Sandy and Pearl share a mutual friendship because they are both mammals, and Pearl believes that mammals need to stick together no matter what.
Interactions throughout the series[]
In "Bubble Troubles," Pearl helps Sandy by giving her air. SpongeBob attaches Sandy to the blowhole on top of Pearl's head, and they share air until the end of the episode when Sandy is back to normal.
At the beginning of the episode "Mr. Krabs Takes a Vacation," Sandy and Pearl sit together while Mr. Krabs gets everyone (except Squidward) excited about the story of the Krabs family's vacation.
In "Texas," Pearl is at the Krusty Krab and wants Sandy to stay in Bikini Bottom. She brings "peas-in-a-can pie" to try and help make Sandy feel at home. Pearl later cheers for Sandy when she decides to stay in Bikini Bottom.
In "Feral Friends," Pearl attends Sandy's birthday party. When Neptune's Moon makes Pearl become a feral whale, Sandy grabs onto Pearl's tail to bring her to the Treedome.
Pearl also becomes a part of the Gal Pals in "A Cabin in the Kelp," and Sandy gives Pearl a special Gal Pals necklace that used to belong to Flibberty Gibbet.
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