Flats the Flounder
Flatts the Flounder is a student in SpongeBob's boating school class who wants to "kick SpongeBob's butt". He is also Patrick Star's community college buddy and is probably about the same age as him. He appeared in "Texas", where he attended Sandy's Texas party. His major appearance was in "The Bully", where he wanted to kick SpongeBob's butt. He made a cameo in "Sandy's Rocket", where he was one of SpongeBob's "alien hunting" victims. Mrs. Puff says that Flatts wants to kick SpongeBob's butt because he likes SpongeBob, but the opposite is true. SpongeBob is essentially his archenemy. He is voiced by Thomas F. Wilson.
His appearance somewhat looks like a flat fish.
