List of alter-egos

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Throughout the series, SpongeBob and some of the other main characters have acquired alter-egos (normally only lasting one episode). An alter-ego is when a character changes form (this includes looks, name, etc.)

SpongeBob SquarePants

SpongeBob as The Maniac

SpongeBob as Fry Boy

• JellyBob - "Nature Pants"
• The Maniac - "Hall Monitor"
• Open Window Maniac -"Hall Monitor"
• SpongeBob ScaredyPants - "Scaredy Pants"
• Sponge of Mystery - Mermaid Man and Barnacle Boy II
• Patrick - "Big Pink Loser"
• The Quickster - "Mermaid Man and Barnacle Boy V"
• Krabby Patty Burglar - "Krabby Land"
• The Bird Man of Bikini Bottom - "The Sponge Who Could Fly"
• SquidBob - "SquidBob TentaclePants"
• Short Order Boy - "Krusty Krushers"
• The Yellow Avenger - The Yellow Avenger (video game)

SpongeBob as Flabby Patty Cook

• CheeseHead BrownPants - "What Ever Happened to SpongeBob?"
• Fry Boy - "Mermaid Man vs. SpongeBob"
• SpongeBob RoundPants - "To SquarePants or Not to SquarePants"
• The Normal Version of SpongeBob - "Not Normal"
• Creepy Mustache Guy - "The Pink Purloiner"
• Invincibubble - "The SpongeBob Movie: Sponge Out of Water"
• SpongeRobert - "SpongeBob LongPants"
• Flabby Patty Cook - "The Other Patty"
• Mermaid Pants - "Mermaid Pants" and "Man Ray Returns"
• Abrasive SpongeBob - "The Abrasive Side"
• Sir SpongeBob - "Dunces and Dragons"

Patrick Star

File:That's No Lady 19.jpg

• SpongeBob - "Big Pink Loser"
• The Elastic Waistband - "Mermaid Man and Barnacle Boy V"
• Sir Patrick - "Dunces and Dragons"
• Patrick SmartPants - "Patrick SmartPants"
• Patricia - "That's No Lady"
• Mr. Dr. Prof. Patrick - "Chimps Ahoy"
• Starfishman - "Creature from the Krusty Krab"
• King Patrick - "Rule of Dumb"
• The Pink Patty - "Krusty Krushers"
• Patrick-Man - "Patrick-Man!"
• Mr. Superawesomeness - "The SpongeBob Movie: Sponge Out of Water"
• Barnacle Star - "Mermaid Pants" and "Man Ray Returns"

Squidward Tentacles

Squidward as Mr. Handsome

• Squidward's Ghost - "Squidward the Unfriendly Ghost"
• Wolfgang Amadeus Tentacles - "Sleepy Time"
• Santa Claus - "Christmas Who?"
• Jen - As Seen on TV
• Captain Magma - "Mermaid Man and Barnacle Boy V"
• SquidBob - "SquidBob TentaclePants"
• Smelly - "The Thing"
• Mr. Handsome - "The Two Faces of Squidward"
• The Normal Squidward - "Not Normal"
• Gerhard Fishtrap - "Sold!"
• Hedwig Fishtrap - Sold!
• Sour Note - "The SpongeBob Movie: Sponge Out of Water"
• Doctor Negative - "Mermaid Pants"

Eugene H. Krabs

• Captain Krabs - "Arrgh!," and "Grandpappy the Pirate."
• Krabby the Clown/Cheapy the Cheapskate - "Krabby Land"
• Sir Pinch-a-Lot - "The SpongeBob Movie: Sponge Out of Water"
• Captain Tightwad - "Mermaid Pants"
• Super Tightwad - "And Krabs Saves the Day"

Sandy Cheeks

• Miss Appear - "Mermaid Man and Barnacle Boy V"
• Mr. Pavlovi - "The Fish Bowl"
• The Rodent -"The SpongeBob Movie: Sponge Out of Water"

Sheldon J. Plankton

Plankton as Mr. Plankton

• The Amazing Plankton - "Culture Shock"
• Mr. Plankton - "The Algae's Always Greener"
• Dr. Peter Lankton - "Fear of a Krabby Patty"
• Professor Plankton - "Mermaid Man vs. SpongeBob"
• Great-grammy-ma - "Gramma's Secret Recipe"
• Plank-Ton - "The SpongeBob Movie: Sponge Out of Water"

Pearl Krabs

• Amy - "As Seen on TV"

  File:Pearl-0.png

Mermaid Man

• Ernie - "Mermaid Man Begins"

Barnacle Boy

File:The Dirty Bubble, Man Ray, & Barnacle Boy2.jpg

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