After entering the Villian Containment Area in the Mermalair, Barnacle Boy informs SpongeBob that the Mermalair's Villian Containment System power has been cut due to shutting down the security system. Barnacle Boy also notices that Prawn has been freed. After being reminded, Mermaid Man becomes so enraged, making SpongeBob curious to what Prawn has done to the superhero. Barnacle Boy reveals that Prawn once put all of Mermaid Man's white clothes in the washer with a red sock, making all of his clothes pink.
After being defeated, he is once again trapped and slowly being frozen. Mermaid Man congratulates SpongeBob, although being mistakenly called "Frankie", and rewards him with a golden spatula that he found on his sock drawer, next to a bunch of formely white socks. Expressing his gratitude, SpongeBob makes a speech. However, before he could get past six words in his speech, Mermaid Man has already left and briefly returns to look if SpongeBob is still there.
He reappears briefly in the console versions of Truth or Square inside a giant glass jar in the Mermalair. He was located in the exact spot where he was defeated in the previous game. When approached, SpongeBob will be surprised and mistakenly calls him Man Ray or Dr. Shrimp.
Prawn's primary attack is sending sound waves toward SpongeBob that he must jump over to avoid damage. He is also surrounded by the blinking panels seen in earlier parts of the Mermalair. When Prawn's health gets lower, he summons Ham-Mers to aid him in battle. The only way to defeat Prawn is to wait until the panels on the ground form a straight line and SpongeBob must use his Bubble Bowl technique to damage him by rolling one down the panels that are unlit. Prawn must be damaged three times to be defeated.
Prawn has a French accent.
Prawn gets his name from a type of shrimp.
Prawn is the only boss the player faces in the Mermalair.
Prawn's battle is similar to the battle with Dingodile in Crash Bandicoot 3: Warped.
Prawn's is the only non-robot boss in the game exclusive to the game.