The Mechanical Sea Monster is a contraption invented by Robert. It is made to scare off intruders.
Bio
When the Pirates arrived at Robert's hideout, everything was safe. But then Elliot saw bubbles blowing from the surface, and at that moment the mechanical sea monster emerged and scared the trio. Terrified about the dangerous creature that was attacking his friends, he decides to save them by slaying the beast. Instead, he gets eaten and George and Sedgewick were scared of what happened. Fortunately, the monster suddenly stopped and Elliot cuts through the neck and tells them that it's just mechanical and he shut it down by pulling the lever.
Episode appearances
The Sea Monster only appeared in The Pirates Who Don't Do Anything: A VeggieTales Movie.