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Flats the Flounder

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Well, I like to kick people's butts.
— Flats the Flounder, "The Bully"
Residence: Bikini Bottom, Pacific Ocean
Interests: Kicking people's butts
Square Dancing ("Texas")
Physical appearance
Gender: Male
Color: Light olive-green
Eye color: Light yellow with black pupils
Classification: Flounder
Siblings: Brian Flounder (brother)
Parents: Flats' Dad (father)
Mrs. Flounder (mother)
Friends: Patrick Star
Enemies: SpongeBob SquarePants
Series information
First appearance: "Sandy's Rocket"
Latest appearance: The SpongeBob Movie: Sponge Out of Water (credits)
Portrayer: Thomas F. Wilson
List of characters

Flats the Flounder [1] is a flounder who first appears as a cameo in the episode "Sandy's Rocket."

In the ending credits of The SpongeBob Movie: Sponge Out of Water, Flats makes a cameo appearance along with other Bikini Bottomites.

Flats' body is shown to be somewhat two-dimensional, hence his name.


He first appears as a cameo in the episode "Sandy's Rocket," where he was one of SpongeBob's "alien hunting" victims. He also makes another minor appearance in "Texas," where he attended Sandy's Texas party. His only major appearance, however, was in the episode "The Bully." He joins Mrs. Puff's boating school and wants to "kick SpongeBob's butt." SpongeBob takes this extremely seriously, reacting as if he were going to actually kill him. He makes many attempts to reason with and/or escape him, but to no avail. He even calls Patrick to protect him, only to find out that Flats is with him and that they were community college buddies. He also tries to go to Mrs. Puff to help, who talks to Flats (much to SpongeBob's dismay) and explains to SpongeBob that "kicking his butt" means that Flats wants to become his friend (this is obviously not true).

Flats goes so far as to chase SpongeBob out of school into town, even trying to run him over with a garbage truck. However, the garbage truck slips on a banana peel and flips over, critically injuring Flats. He wakes up in the hospital and learns that SpongeBob saved his life through CPR, yet he still wants to kick his butt. Eventually, Flats corners SpongeBob in his own home, and proceeds to "kick his butt" by repeatedly hitting him. However, SpongeBob discovers that his spongy body simply absorbs the blows and does not harm him in anyway at all.

Flats continues to hit SpongeBob throughout the whole week until he finally passes out from exhaustion one morning at boating school.

Flatts The Flounder (Texas)

Flats in Season 1


  • Flats is a flounder, which is a species of flatfish which has both eyes on one half of its body.
  • Coincidentally, Thomas F. Wilson is known for playing Biff in Back to the Future.
  • Flats' name could be a pun on Fats Domino or Rascal Flatts.
  • It is unknown why Flats needed to attend a Boating School in the first place, as he was clearly seen driving the garbage truck.
  • Flats' catchphrase is "I'm gonna kick your butt!"
  • Even after being saved by SpongeBob he still wants to kick his butt.
  • Oddly he even would threaten his dad about kicking his butt just as he did to SpongeBob.
  • Flats never had a line in any Season 1 episode.
  • Since Flats appeared in the season 1 episode, "Texas", it's safe to assume that he is already acquainted with SpongeBob, which would mean that "Texas," takes place after "The Bully," from Season 3.


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