Seymour Scales is the antagonist of the Wii and DS game SpongeBob's Boating Bash. He claims he is a professional boating teacher who can teach SpongeBob to drive with his "patented learning system, D.R.I.V.E." After giving SpongeBob a phony license, he tries to drive away but is defeated by SpongeBob and becomes an available driver for Quick Play mode.
Seymour Scales is light bluish-gray and wears an ivory-colored shirt, purple pants, and a red and tan striped tie. He also has orange hair and eyebrows.
Upon arriving to Mrs. Puff's Boating School, he witnessed SpongeBob looking very sad. Seymour asks the sponge about his problem and why is he sad. After the sponge's answer, he offered him to be his boating teacher for his learning system, "D.R.I.V.E.", which the sponge happily accepts with the only requirement being 15 shells needed to sign up.
After SpongeBob pays, he is instructed by the shark on every step of the D.R.I.V.E course with the sponge showing great progress on destructive driving. As the lessons goes, one by one of SpongeBob's friends started joining the lessons in order to help SpongeBob through his lesson, with the exception of Squidward who only joined to smash the sponge's boat, with each paying 15 shells each.
When SpongeBob passes the final exams, he was congratulated by Seymour and after a short pictorial, his license was complete. While the sponge gives his thanks to his friends, Seymour is ready to leave. However, Mrs. Puff arrived just in time to inform SpongeBob that he was scammed with a fake learning system and license by Seymour. Devastated about the revelation, SpongeBob pursues the shark. However, Seymour already boarded on his boat and ready to run away. Unfortunately for him, SpongeBob found a similar boat which he rides to destroy Seymour's boat and to apprehend him.
During the pursuit, Seymour tries to stop SpongeBob by throwing various boat parts in an attempt to slow down and destroy SpongeBob's vehicle. However, the sponge kept pursuing Seymour and eventually was able to destroy Seymour's boat instead. After the defeat, he was apprehended by Mermaid Man and Barnacle Boy and was presumably arrested after.
Seymour's boat in the final battle is a red-colored Big Tug tugboat.
Seymour's line "And I would've gotten away with it too, if it wasn't for Mrs. Puff's meddling around!" is a reference to the television series Scooby-Doo.
Alongside all the other sharks in Bikini Bottom, Seymour is the only one with orange hair.
The final battle is the only part where SpongeBob and Seymour have unique quotes to each other.