List of alter-egos

Throughout the series, the main characters have all acquired several alter-egos, who normally only appear once in SpongeBob media.

Karen Plankton

• Racing worm - "Frozen Face-Off"
• Ms. Karen - "Salsa Imbecilicus"
• Karen the Cat - "The Legend of Boo-Kini Bottom"
• Karen the Computer Fairy - "Patnocchio" and "The Big Bad Bubble Bass"
• Mr. Krabs - "Girls' Night Out"
• Sunflower Karen - "The Flower Plot"

• Racing Worm
  Racing Worm
• Ms. Karen
  Ms. Karen
• Karen Cat
  Karen Cat
• Karen the Computer Fairy
  Karen the Computer Fairy
• Mr. Krabs
  Mr. Krabs
• Sunflower Karen
  Sunflower Karen

Sandy Cheeks

• Goldfish - "Scaredy Pants" and Nickverse
• Miss Appear - "Mermaid Man and Barnacle Boy V" and "Appointment TV"
• Karate Sandy - "Karate Island" and The Cosmic Shake
• Mr. Pavlovi - "The Fish Bowl"
• The Rodent - The SpongeBob Movie: Sponge Out of Water
• Ms. Cheeks - "Salsa Imbecilicus"
• Dr. Franken-Cheeks - "The Legend of Boo-Kini Bottom"
• Mr. Krabs - "Girls' Night Out"
• Super Sandy - "Squirrel Jelly"
• Cave fish - "To Save a Squirrel"
• Captain One-Eyed Sandy - "Camp Crossbones"
• Feral Sandy - "Nut Madness"
• Fish Monster Sandy - "A Fish Called Sandy"

• Goldfish
  Goldfish
• Miss Appear (Mermaid Man and Barnacle Boy V)
  Miss Appear (Mermaid Man and Barnacle Boy V)
• Miss Appear (Appointment TV)
  Miss Appear (Appointment TV)
• Karate Sandy (Karate Island)
  Karate Sandy (Karate Island)
• Karate Sandy (The Cosmic Shake)
  Karate Sandy (The Cosmic Shake)
• Mr. Pavlovi
  Mr. Pavlovi
• Ms. Cheeks
  Ms. Cheeks
• Dr. Franken-Cheeks
  Dr. Franken-Cheeks
• Mr. Krabs
  Mr. Krabs
• Super Sandy
  Super Sandy
• Cave fish
  Cave fish
• Captain One-Eyed Sandy
  Captain One-Eyed Sandy
• Feral Sandy
  Feral Sandy
• Fish Monster Sandy
  Fish Monster Sandy

Mrs. Puff

• Witch - "Scaredy Pants"
• Mrs. Pop - "Demolition Doofus"
• The Huff - "Demolition Doofus"
• Boat Thief (or "Bote Theef" as spelled by Patrick) - "Patrick-Man!"
• Atomic Flounder - "Appointment TV"
• Mr. Krabs - "Girls' Night Out"
• Incidental 154 - "Girls' Night Out"
• Ghost - SpongeBob Game Station
• Puff the Tuff - "Potato Puff" and "Salty Sponge"
• Driver X - "Lake Crashers"

• Witch (Scaredy Pants)
  Witch (Scaredy Pants)
• Mrs. Pop
  Mrs. Pop
• 
  The Huff
• The Boat Thief
  The Boat Thief
• Atomic Flounder
  Atomic Flounder
• Mr. Krabs
  Mr. Krabs
• Incidental 154
  Incidental 154
• Ghost
  Ghost
• Puff the Tuff
  Puff the Tuff
• Driver X
  Driver X

Pearl Krabs

• Bride of Frankenstein - "Scaredy Pants"
• Witch - The Big Halloween Scare
• Amy - "As Seen on TV"
• The Invisible Boatmobile - "Mermaid Man & Barnacle Boy VI: The Motion Picture"
• Mad Hatter - SpongeBob Game Station
• Princess Pearl - The Cosmic Shake
• Monstro - "Patnocchio"

• Bride of Frankenstein
  Bride of Frankenstein
• Witch
  Witch
• 
  Amy
• The Invisible Boatmobile
  The Invisible Boatmobile
• Mad Hatter
  Mad Hatter
• Monstro
  Monstro
• Princess Pearl
  Princess Pearl

Gary the Snail

• Squidward Tentacles - "Opposite Day" and "SpongeBob's Place"
• Dirty Bubble - "Appointment TV"
• Fred - The SpongeBob Movie: Sponge on the Run
• King Gary - The Cosmic Shake
• SpongeGary - "Gary's Playhouse"
  • Mermaid Snail - "Gary's Playhouse"

• Squidward Tentacles (Opposite Day)
  Squidward Tentacles (Opposite Day)
• Squidward Tentacles (SpongeBob's Place)
  Squidward Tentacles (SpongeBob's Place)
• Dirty Bubble
  Dirty Bubble
• Fred
  Fred
• King Gary
  King Gary
• SpongeGary
  SpongeGary
• Mermaid Snail
  Mermaid Snail

Patchy the Pirate

• Patchy the Caveman - "Ugh"
• Pagey the Pirate - "Truth or Square"

• Patchy the Caveman
  Patchy the Caveman
• Pagey the Pirate
  Pagey the Pirate

Potty the Parrot

• Robot - "Ugh"

• Robot
  Robot

Mermaid Man

• Ernie - "Mermaid Man Begins"

• Ernie
  Ernie

Barnacle Boy

• Barnacle Man/Kyle - "Mermaid Man and Barnacle Boy V"
• Tim - "Mermaid Man Begins"

• Barnacle Man/Kyle
  Barnacle Man/Kyle
• Tim
  Tim

Larry the Lobster

• Mermaid Man - "Appointment TV"

• Mermaid Man
  Mermaid Man

Bubble Bass

• Captain Counselor - "Are You Afraid of the Dork?"
• The Big Bad Bubble Bass - "The Big Bad Bubble Bass"

• Captain Counselor
  Captain Counselor
• The Big Bad Bubble Bass
  The Big Bad Bubble Bass

Rube Goldfish

• Space Rube - "Patrick's Got a Zoo Loose"

• Space Rube
  Space Rube

Squidina Star

• Ouchie - "The Patrick Show Sells Out"
• Werewolf - "Which Witch is Which?"

• Ouchie
  Ouchie
• Werewolf
  Werewolf

Bunny Star

• Superhero Bunny - "A Root Galoot"

• Superhero Bunny
  Superhero Bunny

Dorsal Dan

• Tooth Fairy - "Ain't That the Tooth"

• Tooth Fairy
  Tooth Fairy

Sockeye Sammy

• Patrick Star - "Patrick's Prison Pals"

• Patrick Star
  Patrick Star

Spot

• GarySpot - "Gary's Playhouse"

• GarySpot
  GarySpot

PatSlug

• Barnacle Snail - "Gary's Playhouse"

• Barnacle Snail
  Barnacle Snail

Goofy Manager

• The Goobfather - "The Goobfather"

• The Goobfather
  The Goobfather

SpongeBot SteelPants

• Robo-SpongeBob MusclePants - Battle for Bikini Bottom

• Robo-SpongeBob MusclePants
  Robo-SpongeBob MusclePants

Globulous Maximus

• SpongeGlob - SpongeBob SquarePants featuring Nicktoons: Globs of Doom

• SpongeGlob
  SpongeGlob