Incidental 42 (named Dave,Frank,Percy,Isabelle,Harold, and Scooter) is one of the most common background characters in the series. This character model first appears in the episode "Ripped Pants" and is a red-orange fish who usually wears a baby blue top.
Incidental 42 has had both female and male voices in the series, as well as both female and male names.
Incidental 42 is a red-orange fish with beige fins and light olive-green lips who wears a baby blue top.
Like all of the fish background characters, Incidental 42 has been paired with many different fish throughout the show.
In "Valentine's Day," Incidental 42 thanks SpongeBob for a present: a bouquet of flowers. SpongeBob says "You too, Dave."
In "Dying for Pie," SpongeBob shows Squidward to everyone in Bikini Bottom. The last person seen to be introduced was Incidental 42, who Squidward calls Frank. He says "Hey, Frank."
In "I Had an Accident," Incidental 42 is a football player whose name is Percy. Peterson Nat Tucker is the coach and says, "Nice catch, Percy!" Peterson then spanks Incidental 42 as a playful gesture, which scares SpongeBob. The pair are later seen next to each other in the seven-mile spanking machine.
In "Good Ol' Whatshisname," Incidental 42's name is revealed to be Isabelle when Squidward reads from the book of names.