Barbie "Malibu" Roberts and Barbie "Brooklyn" Roberts discover a mysterious baby Pegasus on the beach in Malibu and work to find out where the magical horse came from.
Genre: Animation, Adventure, Comedy
Cast:Tatiana Varria , America Young , Alex Cazares , Kirsten Day , Ritesh Rajan , Eamon Brennan , Cristina Milizia , Lisa Fuson , Natalie Lashkari , Mela Lee , Caleb Yen , Cassandra Lee Morris , Dino Andrade , Tiana Camacho , Ariana Nicole George , Kat Cressida , Emma Adele Galvin , Greg Chun
A new school year begins with "Brooklyn" and Rocki joining Golden Beach High. At the same time, a mysterious new student named Leo enrolls, and a magical gem is stolen from Mesmer. Barbie and Brooklyn suspect that something strange is happening in Malibu.
During a school field trip to a museum, a mysterious new student named Leo joins the group. Leo inspects an ancient vase artifact from the Pacific Ocean, but someone tries to steal something, leading to the cancellation of the field trip. Malibu and Brooklyn suspect that Leo attempted to steal a gem. Meanwhile, Peggy visits Ken and informs him that an air gem has been stolen from Mesmer. She believes that someone brought it to the human world to unite it with two other powerful gems. Ken borrows Elvy's staff to detect magic from the museum gem, but nothing happens. Unbeknownst to him, the magical item is actually the ancient vase in the museum. In parallel, Brooklyn and Daisy become closer while working on the school play. Chelsea, on the other hand, thinks she can use magic to win a spelling bee, but she ultimately relies on her own abilities.
When a mysterious creature called a bunnycorn tries to sabotage Simone and Kel's exhibit opening at the museum, Malibu and Brooklyn chase after him before his sneaking ends the magical night in a wreck. Meanwhile, Stacie attempts to hide from the Glyph Council when she has to come with Rocki for a presentation on how humans act.
Malibu and Brooklyn attempt to summon the bunnycorn to learn who its master is while Ned and Ted try to accomplish the same goal to prove that there's magic in Malibu for their documentary. Meanwhile, Skipper starts her own club at the dreamhouse to avoid being left out.
While at Dru's house in Malibu, Leo discovers a book with a figurine of a unicorn girl inside. When he pulls it out, she transforms into a real unicorn named Victory. Malibu, Brooklyn, Stacie, Chelsea, and Skipper bring Victory to the fair, where a fortune teller predicts subjects of the future.
When Leo's potion to keep him from turning into a centaur runs out, he and Malibu must visit a vampire to get a refill. Meanwhile, Teresa and Brooklyn journey to Mesmer to return Victory to her three unicorn sisters, who take Teresa and Brooklyn through a set of challenges to see if they are worthy.
After Brooklyn falls into a magical whirlpool in Mesmer, she transforms into a mermaid and reunites with a mermaid friend named Talleigha, as well as meeting London, Harper, Charlie, Emily, and Coralia. Together, they try to find the water gem, which slips through a portal and disappears. Brooklyn chases after it while Malibu, Rocki, Ken, and Leo read about the legend of the centaurs and the Sapphire Fairycorn.
As Malibu jumps from portal to portal as a mermaid looking for Brooklyn, Brooklyn herself struggles to escape from Banishment Island, where Will the Wizard Lizard is trying to help her escape, secretly after the water gem that could bring him freedom.
After a making a wish to turn her parents into babies, Skipper learns how hard it is to be a parent.
After finding out that she didn't audition for the musical fair and square, Rocki admits that she's a fraud and runs away. Meanwhile, Teresa and Malibu discover Dru's evil plot while the bunnycorns cause chaos. Is this the end of Mesmer and the school play?
All the gang has to do is stop one evil author. Easy, right? Wrong. Not so easy when half of the crew is stuck in a different dimension with the banished centaurs. In a desperate measure, Alo calls out to the Sapphire Fairycorn for help, who will only intervene if the centaurs can find the gift in their dimension.
As Dru takes all the magic for herself, the gang must one last time journey to Mesmer to help before the world loses all of its magic. Unfortunately, Dru picks up on Malibu, Brooklyn, Ken, and Rocki's plan and puts an end to Mesmer's magic, taking it all for herself.
Everyone take a seat for Golden Beach High's new musical. After Rocki quits, Brooklyn steps up to play Rocki's part. But after Leo has to leave early to lead his people back to Mesmer, the show slowly starts to crumble apart. Meanwhile, Rocki learns that if she doesn't return to Mesmer, she will turn into a human forever. The show must go on... But will it?