Interesting, the episode 18 is by far... the most ordinare of them all. I dunno, my least beloved episode. There's 5 top things (among others) why it isn't one of my faves:
1~ Where the fuck are Fluttershy and Pinkie Pie? My 2 fave ponies?
2~ Why isn't there any mail that Twilight Sparkle writes to Celestia Like in all other episodes?
3~ Cutie mark crusaders are not as good as the adult ponies.
4~ "My little ponies" is said 2 times, just to remind us wtf we're watching...
5~ I don't remember one good joke from the whole episode.
It's kind of a downfall compared to the rest, and looked more like a side project instead of an actual episode. I hope they'll make the next episode base on at least 1 adult pony, and I hope it'll either be Twilight Sparkle, Pinkie Pie or Fluttershy, but I think Fluttershy won't be the main person, since the fore-last episode was about her... and the Cutie Mark Crusaders.
BTW here're the 2 parts that I watched. Nevermind the first not fitting the screen. About 5 mins in the episode, it is fixed.