thing with a villain or more serious storyline. (like, most episodes that aren't two-parters or Twilight becoming an alicorn)

Example: Suited for Success, which is about Rarity making dresses for the other Mane 5, or Fall Weather Friends, which is about Applejack and Rainbow Dash competing in Iron Pony Competition and Running of the Leaves