Abrasive SpongeBob is SpongeBob's abrasive side/split-personality, and the hidden main antagonist of the episode, "The Abrasive Side," where SpongeBob orders an abrasive side so he is finally able to say no but just says mean things. He is voiced by Tom Kenny. He was forced off of SpongeBob's back at the end of the episode by Sandy, and growls like a dog in anger. He is then shipped back to the manufacturer. Grandma SquarePants orders an abrasive side at the very end of the episode, much to SpongeBob's shock and horror.
He has SpongeBob's face, but it is rough and green with bushier eyebrows.
He is mean and rude. He also has a stereotypical New Jersey accent.
His personality is similar to Dr. Jeykll and Mr. Hyde or the Mask. Both are green and changes the personality. It is also similar to the symbiote from Spider-Man as it makes the wearer abrasive, like on Carnage he becomes more brutal.