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— Frank, "Gullible Pants"
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Frank, also known as Incidental 105, is an incidental character who first appears in the episode "Valentine's Day." His incidental type is currently unknown.
Description[]
He is an olive green colored mackerel with a long neck. He has a tan colored underside and fins, three darker olive green spots on each side of his head, and light orange lips. He wears a red t-shirt.

Alternate design of Frank.
He also has an alternate design that first appeared in "The Flower Plot," where he is colored dark orange with a light orange underside and dorsal fin, lavender lips, and wears a light blue shirt. His palette greatly resembles Incidental 101's. He also lacks the three spots on both sides of his head.
Names[]
Frank is the only name Incidental 105 has been given in the franchise. It is used for him in "Krusty Dogs."
Other[]
- In "Good Ol' Whatshisname," an unmarked group of three from the finite selection of Incidentals 41, 48, and 105 are named Chas, Cara, and Mavis.
- In "Dirty Bubble Returns," one of the students from a class at Poseidon Elementary School containing Incidentals 15, 16, 103, 105, and 150 is named Billy.
Role in series[]
Frank is a fairly commonly used incidental character. He has made many notable and speaking roles and well as minor ones throughout the series. He makes his biggest role yet in "Gullible Pants." He was firstly designed to be a patron at the Valentine's Day Carnival.
Major roles[]
"Valentine's Day"[]
He is one of the carnival patrons that gets cornered by Patrick at the pier.
"The Smoking Peanut"[]
He is seen screaming and running around in circles after the loudspeaker tells them to do so due to Clamu's freak out.
"Sandy, SpongeBob, and the Worm"[]

Frank gasping in front of the screen.
He gasps in front of the screen when Sandy reveals that the Alaskan Bull Worm ate her tail.
"As Seen on TV"[]
He appears at the Krusty Krab as a kid with Incidental 151, searching for the ketchup pump. He is also part of the angry mob demanding Krabby Patties from SpongeBob.
"Mermaid Man and Barnacle Boy V"[]
He is among the customers who cheer when they hear that Mermaid Man is ready to order at the Krusty Krab and then groan in disappointment when Barnacle Boy interrupts his order.
"Krabby Land"[]
He appears as a child happily watching Mohawk brute 1 and Mohawk brute 2 each hit SpongeBob over a net with their tennis rackets.
"The Sponge Who Could Fly"[]
He appears riding a plane and watches SpongeBob fly during "He's Flying."
"Good Neighbors"[]

Frank driving with Gale.
He is seen with Gale and is driving his car when he goes out of it because they think Squidward is sick because of his red spots, which is actually red paint sprayed on his face.
"Once Bitten"[]

Frank freaking out with Squidward and Perch Perkins.
He is seen in Perch Perkins' news report while he interviews Squidward, telling them that he got bitten by a snail and he has a loss of balance. The three of them then end up believing that Mad Snail Disease is spreading through the air.
"The Gift of Gum"[]
He is one of the fish who becomes trapped inside Gummy but gets freed by SpongeBob.
"Bucket Sweet Bucket"[]

"Give me four."
At the end of the episode he tells Mr. Krabs that $25 is over priced for a Krabby Patty but Mr. Krabs then convinces him to buy four Patties for $100 due to the fancy redesign of the Krusty Krab.
"The Krusty Sponge"[]
He is seen at the Krusty Krab with Steve where he is seen whispering to him during Gene Scallop's review on the Krusty Krab.
"Sing a Song of Patrick"[]
He listens to "Twinkle, Twinkle, Patrick Star" on a radio at the Radio Chest and freaks out.
"Goo Goo Gas"[]

Plankton as a pepper shaker stealing Frank's Krabby Patty.
Plankton steals his Krabby Patty at the beginning of the episode while disguised as a pepper shaker.
"Blackened Sponge"[]
He is seen at the Krusty Krab with Sandals where SpongeBob disturbs them with his black eye.
"The Battle of Bikini Bottom"[]
He appears as one of the red soldiers filling their cannon with soap.
"Slide Whistle Stooges"[]

Frank leading the angry mob.
He is seen complaining when Squidward rises himself with a slide whistle and goes down a manhole and later appears after Incidental 24 believes that Lenny made a wolf whistle at his girlfriend, Incidental 7, Frank appears as the leader of the angry mob that goes after Squidward and tells Incidental 24 that Squidward was responsible for the wolf whistle by using a slide whistle.
"Boating Buddies"[]

Frank playing his tape recorder.
He uses his tape recorder at Mrs. Puff's Boating School to replay Squidward telling SpongeBob that he doesn't need his help and he doesn't need him, causing Squidward to call him a jerk.
"Ditchin'"[]
He appears playing volleyball with Judy as his teammate against Carol and Incidental 27 where they mistakenly use SpongeBob as a volleyball.
"Gullible Pants"[]

SpongeBob knows his secret…
His biggest role yet. SpongeBob hires him as a fry cook in order to follow one of the Krusty Krab's 'secrets' as told by Squidward. He remains the fry cook of the Krusty Krab for the rest of the episode.
"No Hat for Pat"[]
Patrick accidentally hits him with the Krusty Krab arrow sign. He later realizes that Patrick's flopping has gotten stale when Steve points out that it has gotten pretty old.
"Chum Bucket Supreme"[]
He receives a bucket of chum from Plankton.
"Truth or Square"[]
He yells "Boo you stink!" at SpongeBob's and Sandy's wedding with the stage light falls.
"The Clash of Triton"[]

Mr. Krabs taking Frank's dollar.
He is seen paying Mr. Krabs with a twenty dollar bill to watch King Neptune eat and asks if he can make change for it, but Mr. Krabs tells him no and takes his twenty dollar bill anyway.
"Tentacle-Vision"[]
The TV producer claims that he is not doing well in Squidward's show.
"I ♥ Dancing"[]
He and Judy receive their Krabby Patties from SpongeBob while he is dancing.
"Stuck in the Wringer"[]
He is seen stealing Mr. Krabs' money after SpongeBob trips on the cash register.
"Someone's in the Kitchen with Sandy"[]
He is seen as one of the angry fish tossing juice boxes at a naked Sandy.
"Kracked Krabs"[]

Beuford BargainBottom scanning Frank's chips.
He appears in Beuford BargainBottom's video where he charges him a bag of chip three times due to being three times the flavor.
"Squidward in Clarinetland"[]
He struggles to order over the appliance noises SpongeBob makes from inside the locker.
"Summer Job"[]
He and Incidental 49 run away from their table when Mrs. Puff nearly runs into it by rolling on a barrel.
"The Cent of Money"[]
Mr. Krabs eyes his bucket of coins at the Fun Arcade and he also stares at Mr. Krabs when he raises Gary the Snail.
"The Masterpiece"[]
He pays Squidward a dollar at the Krusty Krab at the end of the episode.
"Whelk Attack"[]

Frank getting devoured by a sea whelk.
He gets devoured by a sea whelk.
"Krusty Dogs"[]

Frank showing interest in a Krusty Dog.
He is the first customer to order a Krusty Dog and he then tells Incidental 42, Incidental 60, and Steve about it. He is also seen with Harold when Incidental 41's Krusty Dog explodes all over his face.
"The Other Patty"[]
He smells the Flabby Patties from the Flabby Patty Shack at the Krusty Krab and literally disappears.
"The Hot Shot"[]
He is one of the students at Mrs. Puff's Boating School that cheers for the arrival of Tony Fast Sr. and Tony Fast Jr. He also watches Tony Jr. drive himself and teach SpongeBob how to drive.
"Sweet and Sour Squid"[]
He is seen as a student at Mrs. Puff's Boating School when her window shatters from Squidward's bad clarinet playing.
"Bubble Troubles"[]
He is seen at the Krusty Krab with Incidental 48 where Sandy eats his Krabby Patty after she runs out of air.
"The Way of the Sponge"[]
SpongeBob kicks his Krabby Patty onto his plate.
"Restraining SpongeBob"[]

Frank concerned.
He orders two Krabby Patties at the Krusty Krab from Squidward but he hears SpongeBob squirting an empty mustard bottle and assumes that it is the sound of Squidward being gassy.
"Planet of the Jellyfish"[]
His Jellien clone is seen pointing and hissing at Incidental 37B with Squidward's Jellien clone and Fred's Jellien clone at the Krusty Krab.
"Free Samples"[]

Frank blasting himself up into the sky.
He blast himself up to the surface of the ocean after trying a "new" Krabby Patty. He then gives SpongeBob his wallet so he can buy even more patties.
"InSPONGEiac"[]
He makes an order to Squidward at the Krusty Krab.
"Glove World R.I.P."[]
He and Sandals become offended by Patrick for cutting in line in front of them while he is wearing the glove mascot costume.
"Demolition Doofus"[]

Frank at the Bikini Bottom Hospital.
He appears walking at the Bikini Bottom Hospital with a blood bag while SpongeBob walks over to Mrs. Puff's room.
"Patrick-Man!"[]
He appears at the Krusty Krab with Gale where Patrick attempts to unmask them. This causes them to get upset and Frank claims that they will never eat at the Krusty Krab again.
"License to Milkshake"[]
He is seen wanting to purchase a milkshake after seeing SpongeBob successfully make a milkshake for Harold.
"Little Yellow Book"[]
He is seen gnawing on a table with other ravenous customers and then becomes amazed when he and Harold receive their Krabby Patties from SpongeBob on the ceiling.
"Plankton's Pet"[]

Frank watching Spot steal a Krabby Patty.
He is seen at the Krusty Krab making an order to Squidward until he sees Spot exiting the kitchen with a Krabby Patty. He asks Squidward what that was, who says he didn't see it and does not care.
"SpongeBob You're Fired"[]
He is seen at Taco Sombrero with Stretch and Steve where Stretch takes a bite from SpongeBob's Burrito Patty and ends up squirting the beans from the burrito from the sides onto his and Steve's faces.
"The Sewers of Bikini Bottom"[]
He is seen with Sandals where he complains to him about having to flush a toilet at the Krusty Krab Stadium twice and Sandals claims that they call the stadium a modern marvel.
"CopyBob DittoPants"[]

Squidward slapping Frank's Krabby Patty onto the floor.
Squidward slaps his Krabby Patty off of his hands due to him thinking that he is dreaming.
"Lame and Fortune"[]
He becomes amazed when a fortune cookie lands onto his plate.
"Salsa Imbecilicus"[]
He is one of the idiots who get stung by a jellyfish. He also appears as one of the idiots in class who stupidly respond to Sandy's good morning.
"Mermaid Pants"[]
SpongeBob and Patrick splatter trash all over him while playing Mermaid Man and Barnacle Boy.
"Code Yellow"[]
He appears as a patient in the hallway when Mrs. Puff and SpongeBob go zooming on an iron lung.
"The Clam Whisperer"[]
He is one of the incidentals who gets attacked by the clams outside of the Krusty Krab. He is also part of the riot who want to drive the clams out of town.
"Cuddle E. Hugs"[]
He witnesses Cuddle E. Hugs at the Krusty Krab.
"Drive Happy"[]
He watches SpongeBob ride Coupe from inside his boatmobile.
"Mustard O' Mine"[]

Frank groaning with other incidentals.
He groans when SpongeBob runs out of mustard.
"Whale Watching"[]
He appears as a teen at the breach party roasting marshmallows.
"ChefBob"[]
He appears as one of the customers who watch SpongeBob cook at the beginning of the episode. He later appears watching ChefBob and SpongeBob fight and is one of the customers who gets slapped from the fight as well as being disturbed by SpongeBob slamming ChefBob in the cash register.
"Plankton Paranoia"[]
He appears as one of the sick customers after the Krusty Krab red alert mode.
"Call the Cops"[]
He shockingly watches SpongeBob and Mr. Krabs hug.
"Surf N' Turf"[]
He runs out of the way when he sees Mr. Krabs with Sandy Cheeks' treedome heading towards the competition.
"Goons on the Moon"[]
He is one of the incidentals in downtown Bikini Bottom who suffer from no water until the sea rises back up again.
"The Ballad of Filthy Muck"[]

Gale walking Frank.
He runs out of the Krusty Krab when Patrick enters it. He later appears when he and Gale saw SpongeBob walking his nose on a leash, Frank tells Gale that Bikini Bottom is a pet friendly neighborhood which causes Gale to walk Frank on a leash.
"The Krusty Slammer"[]
He is one of the customers who applaud when Mr. Krabs promotes the Krusty Slammer and is later seen being disturbed by the prisoners in the slammer tossing tomatoes.
"Stormy Weather"[]
He can be seen running away from Drizzle in downtown Bikini Bottom.
"Squid's on a Bus"[]
He is part of the pillow fight at downtown Bikini Bottom.
"Handemonium"[]
He is one of the fish that the Chum Bucket glove squeezes out of the bus.
"Breakin'"[]

SpongeBob watching Frank eat.
SpongeBob watches him eat during his break.
"Escape from Beneath Glove World"[]

Incidental 8 wearing gloves in order to prevent her from getting sick from Frank.
He appears as an actor in the "Gloves Song" film where he sneezes on Incidental 8's hand but then shows that the gloves she is wearing are avoiding her from getting sick from him.
"Say Awww!"[]
He is seen as one of the fish on the roller coaster at Glove World! that gets eaten by Q.T.-π and later appears on the roller coaster again when everyone escapes from Q.T.-π.
Major roles in games[]
Battle for Bikini Bottom/Battle for Bikini Bottom: Rehydrated[]
He appears as a common NPC throughout the game.
The Cosmic Shake[]
He appears as one of the three cavewoman that kidnap Squog.
Trivia[]
- He makes his first speaking role in "Good Neighbors."

Frank's red soldier variant with Incidental 101's color palette.
- Before the debut of his alternate design variant in "The Flower Plot," he had a red soldier variant from "The Battle of Bikini Bottom" that has a paler palette than his alternate design variant. This variant also had three spots on the sides of his head, unlike his alternate design variant.