In the B-story, the Grandes have a day off from Pocket-hunting, but when Gwen finds the girls, she helps them escape so that Griselle won't ruin things for her. Open the compact to discover a colorful undersea world with a brilliantly colored holographic background that really shimmers, 2 mermaid dolls, an enchanting treasure chest featuring a beautiful golden finish, and a clam that opens to reveal the perfect 'pearl' ring to wear and collect. However, after shrinking Paxton down with them, the girls end up chasing him as he runs off to play. But, when the girls discover Griselle's attempts on stealing the locket, the girls have to work together to keep it safe. While at girl scouts camp in the hopes of promoting to a higher rank, the girls find Lila incapable of certain outdoor skills, and that a ghost named the Pearl Lady supposedly haunts the grounds.

Polly, Lila and Shani are on the planning committee for the school's fall formal dance, but get stuck with Nicholas Wells as their partner. Beautiful underwater details include a golden treasure chest, seashell vanity, seahorse chair and moving jellyfish.Now, Polly and her friends must work together to keep the locket from falling into Griselle's hands. The Polly Pocket™ Keepsake Collection Mermaid Dreams™ compact is from the collection vault and has never been seen before until now!

Griselle stole the locket and now Polly, Lila, Shani and Melody have to work together to get it back and make everyone big in time for Melody to sing. When the girls find and nurse a baby bird back to health, Polly wants to keep it, but Shani convinces her to help it get home. The Polly Pocket™ Keepsake Collection brings back the magic of classic fan favorites from the heritage Polly Pocket™ vault some are never-before-seen compacts and others are updated recreations. You can punch out the background in three different sections to reveal 3 "hidden hideouts" and 3 surprise randomized accessories (2 that Polly doll can wear). However, a disguised Griselle and Gwen snatch the locket, trapping the girls at doll-size, and the girls apply Lila's fashion savvy skills to track them down.Bring back the magic of classic fan favorites from the heritage Polly Pocket™ vault with the Polly Pocket™ Keepsake Collection. Polly and her friends want this year's Halloween to be the best one ever, but Griselle puts a kink in their plans when she goes undercover in the Haunted Hayride to steal Polly's locket.