Bryan Flounder is first seen along with one of Pearl's friends as her date. Bryan appears to know Pearl as his date and is confirmed that he was from their math class. Bryan is also briefly seen during the Doing the Sponge song.
He appears in the crowd multiple times. One being when Pearl imagines herself seeing Boys who Cry, and another being when she enters the Krusty Krab and sees the "It's a boy" poster set up by Mr. Krabs.