Pinkie Pie: I just know that my best Ponyville friends and my best sister friend are gonna become bestest friends!
Written by Noelle Benvenuti
The Mane Six have been summoned to Sugarcube Corner, very early in the morning, by an anxious Pinkie Pie, who wants them ready for a long session of rock candy testing. As they recover from the sugar overload, she explains that her older sister Maud is coming to spend a week in Ponyville before she leaves for school (she's working on her "rocktorate"), and that it is their tradition to exchange candy necklaces to celebrate their bond. Pinkie plays up Maud's good qualities, hoping that her best friends in Ponyville will become equally close to her favorite sister. Unfortunately, when Maud Pie joins them for an afternoon picnic, they find her to be quiet, reserved, and interested only in rocks. Pinkie obliviously chatters about how much fun it will be when all of them get together to make the candy necklaces, while the Mane Five wonder what to make of Maud's chilly demeanor.Each of the five attempts to bond with Maud over their shared interests: Rarity tries to design her a dress, Fluttershy shows her forest animals, Twilight looks up poetry, Applejack makes some apple cider, and Rainbow Dash challenges Maud to a rock-throwing contest. In every instance, Maud's cool and excessively literal-minded reactions stymie them. The Mane Five are forced to admit that they just don't feel any sort of connection to Maud at all, and they reluctantly inform Pinkie that they wouldn't feel right making best friend necklaces with someone who isn't their friend. Pinkie accepts this with obvious disappointment.Pinkie decides to find something all of them can enjoy together. She assembles her sister and friends in front of an obstacle course designed for everypony's interests, including a huge rock slide for Maud with a giant boulder at the top. Pinkie races through it to demonstrate, only to get her hoof caught in the rock slide. As she tries to pull free, the boulder comes loose and tumbles down on Pinkie. Maud abruptly comes alive. She dives through the course, crushes the boulder to rubble under her hooves, and escorts Pinkie safely back to earth. The Mane Five are beyond relieved to see her safe, but Maud tells Pinkie that she's decided to cut her trip short and spend the rest of her vacation at the Pie family rock farm. Pinkie races after her. It's then that Twilight realizes that the Mane Five and Maud do have something in common: their love for Pinkie.Maud and Pinkie return to the rock farm, where they find their friends waiting for them with enormous sacks of rock candy. Both sides apologize for trying to force a friendship, and Twilight explains that they should have just bonded over their shared affection for Pinkie Pie. Later, when Maud is boarding her train for school, everypony gives her a rock candy necklace and bids her goodbye. Pinkie immediately starts eating hers, but Maud quietly reveals to Twilight that she's never eaten any of her own. As she puts her newest necklace into a little box with all the others, she explains that she doesn't really like candy — but she does love Pinkie Pie, finally breaking into a smile.
A name like Maud doesn't quite belong with names such as Pinkie or Fluttershy. It may or may not be a pun on "mud pie", which is both a dessert and a possible commentary on Maud's personality (that is to say, she's as dull as mud).
Fan names for Pinkie's other two sisters are "Inkie" and "Blinkie". So we'd have Inkie, Blinkie, Pinkie, and Maud, similar to the old poem about Wynken, Blynken, and Nod, or the ghosts from Pac-Man: Inkie, Blinkie, Pinkie, and Clyde.
An Aesop: Sometimes two people just won't be able to connect because they're worlds apart, no matter how much they want to, but sharing a common friend can be enough to be friends.
Affectionate Gesture to the Head: Pinkie Pie gives one of these to Fluttershy in a rather condescending way, after telling the latter she couldn't give the secret ingredient to her rock candy away.
Character Shilling: Pinkie Pie's description of Maud to the other Mane Mares amounts to an In-Universe example of this, with Informed Attributes that Maud supposedly has in common with each of Pinkie's friends. While some of the traits are true (such as her Brutal Honesty), others are exaggerated heavily or in a completely different context.
Chaos Architecture: Pinkie's bedroom is on the first floor of Sugarcube Corner in this episode, instead of in the cupcake-shaped tower on the top floor as it normally is.
Maud's ludicrous strength as demonstrated during the pebble toss with Rainbow Dash comes in handy when saving Pinkie from a falling boulder. Consider that she also chews down on a rock crystal dropped from Rarity's hat without much effort.
Played for Laughs in the final scene, when the Mane Six give her the necklaces they've made. Rainbow's is a giant lightning bolt, so heavy that she can barely drag it and the tip scratches the train station platform, but Maud has no trouble staying upright once it's around her neck.
The Comically Serious: Maud is practically the hippomorphic ponification of this trope. She reacts to EVERYTHING with an indifferent expression, flat tone, and noncommittal attitude, whether it's just after saving her sister from an avalanche or explaining to the other ponies how she's not expressive like Pinkie is.
Didn't Think This Through: Pinkie tries to build an obstacle course containing her friends and sister's favorite things, ending with a rock slide for Maud, which nearly falls on her as she's demonstrating the course to her friends.
Pinkie's rock candy is literally made from rocks and lots of sugar.
Emotionless Girl: Maud Pie is a textbook example of the repressed variant. Even after rescuing her sister from a self-inflicted rock slide, her emotional state is betrayed only by her voice rising slightly in pitch and volume.
Expressive Mane: Pinkie's, as usual. Her mane and tail deflate slightly when her friends tell her that they haven't been able to relate to her sister.
Extreme Omnivore: Maud casually chews up and swallows a gemstone that accidentally got dropped into a muffin basket with no apparent ill-effects, only remarking that "It's crunchy."
Faux Horrific: Rainbow Dash's reaction when Maud says she isn't into competition.
Flat Joy: Maud Pie showing her enthusiam for everypony making best friend rock candy necklaces.
Maud Pie: Sure. (beat) Pinkie Pie: What's wrong? Rarity: Sorry, darling. I think we all just thought she'd be a bit more excited about this. Pinkie Pie: Are you kidding me? I've never seen her more excited in my entire life!
During the scene in Rarity's shop, when Pinkie hugs Maud for a split second you can see her grimace. For those who have siblings its easy to interpret as "I don't really enjoy this, but you're my sister and I love you so I tolerate it" type expression making it double as a Moment of Heartwarming.
At the picnic, Maud takes a few bites of her sandwich, and then sets it down, and pushes Boulder her pet rock at it. The scene briefly switches to closeups where AJ offers Maud a muffin, but by the time the shot pulls back, the sandwich is gone and Boulder is all alone on the picnic blanket.
Maud says that she and Pinkie show their emotions differently, while Pinkie cartwheels past her.
It's All About Me: Rainbow Dash makes a huge rock candy necklace shaped like her own cutie mark.
Leitmotif: Or should we say, lack thereof. Every time, Maud appears on screen, or even speaks, there is absolutely no background music. This is especially evident in her introduction, when all you hear is Tank's motors rotating.
Literal-Minded: Maud, in spades. For instance, after stating that she is only interested in expressing herself through fashion (as opposed to fashion in general), when Rarity asks her what her frock is saying, she points out that "It doesn't talk. It's a dress." Her literal-mindedness even compels her to put on the Pickelhaube and kneepads and run through the entire obstacle course the way Pinkie intended it to be run in order to rescue Pinkie, rather than go straight to the rock slide which was right in front of her. It's a good thing she was able to do all that at Super Speed.
Non-Indicative Name: Twilight gushes over a poet named Flourish Prose. "Prose" specifically means writing that isn't poetry.
No Social Skills: Maud doesn't seem very interested in making friends. She's mostly interested in rocks. She implies in the end that this isn't so much a lack of interest as having difficulty expressing her emotions to others.
No Smoking: In the poker arrangement in part of Pinkie's course, a rabbit is holding a carrot in his mouth like it is a cigar.
Sugar and Ice Personality: Maud. There are only three times in the whole episode when she expresses any emotion: a blink and you'll miss it look of worry when Pinkie first gets stuck in the rock pile, her determined expression when she rescues Pinkie, and later is her smile at the very end when she tells Twilight how much she loves her little sister.
Super Strength: Maud can toss and split boulders with her bare hooves, and it's likely Fluttershy isn't being metaphorical when she muses that Maud would move mountains for Pinkie.
Maud Pie: I don't know if you've noticed, but, I don't show my enthusiasm for things quite the same way my sister does.
Useless Protagonists: In a moment when Pinkie gets trapped in a mountain-pile of rocks and is in danger of a boulder falling and crushing her flat, the rest of the Mane Six do nothing but stand by and scream warnings to Pinkie. Granted, they do start running to save her alongside Maud — they simply stop because they're so dumbfounded by how much faster Maud is — but it's easy to miss, and one can't help but notice how they didn't try to save her sooner.