The Roberts host their neighbors at the Dreamhouse when an earthquake causes a power outage. Meanwhile, Barbie and Skipper decide to raise funds for the destroyed library.

The Roberts family are driven to enter Malibu's annual Family of the Year contest, competing against the family that has won every year for the past decade: the Reardons.

Barbie tries to help Skipper adjust to high school by inviting her to join her lunch table. When Skipper bonds with her friends, Barbie unexpectedly feels left out.

Barbie and Skipper collaborate on their school community service project at the Water Park, but the two clash when Skipper does not put in an equal amount of effort.

With a new ice rink in town, Barbie and her friends put on a show to promote it. However, Nikki gets hurt before the show, and their only choice for a replacement is a mysterious yet skillful chicken-masked ice skater.

Aunt Adele's inn is haunted by a ghost of a miner.

To gain more popularity in school, Tammy decides to imitate Barbie. When it goes too far, Barbie begins to feel deprived of her individuality. Meanwhile, Trey struggles to find a birthday gift for his mother, while Stacie and Chelsea agree to babysit a fashionable macaw named Bella, and end up losing her. Their problems intersect when Bella lands up at the Reardons' home, and Trey's mother, mistaking it for Trey's gift, falls in love with her. How will the Roberts sisters retrieve her?

The Dudes & Trey get into a fight that results in the Dudes befriending Barbie instead. Without the Dudes, Trey finds a friend in Ken when they bond over a video game.

After her boss is fired, Barbie is promoted with new responsibilities. Unfortunately, she learns that one of those responsibilities is that she has to fire Ken. Meanwhile, Skipper and Stacie join Chelsea on a quest to find a missing mermaid, but end up getting lost.

George decides to take the family on holiday to Costa Rica where he will be filming a whale documentary, while Barbie and friends land summer jobs at a water park in Malibu.

Barbie's friends struggle to adjust to her becoming their boss at Oceans Extreme. In Costa Rica, Stacie, Skipper and Chelsea close in on the missing mermaid.

On her first day back to school, Barbie learns that Golden Beach High's newest student is none other than Tammy, her opponent from the baking competition show.

Barbie and her friends create a plan to stop smugglers and save a baby whale. As a reward, Barbie gets a ticket to Costa Rica, where she joins her family to see the whales arrive.

Barbie, Tammy and all of Golden Beach High team up to defeat their rivals, Empire Coast High—which tests Tammy's loyalties due to them being her former school.

Barbie offers to help Renee build her school basketball team by trying out, but she soon realizes that she is not as great as she thought she would be.

Skipper borrows Barbie's jacket without permission and ends up misplacing it. The two sisters race around town trying to retrieve the jacket, which has their father's 20th anniversary gift to their mother in its pocket, but are always one step behind.