Mrs. Twombly decides to spend the day brushing and spraying The Littlest Pet Shop until it's free of dirt and dust. In the process, unbeknownst to Mrs. Twombly and Blythe, Mrs. Twombly activates the robotic mice cat toys, sending them scurrying into the day camp room. Russell and Sunil chase one down, but Pepper tricks Sunil into thinking the mice will replace real pets in the future, worrying him into a corner. Blythe finds a moment and lets Mrs. Twombly know she will set up a Blythe Style display at the front window.
Meanwhile, Penny and Vinnie argue about whether Penny's silk dancing or Vinnie's tap dancing is better. Neither side giving in, they initiate a dance-off, which quickly ends as Vinnie trips on his tail and sends him and Penny crashing. They get the attention of a new face in the day camp room, however: Madame Pom, a pomeranian who was chosen over Zoe to be a professional lapdog model. Madame Pom suggests Penny and Vinnie dance together, for as opposites, they complement each other. Zoe drops in, however, and she and Madame Pom instantly rage at the other's presence. Zoe goes to the store front as Madame Pom remains in the day camp room.
Blythe sees Zoe and tells her she knows Madame Pom is there. Zoe warns Blythe that Madame Pom is evil and that she'll stay at that window for some time. Blythe then hears Mrs. Twombly scream—it turns out she's run out of Mrs. Applebottom's Omega-3 Cleaning Spray, the only spray she trusts. Mrs. Twombly rushes out the door to go buy some more and entrusts Blythe with responsibility over the storefront. Blythe steps into the day camp room and tells the pets she'll continue working on the window display. Seeing no trouble going on, she tells the pets not to roughhouse and heads back to the front.
Madame Pom borrows Sunil's cushion to watch Vinnie and Penny perform their new act. They dance together but still don't collaborate, causing the two of them to bump into each other, knocking over a bin of bouncy balls and spilling kibble all over the floor in the process. The food on the floor causes the other pets to come scrambling over, making even more of a mess. When they're done eating, Madame Pom shows a scrapbook of acting gigs she's done, but it ticks Zoe off so much that she comes over to give Madame Pom a piece of her mind, leaving both of them too enraged at the other to help with Russell's attempts to clean the shop.
Mrs. Twombly reaches the organic market to pick up more Mrs. Applebottom's but discovers they stopped stocking it as the company started sneaking in jet fuel. She tries the mega-sized department store next but, after much searching, also comes up empty-handed. Consumed with frustration, Mrs. Twombly delivers a rant about dirtiness to everyone in the parking lot before descending into an insane laugh.
Back at The Littlest Pet Shop, Zoe and Madame Pom find out about Blythe setting up a window display. They see her putting animal mannequins and both decide to model there to show up the other. Madame Pom returns to the day camp room to put on makeup when Penny and Vinnie ask if their dancing is professional level. They offer ideas to Madame Pom, but both involve solely their own style of dancing. Madame Pom hastily suggests a routine with swans and gets back to the mirror. At the storefront window, Blythe convinces Zoe that winning that one contest is not that important and that this act at the window will prove nothing. However, once Zoe calms down, Madame Pom returns to the window, riles up Zoe with more bombast, and puts on a Blythe Style outfit. Zoe, unable to take it anymore, finds a getup of her own, and the two engage in a pose-off as Blythe rolls her eyes.
Vinnie and Penny continue to practice dancing independently of each other. Vinnie's tap-dancing causes him to crash into things—and his hat toss sets off all of the robotic mice, which scurry everywhere in the shop crashing into more things. Penny's ribbon in her silk dance, meanwhile, tangles itself on all of the fixtures in the day camp room. One of the robotic mice makes its way to Blythe's feet, and she leaves to go put it back. Zoe and Madame Pom, left to themselves, furiously pose for passers-by and draw a crowd.
Mrs. Twombly zooms around the city rambling about dirtiness and dustiness when she discovers a window washer using Mrs. Applebottom's Omega-3 Cleaning Spray. She instantly calms down and obtains a bottle of her own, though it is not clear whether she found a place that stocks it or if she got it from the window washer.
Before Blythe even reaches the shelf of robotic mice, Vinnie and Penny have created a mess of the entire store. Russell, Pepper, and Sunil struggle to get everything back where they belong but cannot keep up, and Minka joins in on unleashing chaos. Blythe turns around to see Vinnie about to jump from the second-story railings for his "grand finale." She leaps to try to stop Vinnie, but he lands on a net of ribbons supported by all the furniture in the storefront, tugging on the net and causing the furniture to come crashing down. Zoe and Madame Pom get caught in it all too and get roughed up in the debris. Their audience having lost interest and left, they both have a good laugh at the fun they had at the window and gain respect for each other, Madame Pom admitting that Zoe is the better walker while Zoe admits Madame Pom poses better.
Vinnie and Penny emerge from the top of the destroyed furniture to realize the destruction they caused. Mrs. Twombly calls Blythe on the phone to let her know she'll return in twenty minutes. Upon hearing this, Russell coordinates everyone nearby—including Madame Pom—to sort everything out in the store, throwing away anything too damaged to be re-organized. They finish just in time for Mrs. Twombly to return, who's astonished at how tidy and clean the store is. Russell points out that her cleaning mood is over just before the garbage bag Vinnie negligently tossed upwards comes back down and douses everyone with dust.
This episode contains examples of (YMMV entries go here):
- Artistic License – Biology: The snake blinks twice in nervousness. Real snakes don't blink.
- Between My Legs: Mrs. Twombly's legs frame a woman and her two kids about to step into the department store right before she begins her crazy speech. Played for Laughs, of course.
- Big "NO!": Blythe utters one at Vinnie's grand finale.
- Brick Joke: A rather short one: Vinnie throws the garbage bag nearly straight up when Mrs. Twombly returns and doesn't seem to come back down. It turns out it was stuck on the chandelier and DOES fall back down, after Mrs. Twombly walks somewhere else.
- Call-Back: Russell escapes from the collapsing objects after Vinnie's grand finale with a Spin Dash.
- Chekhov's Gun: The robotic mice.
- Continuity Nod: Now that Russell has been a super neatfreak, it's Mrs. Twombly's turn in this episode.
- This episode marks the second time we see Blythe leaping to unsuccessfully stop someone in slow motion accompanied by a Big "NO!"
- Contrived Coincidence: There are suddenly a lot more furniture and cages on the floor and ceiling of the day camp room in Act 3 for Penny to bring down.
- Deadpan Snarker: Madame Pom seems to naturally be this way. Zoe starts taking up the part in her presence too.
- Early-Installment Weirdness: In this episode, we see pets for sale at the front area. Later episodes would demonstrate Littlest Pet Shop does not sell pets, even having "We don't sell pets" in their slogan.
- Flashback: A brief one for Zoe showing her getting passed up for a life in modeling to Madame Pom.
- Furry Reminder: Zoe and Madame Pom wag their tails in their flashback and, in the present, growl when angry.
- Gratuitous French: Madame Pom's way of speaking.
- Hypochondria: Mrs. Twombly feels this way when she's in a mood for cleaning, though judging from her actions as she searches for more cleaning spray, this is specific only to the interior of The Littlest Pet Shop.
- I Resemble That Remark!:Blythe: Aren't you being just a little dramatic?Zoe: Moi? Dramatic?
- Irony: The moment after Penny talks about silk dancing being as effortless as breathing, the ribbon nearly chokes her.
- Lampshade Hanging: Russell makes a speech about pulling together to clean up the store. Pepper interrupts him to point out that they have 20 minutes before Mrs. Twombly returns.
- Musicalis Interruptus: Vinnie crashes into a bucket of tennis balls before he can finish his first verse.
- No Celebrities Were Harmed: Madam Pom appears to be putting on an accent similar to Zsa Zsa Gabor.
- Noodle Incident: The snake in the pet shop store front is afraid of Mrs. Twombly's mere mention of her "snake scrubber." Presumably, she once mistook him for it.
- Offscreen Teleportation: Mrs. Twombly when describing how Mrs. Applebottom's Omega-3 Cleaning Spray is made. She does it again in the department store parking lot as she rants at anyone nearby.
- Prehensile Tail: Zoe shuts Russell's mouth by reaching her tail over up against it.
- Proud Beauty: Zoe calls Madame Pom "the biggest diva she ever met", even after they reconciled; the latter happly accept this.
- The Rival: Between Zoe and Madame Pom, and for a short while, Vinnie and Penny.
- Sanity Slippage: Mrs. Twombly, at least for this one day, sees dirt everywhere while no one else sees any. She is barely able to function. She descends further into insanity when she encounters problems finding Mrs. Applebottom's, leaping into people's shopping carts to inform them of their scarcity.
- Shout-Out: Madame Pom's second modeling photo shown onscreen puts her in the pose and bandanna on the head of Rosie the Riveter.
- Mrs. Twombly's adjectives to describe a dirty world include "dirty," "dusty," "dank," and "musty" in that order, paralleling Oscar the Grouch's "I Love Trash" song from Sesame Street.
- Snap Back: By the next episode, The Littlest Pet Shop is in the exact condition it's most commonly in.
- Stealth Insult: Zoe refers to Minka's abstract portrait of Madame Pom as having "captured her face perfectly." Madame Pom says one approximately half the time she opens her mouth.
- Sudden Anatomy: Like all the pets, Madame Pom's front paws can turn into hands with opposable thumbs whenever she needs to hold something. Made somewhat more jarring than usual by the fact that her front paws are pointed stubs.
- Take That!: Mrs. Applebottom's Omega-3 Cleaning Spray seems to be a parody of humane, organic, and environmentally-responsible products, based on the over-the-top means of producing them, though it may or may not be true. Mrs. Twombly even used to buy them in one of those good-earth type health markets.
- Team Mom: Blythe attempts this with Zoe in Act 3. Her words of kindness almost works on Zoe if it weren't for Madame Pom's timing.
- Technology Marches On: In-universe. Zoe boasts to Madame Pom that she has a mobile app whereas Pom only has a website.
- Tempting Fate: Mrs. Twombly trusts Blythe to keep the store clean while she's away. This being a work of fiction, there is only one possible end result.
- This Is Gonna Suck: Blythe's "uh-oh" when she sees Madame Pom boast to Zoe immediately after Blythe just calmed Zoe down.
- Three Lines, Some Waiting: The A-story concerns the rivalry between Zoe and Madame Pom, with the Penny/Vinnie dance plot tied directly to it. The B-story is initially about Mrs. Twombly keeping the store clean, but it eventually splits, creating a C-story about her looking for her favorite cleaning solution while Blythe inherits the B-story.
- Titled After the Song: In this case "Eve of Destruction", the 1965 Barry McGuire hit.
- True Art Is Incomprehensible: Invoked in-universe. Russell doesn't understand why a cat food company would bring in Madame Pom dressed up as a cat instead of actually using a cat. Madame Pom simply tells Russell that he's ignorant.
- Tyop on the Cover: The title screen misspells "Destruction" as "Destuction."
- What Happened to the Mouse?: All of the pets for sale shown in Act 1 are used for one-shot gags and disappear by the time the front area gets destroyed, even though they all live inside cages and tanks that were ruined by Vinnie and Penny's dancing.
- No explanation is made about what Blythe and the pets did to the destroyed furniture and items. Presumably, as we see Minka and Vinnie with gigantic bags of trash, and the parts of the room with most of the furniture is never shown again, they were most likely thrown away without getting replaced. However, it is possible that the destroyed furniture was eventually noticed and is why Roger pitches in to make new furniture in "Helicopter Dad" and "Door-Jammed."
