I just caught that one. Something tells me that episode gets the reception of "Oh yeah, we have a sense of humor about ourselves. And to show you how good that humor is, it's only going to air ONCE!" from Disney. You know, I was worried about them showing St. Olga's School this soon in the series, but if it means we'll get an actual villain that's a credible threat (no offense to easily beaten, not that serious Ludo), this will work out wonderfully for the show.
Plus, it doesn't exactly mean the school's not going to get rebuilt. This is one of those "you won the battle, but the war is still coming" deals. Very exciting, and all cartoons need a wham episode like this that changes the game.
And for some reason, brainwashed Ponyhead somehow reminded me of Mr. Sparkle.
Maybe the sparkly, yet dead eyes and the frozen on smile?