Throughout the series, the main characters have all acquired several alter-egos, who normally only appear once in SpongeBob media.
SpongeBob SquarePants[]
Patrick Star[]
Squidward Tentacles[]
Eugene H. Krabs[]
Sheldon J. Plankton[]
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
Ms. Karen
Karen Cat
Karen the Computer Fairy
Mr. Krabs
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"
Goldfish
Miss Appear (Mermaid Man and Barnacle Boy V)
Miss Appear (Appointment TV)
Karate Sandy (Karate Island)
Karate Sandy (The Cosmic Shake)
Mr. Pavlovi
Ms. Cheeks
Dr. Franken-Cheeks
Mr. Krabs
Super Sandy
Cave fish
Captain One-Eyed Sandy
Feral 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)
Mrs. Pop
The Huff
The Boat Thief
.jpg "Atomic Flounder(Mrs. Puff).jpg (28 KB)")
Atomic Flounder
Mr. Krabs
Incidental 154
Ghost
Puff the Tuff
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
.jpg "Witch(Pearl).jpg (27 KB)")
Witch
Amy
The Invisible Boatmobile
Mad Hatter
Monstro
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 (SpongeBob's Place)
Dirty Bubble
Fred
King Gary
SpongeGary
Mermaid Snail
Patchy the Pirate[]
- Patchy the Caveman - "Ugh"
- Pagey the Pirate - "Truth or Square"
Patchy the Caveman
Pagey the Pirate
Potty the Parrot[]
- Robot - "Ugh"
Robot
Mermaid Man[]
- Ernie - "Mermaid Man Begins"
Ernie
Barnacle Boy[]
- Barnacle Man/Kyle - "Mermaid Man and Barnacle Boy V"
- Tim - "Mermaid Man Begins"
Barnacle Man/Kyle
Tim
Larry the Lobster[]
- Mermaid Man - "Appointment TV"
.jpg "Mermaid Man(Larry the Lobster).jpg (107 KB)")
Mermaid Man
Bubble Bass[]
- Captain Counselor - "Are You Afraid of the Dork?"
- The Big Bad Bubble Bass - "The Big Bad Bubble Bass"
Captain Counselor
The Big Bad Bubble Bass
Rube Goldfish[]
- Space Rube - "Patrick's Got a Zoo Loose"
Space Rube
Squidina Star[]
- Ouchie - "The Patrick Show Sells Out"
- Werewolf - "Which Witch is Which?"
Ouchie
Werewolf
Bunny Star[]
- Superhero Bunny[1] - "A Root Galoot"
Superhero Bunny
Dorsal Dan[]
Tooth Fairy
Sockeye Sammy[]
Patrick Star
Spot[]
- GarySpot - "Gary's Playhouse"
GarySpot
PatSlug[]
- Barnacle Snail - "Gary's Playhouse"
Barnacle Snail
Goofy Manager[]
- The Goobfather - "The Goobfather"
The Goobfather
SpongeBot SteelPants[]
Robo-SpongeBob MusclePants
Globulous Maximus[]
SpongeGlob