Pearl's getting ready for her slumber party, but Mr. Krabs' meddling in the party preparations is getting out of control. Pearl forces him out of the house and orders him to stay at SpongeBob's house until the party's over. But that doesn't stop Mr. Krabs from finding out what's going on at the party – he sends his #1 employee SpongeBob to be his undercover spy! SpongeBob decides to enter Gary in a pet show, but when he sees how well-groomed and well-dressed the other pets are, he realizes that he needs to give Gary a makeover. But Gary isn't so keen on being primped and made into a pretty show snail, and as it turns out, neither are any of the other pets in the pet show.