At the Pet Expo, the Biskits sabotage Blythe at every turn, fueling superstitions over her entry. At the end, the Pets and Blythe are able to recover her stuff and exposes the Biskits' sabotage. The Biskits' butler confesses that they made him take part of their scheme. They fired their butler. The butler became a photographer. The Biskits are humiliated and expose for their crime. Blythe won the International Pet Fashion Expo. Pets got their faces at the magazine.

Blythe stresses over the upcoming International Pet Fashion Expo when she is asked to do a photo shoot for Très Blasé.

When Blythe gets accepted into the junior program at a fashion school, she, along with her family and friends from school and at Littlest Pet Shop, have to bode with the anxiety of her leaving.

Blythe must babysit Buttercream while trying to finish reading a book simultaneously, while Pepper struggles to socialize with a visitor to the day camp whom she finds herself smitten with.

While on her way to meet with her friends at a flash mob, Blythe gets trapped in the dumbwaiter along with Zoe, Pepper and Minka. While Penny Ling tries to attract the attention of the boys to get them out from the dumbwaiter, Zoe and Pepper start to fight, and within their compact space, Minka's claustrophobia is triggered.

After moving into an apartment, Blythe Baxter gains the ability to communicate with animals after falling in a dumbwaiter. There, she meets a group of pets who reside in a day camp area of a pet shop, who enlist her help when the store is on the verge of running out of business.

Blythe uses the pets as diversions in order to rescue Zoe's sister from inside Largest Ever Pet Shop, an expansive pet store retail chain owned by the Biskit twins' father, Fisher Biskit.

Roger takes Blythe and the pets to a camping trip in search of Bigfoot.

The pets try to convince Minka that she is the first monkey to land on Mars, and Pepper asks Blythe for input for her stand-up comedy act.

Roger reveals to Blythe that he has just submitted Blythe's pet backpack to Mona Autumn, a critic for the top fashion magazine, Très Blasé. Knowing that Autumn's critiques are notoriously harsh, she starts panicking about her interview, ignoring the pet's problem with a new visitor, Wiggles McSunbask (voiced by Colin Murdock), a juvenile alligator who soon takes over the day camp. When Blythe's designs are rejected by Mona, as feared, and suggests that she peruses another career, she grows depressed, much to the sadness of Roger and the helplessness of the pets.

Blythe must trade in her scooter for a sales kiosk in order for her to enter enter the International Pet Fashion Expo. Meanwhile, Roger's airline launches a "Pet Jet" service, with the pets using it to launch one of their largest fantasies yet.

When Blythe fills in for Zoe's owners and accompanies her to a dog show in Paris, they suddenly find themselves smitten; Blythe with the city and Zoe with a mime artist dog named Philippe.

In the second part, Blythe hosts an animal fashion show featuring the pets in order to drive revenue to the pet shop. Meanwhile, the Biskit twins Brittany and Whittany plan to stop Blythe by embarrassing her during the climax of her show.

On nail-clipping day at the day camp, Sunil becomes anxious about being clipped and cowers in fear in front of Blythe's friends. Jasper, who finds his worried facial expression cute, takes a picture of him with his phone and edits it into an image macro. Soon after he uploads the macro on the Internet, Sunil and the day camp attracts media coverage from across the globe. His attention becomes the source of jealousy for Zoe, and the vanity of the Biskit twins, who produce a music video of themselves in an attempt to become viral.

Penny Ling decides to give Sunil a superhero outfit and make the two of them a superhero duo in order to help Sunil overcome his fears. Sunil pretends to rescue his friends, which becomes a problem when he believes he actually has superpowers. Meanwhile, with the help of Russell and Sugar Sprinkles, Blythe helps Youngmee and her aunt Christie find an ideal parking space for the Sweet Delights truck, only to compete for it against the Biskit Twins.

Blythe stumbles upon some keys belonging to her crush, Josh Sharp, and goes searching for him using Sunil's precognition. When he assumes she has gotten lost due to his own lack of faith in his psychic abilities, he enlists the help of his friends, along with larger-than-life parrot Esteban Banderas.

Russell, Zoe, and Vinnie, along with Buttercream, try to retrieve a recipe stolen from Blythe by the Biskits, who plan to use it for a baking competition hosted at Blythe's school. All the while, Vinnie has a vision of cakes occupying the world.

Blythe discovers Mrs. Twombly's past as the inventor of a unique martial art. Meanwhile, Pepper's comedy idol, Old Bananas, comes to visit the day camp, but finds herself struggling to amuse him with her jokes, in order to earn his signature thumbs up of approval.

When Blythe and the pets travel to Shanghai to attend a ceremony honoring Mrs. Twombly as originator of Kung Fu Quilting, Penny Ling is reunited with family she never knew she had. Meanwhile the pets prepare a Chinese dragon dance to ward off spirits.

Zoe, temporarily bandaged due to an embarrassing pimple on her nose, asks Penny Ling to pass along her romantic feelings to her crush, Digby, during his stay at the day camp. Meanwhile, Russell hides in Blythe's backpack, wanting to pursue an education, but gets lost within the corridors of her high school.

Youngmee's Aunt Christie opens a confectionery store adjacent to Littlest Pet Shop, and the pets meet pet Buttercream Sunday, a hyperactive rabbit, who invites them to overindulge themselves on the sugar-filled treats located in Christie's pantry.

After losing a ball while playing catching, Minka and Penny Ling try to retrieve it when it rolls into a natural history museum. Blythe tries to retrieve the two without losing all the other pets, but finds out that the museum disallows animals. She conceals the rest in her bags and backpack, but as she spots the two that were missing, Zoe flees from her bag upon inspection from the museum's security guard. Now with three of the pets missing, Blythe must manage to find them all, eventually losing the rest in the process: Sunil and Vinnie in the taxidermy section, and Russell in a supply closet.

An old nemesis shows up to defeat Blythe and the pets competing in the Carnival parade in Rio.

Russell tries to reconcile Sunil and Vinnie's friendship after an emotional falling out sparks between them.

Minka tries to befriend an antisocial tortoise named Olive Shellstein, who is dropped off at the day camp, but stumbles to get her out of her shell before she has to leave. Meanwhile, Roger surprises Blythe at her high school, wishing to spend the day together.